Patent Application
20140128571
The present invention relates generally to novel aromatic compounds useful as nutritional supplements, antioxidants, heavy metal chelators and/or also as intermediates for producing other useful compounds of this type.
Free radicals are unstable oxygen-containing molecules that negatively interact with other molecules in the body, in a process called oxidation. High levels of free radicals and oxidation can lead to oxidative stress. Moderate oxidative stress can trigger apoptosis: a genetically determined process of cell self destruction marked by fragmentation of nuclear DNA. More intensive oxidative stress may cause widespread necrosis or cell death.
The body naturally fights oxidation by producing glutathione (GSH). Glutathione is a tripeptide composed of three amino acid residues: glutamic acid, cysteine and glycine. Glutathione is found in all cells in the body, including the bile, the epithial lining fluid of the lungs and in the blood. Glutathione is the smallest intracellular protein thiol molecule in the cells (that is: a molecule containing an —SH or sulfhydryl group). This characteristic emphasizes its potent antioxidant action and supports a multi-faceted thiol exchange system which regulates cell activity. Glutathione is responsible for three crucial protective functions. Without it, cells disintegrate from unrestrained oxidation, the body would have little resistance to metabolic acids and the liver would shrivel up from the eventual accumulation of acidic toxins.
As noted above, the body naturally fights oxidation by producing glutathione. Once glutathione stabilizes a free radical it becomes oxidized and is usually excreted from the body. Thus, the body must replace glutathione as it is used. It should be appreciated that high levels of oxidative stress can prevent the body from recovering its normal function. The present invention relates to novel compounds useful as antioxidant dietary supplements that help maintain a healthy glutathione level allowing the body to maintain its own natural detoxifying capacity even when subjected to high levels of oxidative stress over an extended period of time.
In accordance with the objects and advantages of the present invention, novel aromatic compounds are provided incorporating sulfur containing ligands. The chemical compounds comprise:
where R1=
R2=
R3=ethyl or methyl, R4=hydrogen, glutathione, cysteine, alpha dihidrolipoic acid, aptamine, thiolphosphate, 5′thioladenosine, L-homocysteine, co-enzyme A, 2-mercaptoethanol, dithiothreitol, iodoacetate, bromoacetate, fluoroacetate or chloroacetate and n=2-4.
Other aspects of the present invention will become apparent to those skilled in this art from the following description wherein there is shown and described exemplary embodiments of this invention. As it will be realized, the invention is capable of further embodiments and its several details are capable of modification in various, obvious aspects all without departing from the invention. Accordingly, the drawings and descriptions will be regarded as illustrative in nature and not as restrictive.
As noted above, the present invention relates to novel aromatic compounds, incorporating sulfur containing ligands that are useful as nutritional supplements, antioxidants, heavy metal chelators and as intermediates for the synthesis of other related useful compounds. The chemical compounds of the present invention may be broadly described as comprising:
where R1=
R2=
R3=ethyl or methyl, R4=hydrogen, glutathione, cysteine, alpha dihidrolipoic acid, aptamine, thiolphosphate, 5′thioladenosine, L-homocysteine, co-enzyme A, 2-mercaptoethanol, dithiothreitol, iodoacetate, bromoacetate, fluoroacetate or chloroacetate and n=2-4.
The compounds of the present invention exhibit a number of unique properties that make them attractive for use in methods of (a) supplementing a diet, (b) removing heavy metals and other toxins and (c) ameliorating oxidative stress in mammals. Generally the compounds exhibit low toxicity. The compounds are also generally lipid soluble and, accordingly, after entering the plasma the compounds can enter cells of all tissues, cross the blood/brain barrier and enter the bone marrow. This is important because the damage caused by heavy metals and the oxidative stress produced by hydroxyl free radicals and other free radicals of the reactive oxygen species mostly occur in the intercellular space. In contrast, most dietary antioxidants are water soluble and cannot enter into cells effectively nor can they cross the blood/brain barrier.
It is expected that pharmaceutical compositions may be prepared by combining a pharmaceutically effective amount of a compound of the present invention with an appropriate excipient. Such compositions should be effective via various types of administration including, but not limited to, oral administration, transdermal administration, nasal administration, administration by suppository, intravenous administration and the like.
The following synthesis and examples are presented to further illustrate the invention, but it is not to be considered as limited thereto. In the examples, S-Cys refers to cysteine having a structural formula: —SCH2CH(NH2)COOH GS refers to glutathione having a structural formula:
Starting Material: Indole-1,3-dicarboxylic acid diethyl ester. Aldrich Catalog number R 163023. M.W: 261.28
Indole-1,3-dicarboxylic acid diethyl ester (2.61 g, 10 mmol) is taken in a 100 ml round bottomed flask. Methylene chloride (50 ml) is added to the flask. Oxalyl chloride (2.52 gm, 20 mmol) is added to the flask. The system is flushed with nitrogen and stirred for 24 hours. The reaction mixture may be warmed if the progress is slow. The progress is monitored using thin layer chromatography. The resulting acid chloride is used in the next step.
Cysteamine hydrochloride (2.825 gm, 25 mmol) is dissolved in a 100 ml round bottomed flask and Methylene chloride (50 ml) is added to it and stirred. Triethylamine (3.1 gm, 30 mmol) is added to it drop by drop under constant stirring. Once all the cysteamine hydrochloride has dissolved the acid chloride generated in the earlier step is added to the reaction mixture drop wise. Triethylamine (5.15 gm, 50 mmol) is added to the mixture and the stirring continued for around 12 hours. The reaction progress is monitored using thin layered chromatography. The reaction is quenched by adding water (15 ml). The mixture is separated on a separatory column. The organic layer is collected and washed three times with d.i water (15 ml×3). The layer is evaporated to collect the crude product. The crude product is purified on a silica column to obtain compound 1.
Compound 1 (0.325 gm, 1 mmol) is dissolved in 10 ml of Dimethyl formamide and 5 ml of water is added to the mixture. Glutathione (0.76 gm) is added to the mixture and stirred till it dissolved. The reaction mixture is purged with nitrogen and stirred for 30 minutes. 1 ml of 5% Hydrogen peroxide is added to it and the reaction stirred for approximately 24 hours at room temperature with regular monitoring using thin layer chromatography. The reaction mixture loaded onto a DEAE cellulose column (2 cm×20 cm long) in the hydroxide form and washed with 200 ml of distilled water. Bound material is eluted using a 0-400 mM gradient of triethylammonium bicarbonate (TEAB) buffer with 10 ml fractions being collected. Elution of compound 2 containing product is monitored by a ultraviolet flow through device. Fractions collected containing the UV absorbance is evaporated to dryness over four co-evaporations with methanol/water to remove TEAB. The resulting material is compound 2. The purity is checked with thin layered chromatography on PEI cellulose matrix developed with 0.4M ammonium bicarbonate solution.
Compound 1 (0.325 gm, 1 mmol) is dissolved in 10 ml of Dimethyl formamide and 5 ml of water is added to the mixture.
L-cysteine (0.50 gm) is added to the mixture and stirred till it dissolved. The reaction mixture is purged with nitrogen and stirred for 30 minutes. 1 ml of 5% Hydrogen peroxide is added to it and the reaction stirred for approximately 24 hours at room temperature with regular monitoring using thin layer chromatography. The reaction mixture loaded onto a DEAE cellulose column (2 cm×20 cm long) in the hydroxide form and washed with 200 ml of distilled water. Bound material is eluted using a 0-400 mM gradient of triethylammonium bicarbonate (TEAB) buffer with 10 ml fractions being collected. Elution of compound 2 containing product is monitored by a ultraviolet flow through device. Fractions collected containing the UV absorbance is evaporated to dryness over four co-evaporations with methanol/water to remove TEAB. The resulting material is compound 3. The purity is checked with thin layered chromatography on PEI cellulose matrix developed with 0.4M ammonium bicarbonate solution.
Indole-1, 3 dicarboxylic acid diethyl ester (2.61 g, 10 mmol) is taken in a 100 ml round bottomed flask. Methylene chloride (50 ml) is added to the flask. Oxalyl chloride (2.52 gm, 20 mmol) is added to the flask. The system is flushed with nitrogen and stirred for 24 hours. The reaction mixture may be warmed if the progress is slow. The progress is monitored using thin layer chromatography. The resulting acid chloride is used in the next step.
L-cysteine hydrochloride ethyl ester (2.825 gm, 25 mmol) is dissolved in a 100 ml round bottomed flask and Methylene chloride (50 ml) is added to it and stirred. Triethylamine (3.1 gm, 30 mmol) is added to it drop by drop under constant stirring. Once all the L-cysteine hydrochloride ethyl ester has dissolved the acid chloride generated in the earlier step is added to the reaction mixture drop wise. Triethylamine (5.15 gm, 50 mmol) is added to the mixture and the stirring continued for around 12 hours. The reaction progress is monitored using thin layered chromatography. The reaction is quenched by adding d.i water (15 ml). The mixture is separated on a separatory column. The organic layer is collected and washed three times with d.i water (15 ml×3). The layer is evaporated to collect the crude product. The crude product is purified on a silica column to obtain compound 4.
Compound 4 (0.469 gm, 1 mmol) is dissolved in 10 ml of Dimethyl formamide and 5 ml of water is added to the mixture. Glutathione (0.76 gm) is added to the mixture and stirred till it dissolved. The reaction mixture is purged with nitrogen and stirred for 30 minutes. 1 ml of 5% Hydrogen peroxide is added to it and the reaction stirred for approximately 24 hours at room temperature with regular monitoring using thin layer chromatography. The reaction mixture loaded onto a DEAE cellulose column (2 cm×20 cm long) in the hydroxide form and washed with 200 ml of distilled water. Bound material is eluted using a 0-400 mM gradient of triethylammonium bicarbonate (TEAB) buffer with 10 ml fractions being collected. Elution of compound 2 containing product is monitored by a ultraviolet flow through device. Fractions collected containing the UV absorbance is evaporated to dryness over four co-evaporations with methanol/water to remove TEAB. The resulting material is Compound 5. The purity is checked with thin layered chromatography on PEI cellulose matrix developed with 0.4M ammonium bicarbonate solution.
Compound 4 (0.469 gm, 1 mmol) is dissolved in 10 ml of Dimethyl formamide and 5 ml of water is added to the mixture.
L-cysteine (0.50 gm) is added to the mixture and stirred till it dissolved. The reaction mixture is purged with nitrogen and stirred for 30 minutes. 1 ml of 5% Hydrogen peroxide is added to it and the reaction stirred for approximately 24 hours at room temperature with regular monitoring using thin layer chromatography. The reaction mixture loaded onto a DEAE cellulose column (2 cm×20 cm long) in the hydroxide form and washed with 200 ml of distilled water. Bound material is eluted using a 0-400 mM gradient of triethylammonium bicarbonate (TEAB) buffer with 10 ml fractions being collected. Elution of compound 2 containing product is monitored by a ultraviolet flow through device. Fractions collected containing the UV absorbance is evaporated to dryness over four co-evaporations with methanol/water to remove TEAB. The resulting material is compound 6. The purity is checked with thin layered chromatography on PEI cellulose matrix developed with 0.4M ammonium bicarbonate solution.
Indole-1, 3 dicarboxylic acid diethyl ester (2.61 g, 10 mmol) is taken in a 100 ml round bottomed flask. Methylene chloride (50 ml) is added to the flask. Oxalyl chloride (2.52 gm, 20 mmol) is added to the flask. The system is flushed with nitrogen and stirred for 24 hours. The reaction mixture may be warmed if the progress is slow. The progress is monitored using thin layer chromatography. The resulting acid chloride is used in the next step.
L-cysteine hydrochloride methyl ester (2.625 gm, 25 mmol) is dissolved in a 100 ml round bottomed flask and Methylene chloride (50 ml) is added to it and stirred. Triethylamine (3.1 gm, 30 mmol) is added to it drop by drop under constant stirring. Once all the L-cysteine hydrochloride methyl ester has dissolved the acid chloride generated in the earlier step is added to the reaction mixture drop wise. Triethylamine (5.15 gm, 50 mmol) is added to the mixture and the stirring continued for around 12 hours. The reaction progress is monitored using thin layered chromatography. The reaction is quenched by adding water (15 ml). The mixture is separated on a separatory column. The organic layer is collected and washed three times with d.i water (15 ml×3). The layer is evaporated to collect the crude product. The crude product is purified on a silica column to obtain compound 7
Compound 7 (0.441 gm, 1 mmol) is dissolved in 10 ml of Dimethyl formamide and 5 ml of water is added to the mixture. Glutathione (0.76 gm) is added to the mixture and stirred till it dissolved. The reaction mixture is purged with nitrogen and stirred for 30 minutes. 1 ml of 5% Hydrogen peroxide is added to it and the reaction stirred for approximately 24 hours at room temperature with regular monitoring using thin layer chromatography. The reaction mixture loaded onto a DEAE cellulose column (2 cm×20 cm long) in the hydroxide form and washed with 200 ml of distilled water. Bound material is eluted using a 0-400 mM gradient of triethylammonium bicarbonate (TEAB) buffer with 10 ml fractions being collected. Elution of compound 2 containing product is monitored by a ultraviolet flow through device. Fractions collected containing the UV absorbance is evaporated to dryness over four co-evaporations with methanol/water to remove TEAB. The resulting material is Compound 8. The purity is checked with thin layered chromatography on PEI cellulose matrix developed with 0.4M ammonium bicarbonate solution.
Compound 7 (0.441 gm, 1 mmol) is dissolved in 10 ml of Dimethyl formamide and 5 ml of water is added to the mixture.
L-cysteine (0.50 gm) is added to the mixture and stirred till it dissolved. The reaction mixture is purged with nitrogen and stirred for 30 minutes. 1 ml of 5% Hydrogen peroxide is added to it and the reaction stirred for approximately 24 hours at room temperature with regular monitoring using thin layer chromatography. The reaction mixture loaded onto a DEAE cellulose column (2 cm×20 cm long) in the hydroxide form and washed with 200 ml of distilled water. Bound material is eluted using a 0-400 mM gradient of triethylammonium bicarbonate (TEAB) buffer with 10 ml fractions being collected. Elution of compound 2 containing product is monitored by a ultraviolet flow through device. Fractions collected containing the UV absorbance is evaporated to dryness over four co-evaporations with methanol/water to remove TEAB. The resulting material is compound 9. The purity is checked with thin layered chromatography on PEI cellulose matrix developed with 0.4M ammonium bicarbonate solution.
Compounds 10-18
Starting Material: 2,2′-bipyridine-3,3′-dicarboxylic acid. Aldrich Catalog number: 457191. M.W: 244.20
2,2′-bipyridine-3,3′-dicarboxylic acid (2.44 g, 10 mmol) is taken in a 100 ml round bottomed flask. Methylene chloride (50 ml) is added to the flask. Oxalyl chloride (2.52 gm, 20 mmol) is added to the flask. The system is flushed with nitrogen and stirred for 24 hours. The reaction mixture may be warmed or refluxed if the progress is slow. The progress is monitored using thin layer chromatography. The resulting acid chloride is used in the next step.
Cysteamine hydrochloride (2.825 gm, 25 mmol) is dissolved in a 100 ml round bottomed flask and Methylene chloride (50 ml) is added to it and stirred. Triethylamine (3.1 gm, 30 mmol) is added to it drop by drop under constant stirring. Once all the cysteamine hydrochloride has dissolved the acid chloride generated in the earlier step is added to the reaction mixture drop wise. Triethylamine (5.15 gm, 50 mmol) is added to the mixture and the stirring continued for around 12 hours. The reaction progress is monitored using thin layered chromatography. The reaction is quenched by adding water (15 ml). The mixture is separated on a separatory column. The organic layer is collected and washed three times with d.i water (15 ml×3). The layer is evaporated to collect the crude product. The crude product is purified on a silica column to obtain compound 10
Compound 10 (0.362 gm, 1 mmol) is dissolved in 10 ml of Dimethyl formamide and 5 ml of water is added to the mixture. Glutathione (0.76 gm) is added to the mixture and stirred till it dissolved. The reaction mixture is purged with nitrogen and stirred for 30 minutes. 1 ml of 5% Hydrogen peroxide is added to it and the reaction stirred for approximately 24 hours at room temperature with regular monitoring using thin layer chromatography. The reaction mixture loaded onto a DEAE cellulose column (2 cm×20 cm long) in the hydroxide form and washed with 200 ml of distilled water. Bound material is eluted using a 0-400 mM gradient of triethylammonium bicarbonate (TEAB) buffer with 10 ml fractions being collected. Elution of compound 2 containing product is monitored by a ultraviolet flow through device. Fractions collected containing the UV absorbance is evaporated to dryness over four co-evaporations with methanol/water to remove TEAB. The resulting material is compound 11. The purity is checked with thin layered chromatography on PEI cellulose matrix developed with 0.4M ammonium bicarbonate solution.
Compound 10 (0.362 gm, 1 mmol) is dissolved in 10 ml of Dimethyl formamide and 5 ml of water is added to the mixture.
L-cysteine (0.50 gm) is added to the mixture and stirred till it dissolved. The reaction mixture is purged with nitrogen and stirred for 30 minutes. 1 ml of 5% Hydrogen peroxide is added to it and the reaction stirred for approximately 24 hours at room temperature with regular monitoring using thin layer chromatography. The reaction mixture loaded onto a DEAE cellulose column (2 cm×20 cm long) in the hydroxide form and washed with 200 ml of distilled water. Bound material is eluted using a 0-400 mM gradient of triethylammonium bicarbonate (TEAB) buffer with 10 ml fractions being collected. Elution of compound 2 containing product is monitored by a ultraviolet flow through device. Fractions collected containing the UV absorbance is evaporated to dryness over four co-evaporations with methanol/water to remove TEAB. The resulting material is Compound 12. The purity is checked with thin layered chromatography on PEI cellulose matrix developed with 0.4M ammonium bicarbonate solution.
2,2′-bipyridine-3,3′-dicarboxylic acid (2.44 g, 10 mmol) is taken in a 100 ml round bottomed flask. Methylene chloride (50 ml) is added to the flask. Oxalyl chloride (2.52 gm, 20 mmol) is added to the flask. The system is flushed with nitrogen and stirred for 24 hours. The reaction mixture may be warmed or refluxed if the progress is slow. The progress is monitored using thin layer chromatography. The resulting acid chloride is used in the next step.
L-cysteine hydrochloride ethyl ester (2.825 gm, 25 mmol) is dissolved in a 100 ml round bottomed flask and Methylene chloride (50 ml) is added to it and stirred. Triethylamine (3.1 gm, 30 mmol) is added to it drop by drop under constant stirring. Once all the L-cysteine hydrochloride ethyl ester has dissolved the acid chloride generated in the earlier step is added to the reaction mixture drop wise. Triethylamine (5.15 gm, 50 mmol) is added to the mixture and the stirring continued for around 12 hours. The reaction progress is monitored using thin layered chromatography. The reaction is quenched by adding d.i water (15 ml). The mixture is separated on a separatory column. The organic layer is collected and washed three times with d.i water (15 ml×3). The layer is evaporated to collect the crude product. The crude product is purified on a silica column to obtain compound 13
Compound 13 (0.506 gm, 1 mmol) is dissolved in 10 ml of Dimethyl formamide and 5 ml of water is added to the mixture. Glutathione (0.76 gm) is added to the mixture and stirred till it dissolved. The reaction mixture is purged with nitrogen and stirred for 30 minutes. 1 ml of 5% Hydrogen peroxide is added to it and the reaction stirred for approximately 24 hours at room temperature with regular monitoring using thin layer chromatography. The reaction mixture loaded onto a DEAE cellulose column (2 cm×20 cm long) in the hydroxide form and washed with 200 ml of distilled water. Bound material is eluted using a 0-400 mM gradient of triethylammonium bicarbonate (TEAB) buffer with 10 ml fractions being collected. Elution of compound 2 containing product is monitored by a ultraviolet flow through device. Fractions collected containing the UV absorbance is evaporated to dryness over four co-evaporations with methanol/water to remove TEAB. The resulting material is Compound 14. The purity is checked with thin layered chromatography on PEI cellulose matrix developed with 0.4M ammonium bicarbonate solution.
Compound 13 (0.506 gm, 1 mmol) is dissolved in 10 ml of Dimethyl formamide and 5 ml of water is added to the mixture.
L-cysteine (0.50 gm) is added to the mixture and stirred till it dissolved. The reaction mixture is purged with nitrogen and stirred for 30 minutes. 1 ml of 5% Hydrogen peroxide is added to it and the reaction stirred for approximately 24 hours at room temperature with regular monitoring using thin layer chromatography. The reaction mixture loaded onto a DEAE cellulose column (2 cm×20 cm long) in the hydroxide form and washed with 200 ml of distilled water. Bound material is eluted using a 0-400 mM gradient of triethylammonium bicarbonate (TEAB) buffer with 10 ml fractions being collected. Elution of compound 2 containing product is monitored by a ultraviolet flow through device. Fractions collected containing the UV absorbance is evaporated to dryness over four co-evaporations with methanol/water to remove TEAB. The resulting material is compound 15. The purity is checked with thin layered chromatography on PEI cellulose matrix developed with 0.4M ammonium bicarbonate solution.
2,2′bipyridine-3,3′-dicarboxylic acid (2.44 g, 10 mmol) is taken in a 100 ml round bottomed flask. Methylene chloride (50 ml) is added to the flask. Oxalyl chloride (2.52 gm, 20 mmol) is added to the flask. The system is flushed with nitrogen and stirred for 24 hours. The reaction mixture may be warmed or refluxed if the progress is slow. The progress is monitored using thin layer chromatography. The resulting acid chloride is used in the next step.
L-cysteine hydrochloride methyl ester (2.625 gm, 25 mmol) is dissolved in a 100 ml round bottomed flask and Methylene chloride (50 ml) is added to it and stirred. Triethylamine (3.1 gm, 30 mmol) is added to it drop by drop under constant stirring. Once all the L-cysteine hydrochloride methyl ester has dissolved the acid chloride generated in the earlier step is added to the reaction mixture drop wise. Triethylamine (5.15 gm, 50 mmol) is added to the mixture and the stirring continued for around 12 hours. The reaction progress is monitored using thin layered chromatography. The reaction is quenched by adding water (15 ml). The mixture is separated on a separatory column. The organic layer is collected and washed three times with d.i water (15 ml×3). The layer is evaporated to collect the crude product. The crude product is purified on a silica column to obtain compound 16.
Compound 16 (0.478 gm, 1 mmol) is dissolved in 10 ml of Dimethyl formamide and 5 ml of water is added to the mixture. Glutathione (0.76 gm) is added to the mixture and stirred till it dissolved. The reaction mixture is purged with nitrogen and stirred for 30 minutes. 1 ml of 5% Hydrogen peroxide is added to it and the reaction stirred for approximately 24 hours at room temperature with regular monitoring using thin layer chromatography. The reaction mixture loaded onto a DEAE cellulose column (2 cm×20 cm long) in the hydroxide form and washed with 200 ml of distilled water. Bound material is eluted using a 0-400 mM gradient of triethylammonium bicarbonate (TEAB) buffer with 10 ml fractions being collected. Elution of compound 2 containing product is monitored by a ultraviolet flow through device. Fractions collected containing the UV absorbance is evaporated to dryness over four co-evaporations with methanol/water to remove TEAB. The resulting material is Compound 17. The purity is checked with thin layered chromatography on PEI cellulose matrix developed with 0.4M ammonium bicarbonate solution.
Compound 16 (0.478 gm, 1 mmol) is dissolved in 10 ml of Dimethyl formamide and 5 ml of water is added to the mixture.
L-cysteine (0.50 gm) is added to the mixture and stirred till it dissolved. The reaction mixture is purged with nitrogen and stirred for 30 minutes. 1 ml of 5% Hydrogen peroxide is added to it and the reaction stirred for approximately 24 hours at room temperature with regular monitoring using thin layer chromatography. The reaction mixture loaded onto a DEAE cellulose column (2 cm×20 cm long) in the hydroxide form and washed with 200 ml of distilled water. Bound material is eluted using a 0-400 mM gradient of triethylammonium bicarbonate (TEAB) buffer with 10 ml fractions being collected. Elution of compound 2 containing product is monitored by a ultraviolet flow through device. Fractions collected containing the UV absorbance is evaporated to dryness over four co-evaporations with methanol/water to remove TEAB. The resulting material is compound 18. The purity is checked with thin layered chromatography on PEI cellulose matrix developed with 0.4M ammonium bicarbonate solution.
Compounds 19-27
Starting Material: 2,2′-bipyridine-4,4′-dicarboxylic acid. Aldrich Catalog number: 457191. M.W: 244.20
2,2′-bipyridine-4,4′-dicarboxylic acid (2.44 g, 10 mmol) is taken in a 100 ml round bottomed flask. Methylene chloride (50 ml) is added to the flask. Oxalyl chloride (2.52 gm, 20 mmol) is added to the flask. The system is flushed with nitrogen and stirred for 24 hours. The reaction mixture may be warmed or refluxed if the progress is slow. The progress is monitored using thin layer chromatography. The resulting acid chloride is used in the next step.
Cysteamine hydrochloride (2.825 gm, 25 mmol) is dissolved in a 100 ml round bottomed flask and Methylene chloride (50 ml) is added to it and stirred. Triethylamine (3.1 gm, 30 mmol) is added to it drop by drop under constant stirring. Once all the cysteamine hydrochloride has dissolved the acid chloride generated in the earlier step is added to the reaction mixture drop wise. Triethylamine (5.15 gm, 50 mmol) is added to the mixture and the stirring continued for around 12 hours. The reaction progress is monitored using thin layered chromatography. The reaction is quenched by adding water (15 ml). The mixture is separated on a separatory column. The organic layer is collected and washed three times with d.i water (15 ml×3). The layer is evaporated to collect the crude product. The crude product is purified on a silica column to obtain compound 19.
Compound 19 (0.362 gm, 1 mmol) is dissolved in 10 ml of Dimethyl formamide and 5 ml of water is added to the mixture. Glutathione (0.76 gm) is added to the mixture and stirred till it dissolved. The reaction mixture is purged with nitrogen and stirred for 30 minutes. 1 ml of 5% Hydrogen peroxide is added to it and the reaction stirred for approximately 24 hours at room temperature with regular monitoring using thin layer chromatography. The reaction mixture loaded onto a DEAE cellulose column (2 cm×20 cm long) in the hydroxide form and washed with 200 ml of distilled water. Bound material is eluted using a 0-400 mM gradient of triethylammonium bicarbonate (TEAB) buffer with 10 ml fractions being collected. Elution of compound 2 containing product is monitored by a ultraviolet flow through device. Fractions collected containing the UV absorbance is evaporated to dryness over four co-evaporations with methanol/water to remove TEAB. The resulting material is compound 20. The purity is checked with thin layered chromatography on PEI cellulose matrix developed with 0.4M ammonium bicarbonate solution.
Compound 19 (0.362 gm, 1 mmol) is dissolved in 10 ml of Dimethyl formamide and 5 ml of water is added to the mixture.
L-cysteine (0.50 gm) is added to the mixture and stirred till it dissolved. The reaction mixture is purged with nitrogen and stirred for 30 minutes. 1 ml of 5% Hydrogen peroxide is added to it and the reaction stirred for approximately 24 hours at room temperature with regular monitoring using thin layer chromatography. The reaction mixture loaded onto a DEAE cellulose column (2 cm×20 cm long) in the hydroxide form and washed with 200 ml of distilled water. Bound material is eluted using a 0-400 mM gradient of triethylammonium bicarbonate (TEAB) buffer with 10 ml fractions being collected. Elution of compound 2 containing product is monitored by a ultraviolet flow through device. Fractions collected containing the UV absorbance is evaporated to dryness over four co-evaporations with methanol/water to remove TEAB. The resulting material is Compound 21. The purity is checked with thin layered chromatography on PEI cellulose matrix developed with 0.4M ammonium bicarbonate solution.
2,2′-bipyridine-4,4′-dicarboxylic acid (2.44 g, 10 mmol) is taken in a 100 ml round bottomed flask. Methylene chloride (50 ml) is added to the flask. Oxalyl chloride (2.52 gm, 20 mmol) is added to the flask. The system is flushed with nitrogen and stirred for 24 hours. The reaction mixture may be warmed or refluxed if the progress is slow. The progress is monitored using thin layer chromatography. The resulting acid chloride is used in the next step.
L-cysteine hydrochloride ethyl ester (2.825 gm, 25 mmol) is dissolved in a 100 ml round bottomed flask and Methylene chloride (50 ml) is added to it and stirred. Triethylamine (3.1 gm, 30 mmol) is added to it drop by drop under constant stirring. Once all the L-cysteine hydrochloride ethyl ester has dissolved the acid chloride generated in the earlier step is added to the reaction mixture drop wise. Triethylamine (5.15 gm, 50 mmol) is added to the mixture and the stirring continued for around 12 hours. The reaction progress is monitored using thin layered chromatography. The reaction is quenched by adding d.i water (15 ml). The mixture is separated on a separatory column. The organic layer is collected and washed three times with d.i water (15 ml×3). The layer is evaporated to collect the crude product. The crude product is purified on a silica column to obtain compound 22.
Compound 22 (0.506 gm, 1 mmol) is dissolved in 10 ml of Dimethyl formamide and 5 ml of water is added to the mixture. Glutathione (0.76 gm) is added to the mixture and stirred till it dissolved. The reaction mixture is purged with nitrogen and stirred for 30 minutes. 1 ml of 5% Hydrogen peroxide is added to it and the reaction stirred for approximately 24 hours at room temperature with regular monitoring using thin layer chromatography. The reaction mixture loaded onto a DEAE cellulose column (2 cm×20 cm long) in the hydroxide form and washed with 200 ml of distilled water. Bound material is eluted using a 0-400 mM gradient of triethylammonium bicarbonate (TEAB) buffer with 10 ml fractions being collected. Elution of compound 2 containing product is monitored by a ultraviolet flow through device. Fractions collected containing the UV absorbance is evaporated to dryness over four co-evaporations with methanol/water to remove TEAB. The resulting material is Compound 23. The purity is checked with thin layered chromatography on PEI cellulose matrix developed with 0.4M ammonium bicarbonate solution.
Compound 22 (0.506 gm, 1 mmol) is dissolved in 10 ml of Dimethyl formamide and 5 ml of water is added to the mixture.
L-cysteine (0.50 gm) is added to the mixture and stirred till it dissolved. The reaction mixture is purged with nitrogen and stirred for 30 minutes. 1 ml of 5% Hydrogen peroxide is added to it and the reaction stirred for approximately 24 hours at room temperature with regular monitoring using thin layer chromatography. The reaction mixture loaded onto a DEAE cellulose column (2 cm×20 cm long) in the hydroxide form and washed with 200 ml of distilled water. Bound material is eluted using a 0-400 mM gradient of triethylammonium bicarbonate (TEAB) buffer with 10 ml fractions being collected. Elution of compound 2 containing product is monitored by a ultraviolet flow through device. Fractions collected containing the UV absorbance is evaporated to dryness over four co-evaporations with methanol/water to remove TEAB. The resulting material is compound 24. The purity is checked with thin layered chromatography on PEI cellulose matrix developed with 0.4M ammonium bicarbonate solution.
2,2′bipyridine-4,4′-dicarboxylic acid (2.44 g, 10 mmol) is taken in a 100 ml round bottomed flask. Methylene chloride (50 ml) is added to the flask. Oxalyl chloride (2.52 gm, 20 mmol) is added to the flask. The system is flushed with nitrogen and stirred for 24 hours. The reaction mixture may be warmed or refluxed if the progress is slow. The progress is monitored using thin layer chromatography. The resulting acid chloride is used in the next step.
L-cysteine hydrochloride methyl ester (2.625 gm, 25 mmol) is dissolved in a 100 ml round bottomed flask and Methylene chloride (50 ml) is added to it and stirred. Triethylamine (3.1 gm, 30 mmol) is added to it drop by drop under constant stirring. Once all the L-cysteine hydrochloride methyl ester has dissolved the acid chloride generated in the earlier step is added to the reaction mixture drop wise. Triethylamine (5.15 gm, 50 mmol) is added to the mixture and the stirring continued for around 12 hours. The reaction progress is monitored using thin layered chromatography. The reaction is quenched by adding water (15 ml). The mixture is separated on a separatory column. The organic layer is collected and washed three times with d.i water (15 ml×3). The layer is evaporated to collect the crude product. The crude product is purified on a silica column to obtain compound 25.
Compound 25 (0.478 gm, 1 mmol) is dissolved in 10 ml of Dimethyl formamide and 5 ml of water is added to the mixture. Glutathione (0.76 gm) is added to the mixture and stirred till it dissolved. The reaction mixture is purged with nitrogen and stirred for 30 minutes. 1 ml of 5% Hydrogen peroxide is added to it and the reaction stirred for approximately 24 hours at room temperature with regular monitoring using thin layer chromatography. The reaction mixture loaded onto a DEAE cellulose column (2 cm×20 cm long) in the hydroxide form and washed with 200 ml of distilled water. Bound material is eluted using a 0-400 mM gradient of triethylammonium bicarbonate (TEAB) buffer with 10 ml fractions being collected. Elution of compound 2 containing product is monitored by a ultraviolet flow through device. Fractions collected containing the UV absorbance is evaporated to dryness over four co-evaporations with methanol/water to remove TEAB. The resulting material is Compound 26. The purity is checked with thin layered chromatography on PEI cellulose matrix developed with 0.4M ammonium bicarbonate solution.
Compound 25 (0.478 gm, 1 mmol) is dissolved in 10 ml of Dimethyl formamide and 5 ml of water is added to the mixture.
L-cysteine (0.50 gm) is added to the mixture and stirred till it dissolved. The reaction mixture is purged with nitrogen and stirred for 30 minutes. 1 ml of 5% Hydrogen peroxide is added to it and the reaction stirred for approximately 24 hours at room temperature with regular monitoring using thin layer chromatography. The reaction mixture loaded onto a DEAE cellulose column (2 cm×20 cm long) in the hydroxide form and washed with 200 ml of distilled water. Bound material is eluted using a 0-400 mM gradient of triethylammonium bicarbonate (TEAB) buffer with 10 ml fractions being collected. Elution of compound 2 containing product is monitored by a ultraviolet flow through device. Fractions collected containing the UV absorbance is evaporated to dryness over four co-evaporations with methanol/water to remove TEAB. The resulting material is compound 27. The purity is checked with thin layered chromatography on PEI cellulose matrix developed with 0.4M ammonium bicarbonate solution.
Compounds 28-36
Starting Material: 2,2′-bipyridine-6,6′-dicarboxylic acid J&K Scientific, Ltd. Product No. 28775 M.W: 244.20
2,2′-bipyridine-6,6′-dicarboxylic acid (2.44 g, 10 mmol) is taken in a 100 ml round bottomed flask. Methylene chloride (50 ml) is added to the flask. Oxalyl chloride (2.52 gm, 20 mmol) is added to the flask. The system is flushed with nitrogen and stirred for 24 hours. The reaction mixture may be warmed or refluxed if the progress is slow. The progress is monitored using thin layer chromatography. The resulting acid chloride is used in the next step.
Cysteamine hydrochloride (2.825 gm, 25 mmol) is dissolved in a 100 ml round bottomed flask and Methylene chloride (50 ml) is added to it and stirred. Triethylamine (3.1 gm, 30 mmol) is added to it drop by drop under constant stirring. Once all the cysteamine hydrochloride has dissolved the acid chloride generated in the earlier step is added to the reaction mixture drop wise. Triethylamine (5.15 gm, 50 mmol) is added to the mixture and the stirring continued for around 12 hours. The reaction progress is monitored using thin layered chromatography. The reaction is quenched by adding water (15 ml). The mixture is separated on a separatory column. The organic layer is collected and washed three times with d.i water (15 ml×3). The layer is evaporated to collect the crude product. The crude product is purified on a silica column to obtain compound 28.
Compound 28 (0.362 gm, 1 mmol) is dissolved in 10 ml of Dimethyl formamide and 5 ml of water is added to the mixture. Glutathione (0.76 gm) is added to the mixture and stirred till it dissolved. The reaction mixture is purged with nitrogen and stirred for 30 minutes. 1 ml of 5% Hydrogen peroxide is added to it and the reaction stirred for approximately 24 hours at room temperature with regular monitoring using thin layer chromatography. The reaction mixture loaded onto a DEAE cellulose column (2 cm×20 cm long) in the hydroxide form and washed with 200 ml of distilled water. Bound material is eluted using a 0-400 mM gradient of triethylammonium bicarbonate (TEAB) buffer with 10 ml fractions being collected. Elution of compound 2 containing product is monitored by a ultraviolet flow through device. Fractions collected containing the UV absorbance is evaporated to dryness over four co-evaporations with methanol/water to remove TEAB. The resulting material is compound 29. The purity is checked with thin layered chromatography on PEI cellulose matrix developed with 0.4M ammonium bicarbonate solution.
Compound 28 (0.362 gm, 1 mmol) is dissolved in 10 ml of Dimethyl formamide and 5 ml of water is added to the mixture. L-cysteine (0.50 gm) is added to the mixture and stirred till it dissolved. The reaction mixture is purged with nitrogen and stirred for 30 minutes. 1 ml of 5% Hydrogen peroxide is added to it and the reaction stirred for approximately 24 hours at room temperature with regular monitoring using thin layer chromatography. The reaction mixture loaded onto a DEAE cellulose column (2 cm×20 cm long) in the hydroxide form and washed with 200 ml of distilled water. Bound material is eluted using a 0-400 mM gradient of triethylammonium bicarbonate (TEAB) buffer with 10 ml fractions being collected. Elution of compound 2 containing product is monitored by a ultraviolet flow through device. Fractions collected containing the UV absorbance is evaporated to dryness over four co-evaporations with methanol/water to remove TEAB. The resulting material is Compound 30. The purity is checked with thin layered chromatography on PEI cellulose matrix developed with 0.4M ammonium bicarbonate solution.
2,2′-bipyridine-6,6′-dicarboxylic acid (2.44 g, 10 mmol) is taken in a 100 ml round bottomed flask. Methylene chloride (50 ml) is added to the flask. Oxalyl chloride (2.52 gm, 20 mmol) is added to the flask. The system is flushed with nitrogen and stirred for 24 hours. The reaction mixture may be warmed or refluxed if the progress is slow. The progress is monitored using thin layer chromatography. The resulting acid chloride is used in the next step.
L-cysteine hydrochloride ethyl ester (2.825 gm, 25 mmol) is dissolved in a 100 ml round bottomed flask and Methylene chloride (50 ml) is added to it and stirred. Triethylamine (3.1 gm, 30 mmol) is added to it drop by drop under constant stirring. Once all the L-cysteine hydrochloride ethyl ester has dissolved the acid chloride generated in the earlier step is added to the reaction mixture drop wise. Triethylamine (5.15 gm, 50 mmol) is added to the mixture and the stirring continued for around 12 hours. The reaction progress is monitored using thin layered chromatography. The reaction is quenched by adding d.i water (15 ml). The mixture is separated on a separatory column. The organic layer is collected and washed three times with d.i water (15 ml×3). The layer is evaporated to collect the crude product. The crude product is purified on a silica column to obtain compound 31.
Compound 31 (0.506 gm, 1 mmol) is dissolved in 10 ml of Dimethyl formamide and 5 ml of water is added to the mixture. Glutathione (0.76 gm) is added to the mixture and stirred till it dissolved. The reaction mixture is purged with nitrogen and stirred for 30 minutes. 1 ml of 5% Hydrogen peroxide is added to it and the reaction stirred for approximately 24 hours at room temperature with regular monitoring using thin layer chromatography. The reaction mixture loaded onto a DEAE cellulose column (2 cm×20 cm long) in the hydroxide form and washed with 200 ml of distilled water. Bound material is eluted using a 0-400 mM gradient of triethylammonium bicarbonate (TEAB) buffer with 10 ml fractions being collected. Elution of compound 2 containing product is monitored by a ultraviolet flow through device. Fractions collected containing the UV absorbance is evaporated to dryness over four co-evaporations with methanol/water to remove TEAB. The resulting material is Compound 32. The purity is checked with thin layered chromatography on PEI cellulose matrix developed with 0.4M ammonium bicarbonate solution.
Compound 31 (0.506 gm, 1 mmol) is dissolved in 10 ml of Dimethyl formamide and 5 ml of water is added to the mixture.
L-cysteine (0.50 gm) is added to the mixture and stirred till it dissolved. The reaction mixture is purged with nitrogen and stirred for 30 minutes. 1 ml of 5% Hydrogen peroxide is added to it and the reaction stirred for approximately 24 hours at room temperature with regular monitoring using thin layer chromatography. The reaction mixture loaded onto a DEAE cellulose column (2 cm×20 cm long) in the hydroxide form and washed with 200 ml of distilled water. Bound material is eluted using a 0-400 mM gradient of triethylammonium bicarbonate (TEAB) buffer with 10 ml fractions being collected. Elution of compound 2 containing product is monitored by a ultraviolet flow through device. Fractions collected containing the UV absorbance is evaporated to dryness over four co-evaporations with methanol/water to remove TEAB. The resulting material is compound 33. The purity is checked with thin layered chromatography on PEI cellulose matrix developed with 0.4M ammonium bicarbonate solution.
2,2′-bipyridine-6,6′-dicarboxylic acid (2.44 g, 10 mmol) is taken in a 100 ml round bottomed flask. Methylene chloride (50 ml) is added to the flask. Oxalyl chloride (2.52 gm, 20 mmol) is added to the flask. The system is flushed with nitrogen and stirred for 24 hours. The reaction mixture may be warmed or refluxed if the progress is slow. The progress is monitored using thin layer chromatography. The resulting acid chloride is used in the next step.
L-cysteine hydrochloride methyl ester (2.625 gm, 25 mmol) is dissolved in a 100 ml round bottomed flask and Methylene chloride (50 ml) is added to it and stirred. Triethylamine (3.1 gm, 30 mmol) is added to it drop by drop under constant stirring. Once all the L-cysteine hydrochloride methyl ester has dissolved the acid chloride generated in the earlier step is added to the reaction mixture drop wise. Triethylamine (5.15 gm, 50 mmol) is added to the mixture and the stirring continued for around 12 hours. The reaction progress is monitored using thin layered chromatography. The reaction is quenched by adding water (15 ml). The mixture is separated on a separatory column. The organic layer is collected and washed three times with d.i water (15 ml×3). The layer is evaporated to collect the crude product. The crude product is purified on a silica column to obtain compound 34.
Compound 34 (0.478 gm, 1 mmol) is dissolved in 10 ml of Dimethyl formamide and 5 ml of water is added to the mixture. Glutathione (0.76 gm) is added to the mixture and stirred till it dissolved. The reaction mixture is purged with nitrogen and stirred for 30 minutes. 1 ml of 5% Hydrogen peroxide is added to it and the reaction stirred for approximately 24 hours at room temperature with regular monitoring using thin layer chromatography. The reaction mixture loaded onto a DEAE cellulose column (2 cm×20 cm long) in the hydroxide form and washed with 200 ml of distilled water. Bound material is eluted using a 0-400 mM gradient of triethylammonium bicarbonate (TEAB) buffer with 10 ml fractions being collected. Elution of compound 2 containing product is monitored by a ultraviolet flow through device. Fractions collected containing the UV absorbance is evaporated to dryness over four co-evaporations with methanol/water to remove TEAB. The resulting material is Compound 35. The purity is checked with thin layered chromatography on PEI cellulose matrix developed with 0.4M ammonium bicarbonate solution.
Compound 34 (0.478 gm, 1 mmol) is dissolved in 10 ml of Dimethyl formamide and 5 ml of water is added to the mixture. L-cysteine (0.50 gm) is added to the mixture and stirred till it dissolved. The reaction mixture is purged with nitrogen and stirred for 30 minutes. 1 ml of 5% Hydrogen peroxide is added to it and the reaction stirred for approximately 24 hours at room temperature with regular monitoring using thin layer chromatography. The reaction mixture loaded onto a DEAE cellulose column (2 cm×20 cm long) in the hydroxide form and washed with 200 ml of distilled water. Bound material is eluted using a 0-400 mM gradient of triethylammonium bicarbonate (TEAB) buffer with 10 ml fractions being collected. Elution of compound 2 containing product is monitored by a ultraviolet flow through device. Fractions collected containing the UV absorbance is evaporated to dryness over four co-evaporations with methanol/water to remove TEAB. The resulting material is compound 36. The purity is checked with thin layered chromatography on PEI cellulose matrix developed with 0.4M ammonium bicarbonate solution.
Compounds 37-45
Starting Material: 2,2′-biquinoline-4,4′-dicarboxylic acid. Aldrich Catalog number: 457191. M.W: 244.20
2,2′-biquinoline-4,4′-dicarboxylic acid (2.44 g, 10 mmol) is taken in a 100 ml round bottomed flask. Methylene chloride (50 ml) is added to the flask. Oxalyl chloride (2.52 gm, 20 mmol) is added to the flask. 2 drops of DMF is added as a catalyst. The system is flushed with nitrogen and stirred for 12 hours. The reaction mixture may be warmed or refluxed if the progress is slow. The progress is monitored using thin layer chromatography. The resulting acid chloride is used in the next step.
Cysteamine hydrochloride (2.825 gm, 25 mmol) is dissolved in a 100 ml round bottomed flask and Methylene chloride (50 ml) is added to it and stirred. Triethylamine (3.1 gm, 30 mmol) is added to it drop by drop under constant stirring. Once all the cysteamine hydrochloride has dissolved the acid chloride generated in the earlier step is added to the reaction mixture drop wise. Triethylamine (5.15 gm, 50 mmol) is added to the mixture and the stirring continued for around 12 hours. The reaction progress is monitored using thin layered chromatography. The reaction is quenched by adding water (15 ml). The mixture is separated on a separatory column. The organic layer is collected and washed three times with d.i water (15 ml×3). The layer is evaporated to collect the crude product. The crude product is purified on a silica column to obtain compound 37.
Compound 37 (0.462 gm, 1 mmol) is dissolved in 10 ml of Dimethyl formamide and 5 ml of water is added to the mixture. Glutathione (0.76 gm) is added to the mixture and stirred till it dissolved. The reaction mixture is purged with nitrogen and stirred for 30 minutes. 1 ml of 5% Hydrogen peroxide is added to it and the reaction stirred for approximately 24 hours at room temperature with regular monitoring using thin layer chromatography. The reaction mixture loaded onto a DEAE cellulose column (2 cm×20 cm long) in the hydroxide form and washed with 200 ml of distilled water. Bound material is eluted using a 0-400 mM gradient of triethylammonium bicarbonate (TEAB) buffer with 10 ml fractions being collected. Elution of compound 2 containing product is monitored by a ultraviolet flow through device. Fractions collected containing the UV absorbance is evaporated to dryness over four co-evaporations with methanol/water to remove TEAB. The resulting material is compound 38. The purity is checked with thin layered chromatography on PEI cellulose matrix developed with 0.4M ammonium bicarbonate solution.
Compound 37 (0.462 gm, 1 mmol) is dissolved in 10 ml of Dimethyl formamide and 5 ml of water is added to the mixture.
L-cysteine (0.50 gm) is added to the mixture and stirred till it dissolved. The reaction mixture is purged with nitrogen and stirred for 30 minutes. 1 ml of 5% Hydrogen peroxide is added to it and the reaction stirred for approximately 24 hours at room temperature with regular monitoring using thin layer chromatography. The reaction mixture loaded onto a DEAE cellulose column (2 cm×20 cm long) in the hydroxide form and washed with 200 ml of distilled water. Bound material is eluted using a 0-400 mM gradient of triethylammonium bicarbonate (TEAB) buffer with 10 ml fractions being collected. Elution of compound 2 containing product is monitored by a ultraviolet flow through device. Fractions collected containing the UV absorbance is evaporated to dryness over four co-evaporations with methanol/water to remove TEAB. The resulting material is Compound 39. The purity is checked with thin layered chromatography on PEI cellulose matrix developed with 0.4M ammonium bicarbonate solution.
2,2′-biquinoline-4,4′-dicarboxylic acid (2.44 g, 10 mmol) is taken in a 100 ml round bottomed flask. Methylene chloride (50 ml) is added to the flask. Oxalyl chloride (2.52 gm, 20 mmol) is added to the flask. 2 drops of DMF is added as a catalyst. The system is flushed with nitrogen and stirred for 12 hours. The reaction mixture may be warmed or refluxed if the progress is slow. The progress is monitored using thin layer chromatography. The resulting acid chloride is used in the next step.
L-cysteine hydrochloride ethyl ester (2.825 gm, 25 mmol) is dissolved in a 100 ml round bottomed flask and Methylene chloride (50 ml) is added to it and stirred. Triethylamine (3.1 gm, 30 mmol) is added to it drop by drop under constant stirring. Once all the L-cysteine hydrochloride ethyl ester has dissolved the acid chloride generated in the earlier step is added to the reaction mixture drop wise. Triethylamine (5.15 gm, 50 mmol) is added to the mixture and the stirring continued for around 12 hours. The reaction progress is monitored using thin layered chromatography. The reaction is quenched by adding d.i water (15 ml). The mixture is separated on a separatory column. The organic layer is collected and washed three times with d.i water (15 ml×3). The layer is evaporated to collect the crude product. The crude product is purified on a silica column to obtain compound 40.
Compound 40 (0.606 gm, 1 mmol) is dissolved in 10 ml of Dimethyl formamide and 5 ml of water is added to the mixture. Glutathione (0.76 gm) is added to the mixture and stirred till it dissolved. The reaction mixture is purged with nitrogen and stirred for 30 minutes. 1 ml of 5% Hydrogen peroxide is added to it and the reaction stirred for approximately 24 hours at room temperature with regular monitoring using thin layer chromatography. The reaction mixture loaded onto a DEAE cellulose column (2 cm×20 cm long) in the hydroxide form and washed with 200 ml of distilled water. Bound material is eluted using a 0-400 mM gradient of triethylammonium bicarbonate (TEAB) buffer with 10 ml fractions being collected. Elution of compound 2 containing product is monitored by a ultraviolet flow through device. Fractions collected containing the UV absorbance is evaporated to dryness over four co-evaporations with methanol/water to remove TEAB. The resulting material is Compound 41. The purity is checked with thin layered chromatography on PEI cellulose matrix developed with 0.4M ammonium bicarbonate solution.
Compound 40 (0.606 gm, 1 mmol) is dissolved in 10 ml of Dimethyl formamide and 5 ml of water is added to the mixture.
L-cysteine (0.50 gm) is added to the mixture and stirred till it dissolved. The reaction mixture is purged with nitrogen and stirred for 30 minutes. 1 ml of 5% Hydrogen peroxide is added to it and the reaction stirred for approximately 24 hours at room temperature with regular monitoring using thin layer chromatography. The reaction mixture loaded onto a DEAE cellulose column (2 cm×20 cm long) in the hydroxide form and washed with 200 ml of distilled water. Bound material is eluted using a 0-400 mM gradient of triethylammonium bicarbonate (TEAB) buffer with 10 ml fractions being collected. Elution of compound 2 containing product is monitored by a ultraviolet flow through device. Fractions collected containing the UV absorbance is evaporated to dryness over four co-evaporations with methanol/water to remove TEAB. The resulting material is compound 42. The purity is checked with thin layered chromatography on PEI cellulose matrix developed with 0.4M ammonium bicarbonate solution.
2,2′-biquinoline-4,4′-dicarboxylic acid (2.44 g, 10 mmol) is taken in a 100 ml round bottomed flask. Methylene chloride (50 ml) is added to the flask. Oxalyl chloride (2.52 gm, 20 mmol) is added to the flask. 2 drops of DMF is added as a catalyst. The system is flushed with nitrogen and stirred for 12 hours. The reaction mixture may be warmed or refluxed if the progress is slow. The progress is monitored using thin layer chromatography. The resulting acid chloride is used in the next step.
L-cysteine hydrochloride methyl ester (2.625 gm, 25 mmol) is dissolved in a 100 ml round bottomed flask and Methylene chloride (50 ml) is added to it and stirred. Triethylamine (3.1 gm, 30 mmol) is added to it drop by drop under constant stirring. Once all the L-cysteine hydrochloride methyl ester has dissolved the acid chloride generated in the earlier step is added to the reaction mixture drop wise. Triethylamine (5.15 gm, 50 mmol) is added to the mixture and the stirring continued for around 12 hours. The reaction progress is monitored using thin layered chromatography. The reaction is quenched by adding water (15 ml). The mixture is separated on a separatory column. The organic layer is collected and washed three times with d.i water (15 ml×3). The layer is evaporated to collect the crude product. The crude product is purified on a silica column to obtain compound 43.
Compound 43 (0.578 gm, 1 mmol) is dissolved in 10 ml of Dimethyl formamide and 5 ml of water is added to the mixture. Glutathione (0.76 gm) is added to the mixture and stirred till it dissolved. The reaction mixture is purged with nitrogen and stirred for 30 minutes. 1 ml of 5% Hydrogen peroxide is added to it and the reaction stirred for approximately 24 hours at room temperature with regular monitoring using thin layer chromatography. The reaction mixture loaded onto a DEAE cellulose column (2 cm×20 cm long) in the hydroxide form and washed with 200 ml of distilled water. Bound material is eluted using a 0-400 mM gradient of triethylammonium bicarbonate (TEAB) buffer with 10 ml fractions being collected. Elution of compound 2 containing product is monitored by a ultraviolet flow through device. Fractions collected containing the UV absorbance is evaporated to dryness over four co-evaporations with methanol/water to remove TEAB. The resulting material is Compound 44. The purity is checked with thin layered chromatography on PEI cellulose matrix developed with 0.4M ammonium bicarbonate solution.
Compound 43 (0.578 gm, 1 mmol) is dissolved in 10 ml of Dimethyl formamide and 5 ml of water is added to the mixture.
L-cysteine (0.50 gm) is added to the mixture and stirred till it dissolved. The reaction mixture is purged with nitrogen and stirred for 30 minutes. 1 ml of 5% Hydrogen peroxide is added to it and the reaction stirred for approximately 24 hours at room temperature with regular monitoring using thin layer chromatography. The reaction mixture loaded onto a DEAE cellulose column (2 cm×20 cm long) in the hydroxide form and washed with 200 ml of distilled water. Bound material is eluted using a 0-400 mM gradient of triethylammonium bicarbonate (TEAB) buffer with 10 ml fractions being collected. Elution of compound 2 containing product is monitored by a ultraviolet flow through device. Fractions collected containing the UV absorbance is evaporated to dryness over four co-evaporations with methanol/water to remove TEAB. The resulting material is compound 45. The purity is checked with thin layered chromatography on PEI cellulose matrix developed with 0.4M ammonium bicarbonate solution.
Compounds: 46-54
Starting Material: 3,4-dihydroxythiophene-2,5-dicarboxylic acid diethyl ester. Aldrich Catalog number 553174. M.W: 260.26
3,4-dihydroxythiophene-2,5-dicarboxylic acid diethyl ester. (2.60 g, 10 mmol) is taken in a 100 ml round bottomed flask. Methylene chloride (50 ml) is added to the flask. Oxalyl chloride (2.52 gm, 20 mmol) is added to the flask. The system is flushed with nitrogen and stirred for 24 hours. The reaction mixture may be warmed if the progress is slow. The progress is monitored using thin layer chromatography. The resulting acid chloride is used in the next step.
Cysteamine hydrochloride (2.825 gm, 25 mmol) is dissolved in a 100 ml round bottomed flask and Methylene chloride (50 ml) is added to it and stirred. Triethylamine (3.1 gm, 30 mmol) is added to it drop by drop under constant stirring. Once all the cysteamine hydrochloride has dissolved the acid chloride generated in the earlier step is added to the reaction mixture drop wise. Triethylamine (5.15 gm, 50 mmol) is added to the mixture and the stirring continued for around 12 hours. The reaction progress is monitored using thin layered chromatography. The reaction is quenched by adding water (15 ml). The mixture is separated on a separatory column. The organic layer is collected and washed three times with d.i water (15 ml×3). The layer is evaporated to collect the crude product. The crude product is purified on a silica column to obtain compound 46.
Compound 46 (0.322 gm, 1 mmol) is dissolved in 10 ml of Dimethyl formamide and 5 ml of water is added to the mixture. Glutathione (0.76 gm) is added to the mixture and stirred till it dissolved. The reaction mixture is purged with nitrogen and stirred for 30 minutes. 1 ml of 5% Hydrogen peroxide is added to it and the reaction stirred for approximately 24 hours at room temperature with regular monitoring using thin layer chromatography. The reaction mixture loaded onto a DEAE cellulose column (2 cm×20 cm long) in the hydroxide form and washed with 200 ml of distilled water. Bound material is eluted using a 0-400 mM gradient of triethylammonium bicarbonate (TEAB) buffer with 10 ml fractions being collected. Elution of compound 2 containing product is monitored by a ultraviolet flow through device. Fractions collected containing the UV absorbance is evaporated to dryness over four co-evaporations with methanol/water to remove TEAB. The resulting material is compound 47. The purity is checked with thin layered chromatography on PEI cellulose matrix developed with 0.4M ammonium bicarbonate solution.
Compound 46 (0.322 gm, 1 mmol) is dissolved in 10 ml of Dimethyl formamide and 5 ml of water is added to the mixture.
L-cysteine (0.50 gm) is added to the mixture and stirred till it dissolved. The reaction mixture is purged with nitrogen and stirred for 30 minutes. 1 ml of 5% Hydrogen peroxide is added to it and the reaction stirred for approximately 24 hours at room temperature with regular monitoring using thin layer chromatography. The reaction mixture loaded onto a DEAE cellulose column (2 cm×20 cm long) in the hydroxide form and washed with 200 ml of distilled water. Bound material is eluted using a 0-400 mM gradient of triethylammonium bicarbonate (TEAB) buffer with 10 ml fractions being collected. Elution of compound 2 containing product is monitored by a ultraviolet flow through device. Fractions collected containing the UV absorbance is evaporated to dryness over four co-evaporations with methanol/water to remove TEAB. The resulting material is compound 48. The purity is checked with thin layered chromatography on PEI cellulose matrix developed with 0.4M ammonium bicarbonate solution.
3,4-dihydroxythiophene-2,5-dicarboxylic acid diethyl ester. (2.60 g, 10 mmol) is taken in a 100 ml round bottomed flask. Methylene chloride (50 ml) is added to the flask. Oxalyl chloride (2.52 gm, 20 mmol) is added to the flask. The system is flushed with nitrogen and stirred for 24 hours. The reaction mixture may be warmed if the progress is slow. The progress is monitored using thin layer chromatography. The resulting acid chloride is used in the next step.
L-cysteine hydrochloride ethyl ester (2.825 gm, 25 mmol) is dissolved in a 100 ml round bottomed flask and Methylene chloride (50 ml) is added to it and stirred. Triethylamine (3.1 gm, 30 mmol) is added to it drop by drop under constant stirring. Once all the L-cysteine hydrochloride ethyl ester has dissolved the acid chloride generated in the earlier step is added to the reaction mixture drop wise. Triethylamine (5.15 gm, 50 mmol) is added to the mixture and the stirring continued for around 12 hours. The reaction progress is monitored using thin layered chromatography. The reaction is quenched by adding d.i water (15 ml). The mixture is separated on a separatory column. The organic layer is collected and washed three times with d.i water (15 ml×3). The layer is evaporated to collect the crude product. The crude product is purified on a silica column to obtain compound 49
Compound 49 (0.466 gm, 1 mmol) is dissolved in 10 ml of Dimethyl formamide and 5 ml of water is added to the mixture. Glutathione (0.76 gm) is added to the mixture and stirred till it dissolved. The reaction mixture is purged with nitrogen and stirred for 30 minutes. 1 ml of 5% Hydrogen peroxide is added to it and the reaction stirred for approximately 24 hours at room temperature with regular monitoring using thin layer chromatography. The reaction mixture loaded onto a DEAE cellulose column (2 cm×20 cm long) in the hydroxide form and washed with 200 ml of distilled water. Bound material is eluted using a 0-400 mM gradient of triethylammonium bicarbonate (TEAB) buffer with 10 ml fractions being collected. Elution of compound 2 containing product is monitored by a ultraviolet flow through device. Fractions collected containing the UV absorbance is evaporated to dryness over four co-evaporations with methanol/water to remove TEAB. The resulting material is Compound 50. The purity is checked with thin layered chromatography on PEI cellulose matrix developed with 0.4M ammonium bicarbonate solution.
Compound 49 (0.466 gm, 1 mmol) is dissolved in 10 ml of Dimethyl formamide and 5 ml of water is added to the mixture.
L-cysteine (0.50 gm) is added to the mixture and stirred till it dissolved. The reaction mixture is purged with nitrogen and stirred for 30 minutes. 1 ml of 5% Hydrogen peroxide is added to it and the reaction stirred for approximately 24 hours at room temperature with regular monitoring using thin layer chromatography. The reaction mixture loaded onto a DEAE cellulose column (2 cm×20 cm long) in the hydroxide form and washed with 200 ml of distilled water. Bound material is eluted using a 0-400 mM gradient of triethylammonium bicarbonate (TEAB) buffer with 10 ml fractions being collected. Elution of compound 2 containing product is monitored by a ultraviolet flow through device. Fractions collected containing the UV absorbance is evaporated to dryness over four co-evaporations with methanol/water to remove TEAB. The resulting material is compound 51. The purity is checked with thin layered chromatography on PEI cellulose matrix developed with 0.4M ammonium bicarbonate solution.
3,4-dihydroxythiophene-2,5-dicarboxylic acid diethyl ester. (2.60 g, 10 mmol) is taken in a 100 ml round bottomed flask. Methylene chloride (50 ml) is added to the flask. Oxalyl chloride (2.52 gm, 20 mmol) is added to the flask. The system is flushed with nitrogen and stirred for 24 hours. The reaction mixture may be warmed if the progress is slow. The progress is monitored using thin layer chromatography. The resulting acid chloride is used in the next step.
L-cysteine hydrochloride methyl ester (2.625 gm, 25 mmol) is dissolved in a 100 ml round bottomed flask and Methylene chloride (50 ml) is added to it and stirred. Triethylamine (3.1 gm, 30 mmol) is added to it drop by drop under constant stirring. Once all the L-cysteine hydrochloride methyl ester has dissolved the acid chloride generated in the earlier step is added to the reaction mixture drop wise. Triethylamine (5.15 gm, 50 mmol) is added to the mixture and the stirring continued for around 12 hours. The reaction progress is monitored using thin layered chromatography. The reaction is quenched by adding water (15 ml). The mixture is separated on a separatory column. The organic layer is collected and washed three times with d.i water (15 ml×3). The layer is evaporated to collect the crude product. The crude product is purified on a silica column to obtain compound 52
Compound 52 (0.438 gm, 1 mmol) is dissolved in 10 ml of Dimethyl formamide and 5 ml of water is added to the mixture. Glutathione (0.76 gm) is added to the mixture and stirred till it dissolved. The reaction mixture is purged with nitrogen and stirred for 30 minutes. 1 ml of 5% Hydrogen peroxide is added to it and the reaction stirred for approximately 24 hours at room temperature with regular monitoring using thin layer chromatography. The reaction mixture loaded onto a DEAE cellulose column (2 cm×20 cm long) in the hydroxide form and washed with 200 ml of distilled water. Bound material is eluted using a 0-400 mM gradient of triethylammonium bicarbonate (TEAB) buffer with 10 ml fractions being collected. Elution of compound 2 containing product is monitored by a ultraviolet flow through device. Fractions collected containing the UV absorbance is evaporated to dryness over four co-evaporations with methanol/water to remove TEAB. The resulting material is Compound 53. The purity is checked with thin layered chromatography on PEI cellulose matrix developed with 0.4M ammonium bicarbonate solution.
Compound 52 (0.438 gm, 1 mmol) is dissolved in 10 ml of Dimethyl formamide and 5 ml of water is added to the mixture.
L-cysteine (0.50 gm) is added to the mixture and stirred till it dissolved. The reaction mixture is purged with nitrogen and stirred for 30 minutes. 1 ml of 5% Hydrogen peroxide is added to it and the reaction stirred for approximately 24 hours at room temperature with regular monitoring using thin layer chromatography. The reaction mixture loaded onto a DEAE cellulose column (2 cm×20 cm long) in the hydroxide form and washed with 200 ml of distilled water. Bound material is eluted using a 0-400 mM gradient of triethylammonium bicarbonate (TEAB) buffer with 10 ml fractions being collected. Elution of compound 2 containing product is monitored by a ultraviolet flow through device. Fractions collected containing the UV absorbance is evaporated to dryness over four co-evaporations with methanol/water to remove TEAB. The resulting material is compound 54. The purity is checked with thin layered chromatography on PEI cellulose matrix developed with 0.4M ammonium bicarbonate solution.
Compounds: 55-63
Starting Material: 3,4-dihydroxypyrrole-2,5-dicarboxylic acid. Aldrich Catalog number 553174. M.W: 187.10
3,4-dihydroxypyrrole-2,5-dicarboxylic acid (1.87 g, 10 mmol) is taken in a 100 ml round bottomed flask. Methylene chloride (50 ml) is added to the flask. Oxalyl chloride (2.52 gm, 20 mmol) is added to the flask. The system is flushed with nitrogen and stirred for 24 hours. The reaction mixture may be warmed if the progress is slow. The progress is monitored using thin layer chromatography. The resulting acid chloride is used in the next step.
Cysteamine hydrochloride (2.825 gm, 25 mmol) is dissolved in a 100 ml round bottomed flask and Methylene chloride (50 ml) is added to it and stirred. Triethylamine (3.1 gm, 30 mmol) is added to it drop by drop under constant stirring. Once all the cysteamine hydrochloride has dissolved the acid chloride generated in the earlier step is added to the reaction mixture drop wise. Triethylamine (5.15 gm, 50 mmol) is added to the mixture and the stirring continued for around 12 hours. The reaction progress is monitored using thin layered chromatography. The reaction is quenched by adding water (15 ml). The mixture is separated on a separatory column. The organic layer is collected and washed three times with d.i water (15 ml×3). The layer is evaporated to collect the crude product. The crude product is purified on a silica column to obtain compound 55.
Compound 55 (0.30 gm, 1 mmol) is dissolved in 10 ml of Dimethyl formamide and 5 ml of water is added to the mixture. Glutathione (0.76 gm) is added to the mixture and stirred till it dissolved. The reaction mixture is purged with nitrogen and stirred for 30 minutes. 1 ml of 5% Hydrogen peroxide is added to it and the reaction stirred for approximately 24 hours at room temperature with regular monitoring using thin layer chromatography. The reaction mixture loaded onto a DEAE cellulose column (2 cm×20 cm long) in the hydroxide form and washed with 200 ml of distilled water. Bound material is eluted using a 0-400 mM gradient of triethylammonium bicarbonate (TEAB) buffer with 10 ml fractions being collected. Elution of compound 2 containing product is monitored by a ultraviolet flow through device. Fractions collected containing the UV absorbance is evaporated to dryness over four co-evaporations with methanol/water to remove TEAB. The resulting material is compound 56. The purity is checked with thin layered chromatography on PEI cellulose matrix developed with 0.4M ammonium bicarbonate solution.
Compound 55 (0.30 gm, 1 mmol) is dissolved in 10 ml of Dimethyl formamide and 5 ml of water is added to the mixture.
L-cysteine (0.50 gm) is added to the mixture and stirred till it dissolved. The reaction mixture is purged with nitrogen and stirred for 30 minutes. 1 ml of 5% Hydrogen peroxide is added to it and the reaction stirred for approximately 24 hours at room temperature with regular monitoring using thin layer chromatography. The reaction mixture loaded onto a DEAE cellulose column (2 cm×20 cm long) in the hydroxide form and washed with 200 ml of distilled water. Bound material is eluted using a 0-400 mM gradient of triethylammonium bicarbonate (TEAB) buffer with 10 ml fractions being collected. Elution of compound 2 containing product is monitored by a ultraviolet flow through device. Fractions collected containing the UV absorbance is evaporated to dryness over four co-evaporations with methanol/water to remove TEAB. The resulting material is compound 57. The purity is checked with thin layered chromatography on PEI cellulose matrix developed with 0.4M ammonium bicarbonate solution.
3,4-dihydroxypyrrole-2,5-dicarboxylic acid (1.87 g, 10 mmol) is taken in a 100 ml round bottomed flask. Methylene chloride (50 ml) is added to the flask. Oxalyl chloride (2.52 gm, 20 mmol) is added to the flask. The system is flushed with nitrogen and stirred for 24 hours. The reaction mixture may be warmed if the progress is slow. The progress is monitored using thin layer chromatography. The resulting acid chloride is used in the next step.
L-cysteine hydrochloride ethyl ester (2.825 gm, 25 mmol) is dissolved in a 100 ml round bottomed flask and Methylene chloride (50 ml) is added to it and stirred. Triethylamine (3.1 gm, 30 mmol) is added to it drop by drop under constant stirring. Once all the L-cysteine hydrochloride ethyl ester has dissolved the acid chloride generated in the earlier step is added to the reaction mixture drop wise. Triethylamine (5.15 gm, 50 mmol) is added to the mixture and the stirring continued for around 12 hours. The reaction progress is monitored using thin layered chromatography. The reaction is quenched by adding d.i water (15 ml). The mixture is separated on a separatory column. The organic layer is collected and washed three times with d.i water (15 ml×3). The layer is evaporated to collect the crude product. The crude product is purified on a silica column to obtain compound 58.
Compound 58 (0.449 gm, 1 mmol) is dissolved in 10 ml of Dimethyl formamide and 5 ml of water is added to the mixture. Glutathione (0.76 gm) is added to the mixture and stirred till it dissolved. The reaction mixture is purged with nitrogen and stirred for 30 minutes. 1 ml of 5% Hydrogen peroxide is added to it and the reaction stirred for approximately 24 hours at room temperature with regular monitoring using thin layer chromatography. The reaction mixture loaded onto a DEAE cellulose column (2 cm×20 cm long) in the hydroxide form and washed with 200 ml of distilled water. Bound material is eluted using a 0-400 mM gradient of triethylammonium bicarbonate (TEAB) buffer with 10 ml fractions being collected. Elution of compound 2 containing product is monitored by a ultraviolet flow through device. Fractions collected containing the UV absorbance is evaporated to dryness over four co-evaporations with methanol/water to remove TEAB. The resulting material is Compound 59. The purity is checked with thin layered chromatography on PEI cellulose matrix developed with 0.4M ammonium bicarbonate solution.
Compound 58 (0.449 gm, 1 mmol) is dissolved in 10 ml of Dimethyl formamide and 5 ml of water is added to the mixture.
L-cysteine (0.50 gm) is added to the mixture and stirred till it dissolved. The reaction mixture is purged with nitrogen and stirred for 30 minutes. 1 ml of 5% Hydrogen peroxide is added to it and the reaction stirred for approximately 24 hours at room temperature with regular monitoring using thin layer chromatography. The reaction mixture loaded onto a DEAE cellulose column (2 cm×20 cm long) in the hydroxide form and washed with 200 ml of distilled water. Bound material is eluted using a 0-400 mM gradient of triethylammonium bicarbonate (TEAB) buffer with 10 ml fractions being collected. Elution of compound 2 containing product is monitored by a ultraviolet flow through device. Fractions collected containing the UV absorbance is evaporated to dryness over four co-evaporations with methanol/water to remove TEAB. The resulting material is compound 60. The purity is checked with thin layered chromatography on PEI cellulose matrix developed with 0.4M ammonium bicarbonate solution.
3,4-dihydroxypyrrole-2,5-dicarboxylic acid (1.87 g, 10 mmol) is taken in a 100 ml round bottomed flask. Methylene chloride (50 ml) is added to the flask. Oxalyl chloride (2.52 gm, 20 mmol) is added to the flask. The system is flushed with nitrogen and stirred for 24 hours. The reaction mixture may be warmed if the progress is slow. The progress is monitored using thin layer chromatography. The resulting acid chloride is used in the next step.
L-cysteine hydrochloride methyl ester (2.625 gm, 25 mmol) is dissolved in a 100 ml round bottomed flask and Methylene chloride (50 ml) is added to it and stirred. Triethylamine (3.1 gm, 30 mmol) is added to it drop by drop under constant stirring. Once all the L-cysteine hydrochloride methyl ester has dissolved the acid chloride generated in the earlier step is added to the reaction mixture drop wise. Triethylamine (5.15 gm, 50 mmol) is added to the mixture and the stirring continued for around 12 hours. The reaction progress is monitored using thin layered chromatography. The reaction is quenched by adding water (15 ml). The mixture is separated on a separatory column. The organic layer is collected and washed three times with d.i water (15 ml×3). The layer is evaporated to collect the crude product. The crude product is purified on a silica column to obtain compound 61.
Compound 61 (0.42 gm, 1 mmol) is dissolved in 10 ml of Dimethyl formamide and 5 ml of water is added to the mixture. Glutathione (0.76 gm) is added to the mixture and stirred till it dissolved. The reaction mixture is purged with nitrogen and stirred for 30 minutes. 1 ml of 5% Hydrogen peroxide is added to it and the reaction stirred for approximately 24 hours at room temperature with regular monitoring using thin layer chromatography. The reaction mixture loaded onto a DEAE cellulose column (2 cm×20 cm long) in the hydroxide form and washed with 200 ml of distilled water. Bound material is eluted using a 0-400 mM gradient of triethylammonium bicarbonate (TEAB) buffer with 10 ml fractions being collected. Elution of compound 2 containing product is monitored by a ultraviolet flow through device. Fractions collected containing the UV absorbance is evaporated to dryness over four co-evaporations with methanol/water to remove TEAB. The resulting material is Compound 62. The purity is checked with thin layered chromatography on PEI cellulose matrix developed with 0.4M ammonium bicarbonate solution.
Compound 61 (0.42 gm, 1 mmol) is dissolved in 10 ml of Dimethyl formamide and 5 ml of water is added to the mixture.
L-cysteine (0.50 gm) is added to the mixture and stirred till it dissolved. The reaction mixture is purged with nitrogen and stirred for 30 minutes. 1 ml of 5% Hydrogen peroxide is added to it and the reaction stirred for approximately 24 hours at room temperature with regular monitoring using thin layer chromatography. The reaction mixture loaded onto a DEAE cellulose column (2 cm×20 cm long) in the hydroxide form and washed with 200 ml of distilled water. Bound material is eluted using a 0-400 mM gradient of triethylammonium bicarbonate (TEAB) buffer with 10 ml fractions being collected. Elution of compound 2 containing product is monitored by a ultraviolet flow through device. Fractions collected containing the UV absorbance is evaporated to dryness over four co-evaporations with methanol/water to remove TEAB. The resulting material is compound 63. The purity is checked with thin layered chromatography on PEI cellulose matrix developed with 0.4M ammonium bicarbonate solution.
Compounds 64-72
Starting Material: 3,4-Ethylenedioxypyrrole-2,5-dicarboxylic acid. Aldrich Catalog number 637203. M.W: 223.50
3,4-ethylenedioxypyrrole-2,5-dicarboxylic acid (2.23 g, 10 mmol) is taken in a 100 ml round bottomed flask. Methylene chloride (50 ml) is added to the flask. Oxalyl chloride (2.52 gm, 20 mmol) is added to the flask. The system is flushed with nitrogen and stirred for 24 hours. The reaction mixture may be warmed if the progress is slow. The progress is monitored using thin layer chromatography. The resulting acid chloride is used in the next step.
Cysteamine hydrochloride (2.825 gm, 25 mmol) is dissolved in a 100 ml round bottomed flask and Methylene chloride (50 ml) is added to it and stirred. Triethylamine (3.1 gm, 30 mmol) is added to it drop by drop under constant stirring. Once all the cysteamine hydrochloride has dissolved the acid chloride generated in the earlier step is added to the reaction mixture drop wise. Triethylamine (5.15 gm, 50 mmol) is added to the mixture and the stirring continued for around 12 hours. The reaction progress is monitored using thin layered chromatography. The reaction is quenched by adding water (15 ml). The mixture is separated on a separatory column. The organic layer is collected and washed three times with d.i water (15 ml×3). The layer is evaporated to collect the crude product. The crude product is purified on a silica column to obtain compound 64.
Compound 64 (0.331 gm, 1 mmol) is dissolved in 10 ml of Dimethyl formamide and 5 ml of water is added to the mixture. Glutathione (0.76 gm) is added to the mixture and stirred till it dissolved. The reaction mixture is purged with nitrogen and stirred for 30 minutes. 1 ml of 5% Hydrogen peroxide is added to it and the reaction stirred for approximately 24 hours at room temperature with regular monitoring using thin layer chromatography. The reaction mixture loaded onto a DEAE cellulose column (2 cm×20 cm long) in the hydroxide form and washed with 200 ml of distilled water. Bound material is eluted using a 0-400 mM gradient of triethylammonium bicarbonate (TEAB) buffer with 10 ml fractions being collected. Elution of compound 2 containing product is monitored by a ultraviolet flow through device. Fractions collected containing the UV absorbance is evaporated to dryness over four co-evaporations with methanol/water to remove TEAB. The resulting material is compound 65. The purity is checked with thin layered chromatography on PEI cellulose matrix developed with 0.4M ammonium bicarbonate solution.
Compound 64 (0.331 gm, 1 mmol) is dissolved in 10 ml of Dimethyl formamide and 5 ml of water is added to the mixture.
L-cysteine (0.50 gm) is added to the mixture and stirred till it dissolved. The reaction mixture is purged with nitrogen and stirred for 30 minutes. 1 ml of 5% Hydrogen peroxide is added to it and the reaction stirred for approximately 24 hours at room temperature with regular monitoring using thin layer chromatography. The reaction mixture loaded onto a DEAE cellulose column (2 cm×20 cm long) in the hydroxide form and washed with 200 ml of distilled water. Bound material is eluted using a 0-400 mM gradient of triethylammonium bicarbonate (TEAB) buffer with 10 ml fractions being collected. Elution of compound 2 containing product is monitored by a ultraviolet flow through device. Fractions collected containing the UV absorbance is evaporated to dryness over four co-evaporations with methanol/water to remove TEAB. The resulting material is compound 66. The purity is checked with thin layered chromatography on PEI cellulose matrix developed with 0.4M ammonium bicarbonate solution.
3,4-Ethylenedioxypyrrole-2,5-dicarboxylic acid (2.23 g, 10 mmol) is taken in a 100 ml round bottomed flask. Methylene chloride (50 ml) is added to the flask. Oxalyl chloride (2.52 gm, 20 mmol) is added to the flask. The system is flushed with nitrogen and stirred for 24 hours. The reaction mixture may be warmed if the progress is slow. The progress is monitored using thin layer chromatography. The resulting acid chloride is used in the next step.
L-cysteine hydrochloride ethyl ester (2.825 gm, 25 mmol) is dissolved in a 100 ml round bottomed flask and Methylene chloride (50 ml) is added to it and stirred. Triethylamine (3.1 gm, 30 mmol) is added to it drop by drop under constant stirring. Once all the L-cysteine hydrochloride ethyl ester has dissolved the acid chloride generated in the earlier step is added to the reaction mixture drop wise. Triethylamine (5.15 gm, 50 mmol) is added to the mixture and the stirring continued for around 12 hours. The reaction progress is monitored using thin layered chromatography. The reaction is quenched by adding d.i water (15 ml). The mixture is separated on a separatory column. The organic layer is collected and washed three times with d.i water (15 ml×3). The layer is evaporated to collect the crude product. The crude product is purified on a silica column to obtain compound 67.
Compound 67 (0.475 gm, 1 mmol) is dissolved in 10 ml of Dimethyl formamide and 5 ml of water is added to the mixture. Glutathione (0.76 gm) is added to the mixture and stirred till it dissolved. The reaction mixture is purged with nitrogen and stirred for 30 minutes. 1 ml of 5% Hydrogen peroxide is added to it and the reaction stirred for approximately 24 hours at room temperature with regular monitoring using thin layer chromatography. The reaction mixture loaded onto a DEAE cellulose column (2 cm×20 cm long) in the hydroxide form and washed with 200 ml of distilled water. Bound material is eluted using a 0-400 mM gradient of triethylammonium bicarbonate (TEAB) buffer with 10 ml fractions being collected. Elution of compound 2 containing product is monitored by a ultraviolet flow through device. Fractions collected containing the UV absorbance is evaporated to dryness over four co-evaporations with methanol/water to remove TEAB. The resulting material is Compound 68. The purity is checked with thin layered chromatography on PEI cellulose matrix developed with 0.4M ammonium bicarbonate solution.
Compound 67 (0.475 gm, 1 mmol) is dissolved in 10 ml of Dimethyl formamide and 5 ml of water is added to the mixture.
L-cysteine (0.50 gm) is added to the mixture and stirred till it dissolved. The reaction mixture is purged with nitrogen and stirred for 30 minutes. 1 ml of 5% Hydrogen peroxide is added to it and the reaction stirred for approximately 24 hours at room temperature with regular monitoring using thin layer chromatography. The reaction mixture loaded onto a DEAE cellulose column (2 cm×20 cm long) in the hydroxide form and washed with 200 ml of distilled water. Bound material is eluted using a 0-400 mM gradient of triethylammonium bicarbonate (TEAB) buffer with 10 ml fractions being collected. Elution of compound 2 containing product is monitored by a ultraviolet flow through device. Fractions collected containing the UV absorbance is evaporated to dryness over four co-evaporations with methanol/water to remove TEAB. The resulting material is compound 69. The purity is checked with thin layered chromatography on PEI cellulose matrix developed with 0.4M ammonium bicarbonate solution.
3,4-Ethylenedioxypyrrole-2,5-dicarboxylic acid (2.23 g, 10 mmol) is taken in a 100 ml round bottomed flask. Methylene chloride (50 ml) is added to the flask. Oxalyl chloride (2.52 gm, 20 mmol) is added to the flask. The system is flushed with nitrogen and stirred for 24 hours. The reaction mixture may be warmed if the progress is slow. The progress is monitored using thin layer chromatography. The resulting acid chloride is used in the next step.
L-cysteine hydrochloride methyl ester (2.625 gm, 25 mmol) is dissolved in a 100 ml round bottomed flask and Methylene chloride (50 ml) is added to it and stirred. Triethylamine (3.1 gm, 30 mmol) is added to it drop by drop under constant stirring. Once all the L-cysteine hydrochloride methyl ester has dissolved the acid chloride generated in the earlier step is added to the reaction mixture drop wise. Triethylamine (5.15 gm, 50 mmol) is added to the mixture and the stirring continued for around 12 hours. The reaction progress is monitored using thin layered chromatography. The reaction is quenched by adding water (15 ml). The mixture is separated on a separatory column. The organic layer is collected and washed three times with d.i water (15 ml×3). The layer is evaporated to collect the crude product. The crude product is purified on a silica column to obtain compound 70.
Compound 70 (0.447 gm, 1 mmol) is dissolved in 10 ml of Dimethyl formamide and 5 ml of water is added to the mixture. Glutathione (0.76 gm) is added to the mixture and stirred till it dissolved. The reaction mixture is purged with nitrogen and stirred for 30 minutes. 1 ml of 5% Hydrogen peroxide is added to it and the reaction stirred for approximately 24 hours at room temperature with regular monitoring using thin layer chromatography. The reaction mixture loaded onto a DEAE cellulose column (2 cm×20 cm long) in the hydroxide form and washed with 200 ml of distilled water. Bound material is eluted using a 0-400 mM gradient of triethylammonium bicarbonate (TEAB) buffer with 10 ml fractions being collected. Elution of compound 2 containing product is monitored by a ultraviolet flow through device. Fractions collected containing the UV absorbance is evaporated to dryness over four co-evaporations with methanol/water to remove TEAB. The resulting material is Compound 71. The purity is checked with thin layered chromatography on PEI cellulose matrix developed with 0.4M ammonium bicarbonate solution.
Compound 70 (0.447 gm, 1 mmol) is dissolved in 10 ml of Dimethyl formamide and 5 ml of water is added to the mixture.
L-cysteine (0.50 gm) is added to the mixture and stirred till it dissolved. The reaction mixture is purged with nitrogen and stirred for 30 minutes. 1 ml of 5% Hydrogen peroxide is added to it and the reaction stirred for approximately 24 hours at room temperature with regular monitoring using thin layer chromatography. The reaction mixture loaded onto a DEAE cellulose column (2 cm×20 cm long) in the hydroxide form and washed with 200 ml of distilled water. Bound material is eluted using a 0-400 mM gradient of triethylammonium bicarbonate (TEAB) buffer with 10 ml fractions being collected. Elution of compound 2 containing product is monitored by a ultraviolet flow through device. Fractions collected containing the UV absorbance is evaporated to dryness over four co-evaporations with methanol/water to remove TEAB. The resulting material is compound 72. The purity is checked with thin layered chromatography on PEI cellulose matrix developed with 0.4M ammonium bicarbonate solution.
Compounds 73-81
Starting Material: 3,4-Propylenedioxythiophene-2,5-dicarboxylic acid. Aldrich Catalog number 660477. M.W: 244.22
3,4-Propylenedioxythiophene-2,5-dicarboxylic acid (2.44 g, 10 mmol) is taken in a 100 ml round bottomed flask. Methylene chloride (50 ml) is added to the flask. Oxalyl chloride (2.52 gm, 20 mmol) is added to the flask. The system is flushed with nitrogen and stirred for 24 hours. The reaction mixture may be warmed if the progress is slow. The progress is monitored using thin layer chromatography. The resulting acid chloride is used in the next step.
Cysteamine hydrochloride (2.825 gm, 25 mmol) is dissolved in a 100 ml round bottomed flask and Methylene chloride (50 ml) is added to it and stirred. Triethylamine (3.1 gm, 30 mmol) is added to it drop by drop under constant stirring. Once all the cysteamine hydrochloride has dissolved the acid chloride generated in the earlier step is added to the reaction mixture drop wise. Triethylamine (5.15 gm, 50 mmol) is added to the mixture and the stirring continued for around 12 hours. The reaction progress is monitored using thin layered chromatography. The reaction is quenched by adding water (15 ml). The mixture is separated on a separatory column. The organic layer is collected and washed three times with d.i water (15 ml×3). The layer is evaporated to collect the crude product. The crude product is purified on a silica column to obtain compound 73.
Compound 73 (0.362 gm, 1 mmol) is dissolved in 10 ml of Dimethyl formamide and 5 ml of water is added to the mixture. Glutathione (0.76 gm) is added to the mixture and stirred till it dissolved. The reaction mixture is purged with nitrogen and stirred for 30 minutes. 1 ml of 5% Hydrogen peroxide is added to it and the reaction stirred for approximately 24 hours at room temperature with regular monitoring using thin layer chromatography. The reaction mixture loaded onto a DEAE cellulose column (2 cm×20 cm long) in the hydroxide form and washed with 200 ml of distilled water. Bound material is eluted using a 0-400 mM gradient of triethylammonium bicarbonate (TEAB) buffer with 10 ml fractions being collected. Elution of compound 2 containing product is monitored by a ultraviolet flow through device. Fractions collected containing the UV absorbance is evaporated to dryness over four co-evaporations with methanol/water to remove TEAB. The resulting material is compound 74. The purity is checked with thin layered chromatography on PEI cellulose matrix developed with 0.4M ammonium bicarbonate solution.
Compound 73 (0.362 gm, 1 mmol) is dissolved in 10 ml of Dimethyl formamide and 5 ml of water is added to the mixture.
L-cysteine (0.50 gm) is added to the mixture and stirred till it dissolved. The reaction mixture is purged with nitrogen and stirred for 30 minutes. 1 ml of 5% Hydrogen peroxide is added to it and the reaction stirred for approximately 24 hours at room temperature with regular monitoring using thin layer chromatography. The reaction mixture loaded onto a DEAE cellulose column (2 cm×20 cm long) in the hydroxide form and washed with 200 ml of distilled water. Bound material is eluted using a 0-400 mM gradient of triethylammonium bicarbonate (TEAB) buffer with 10 ml fractions being collected. Elution of compound 2 containing product is monitored by a ultraviolet flow through device. Fractions collected containing the UV absorbance is evaporated to dryness over four co-evaporations with methanol/water to remove TEAB. The resulting material is compound 75. The purity is checked with thin layered chromatography on PEI cellulose matrix developed with 0.4M ammonium bicarbonate solution.
3,4-Propylenedioxythiophene-2,5-dicarboxylic acid (2.44 g, 10 mmol) is taken in a 100 ml round bottomed flask. Methylene chloride (50 ml) is added to the flask. Oxalyl chloride (2.52 gm, 20 mmol) is added to the flask. The system is flushed with nitrogen and stirred for 24 hours. The reaction mixture may be warmed if the progress is slow. The progress is monitored using thin layer chromatography. The resulting acid chloride is used in the next step.
L-cysteine hydrochloride methyl ester (2.625 gm, 25 mmol) is dissolved in a 100 ml round bottomed flask and Methylene chloride (50 ml) is added to it and stirred. Triethylamine (3.1 gm, 30 mmol) is added to it drop by drop under constant stirring. Once all the L-cysteine hydrochloride methyl ester has dissolved the acid chloride generated in the earlier step is added to the reaction mixture drop wise. Triethylamine (5.15 gm, 50 mmol) is added to the mixture and the stirring continued for around 12 hours. The reaction progress is monitored using thin layered chromatography. The reaction is quenched by adding water (15 ml). The mixture is separated on a separatory column. The organic layer is collected and washed three times with d.i water (15 ml×3). The layer is evaporated to collect the crude product. The crude product is purified on a silica column to obtain compound 76.
Compound 76 (0.478 gm, 1 mmol) is dissolved in 10 ml of Dimethyl formamide and 5 ml of water is added to the mixture. Glutathione (0.76 gm) is added to the mixture and stirred till it dissolved. The reaction mixture is purged with nitrogen and stirred for 30 minutes. 1 ml of 5% Hydrogen peroxide is added to it and the reaction stirred for approximately 24 hours at room temperature with regular monitoring using thin layer chromatography. The reaction mixture loaded onto a DEAE cellulose column (2 cm×20 cm long) in the hydroxide form and washed with 200 ml of distilled water. Bound material is eluted using a 0-400 mM gradient of triethylammonium bicarbonate (TEAB) buffer with 10 ml fractions being collected. Elution of compound 2 containing product is monitored by a ultraviolet flow through device. Fractions collected containing the UV absorbance is evaporated to dryness over four co-evaporations with methanol/water to remove TEAB. The resulting material is Compound 77. The purity is checked with thin layered chromatography on PEI cellulose matrix developed with 0.4M ammonium bicarbonate solution.
Compound 76 (0.4478 gm, 1 mmol) is dissolved in 10 ml of Dimethyl formamide and 5 ml of water is added to the mixture.
L-cysteine (0.50 gm) is added to the mixture and stirred till it dissolved. The reaction mixture is purged with nitrogen and stirred for 30 minutes. 1 ml of 5% Hydrogen peroxide is added to it and the reaction stirred for approximately 24 hours at room temperature with regular monitoring using thin layer chromatography. The reaction mixture loaded onto a DEAE cellulose column (2 cm×20 cm long) in the hydroxide form and washed with 200 ml of distilled water. Bound material is eluted using a 0-400 mM gradient of triethylammonium bicarbonate (TEAB) buffer with 10 ml fractions being collected. Elution of compound 2 containing product is monitored by a ultraviolet flow through device. Fractions collected containing the UV absorbance is evaporated to dryness over four co-evaporations with methanol/water to remove TEAB. The resulting material is compound 78. The purity is checked with thin layered chromatography on PEI cellulose matrix developed with 0.4M ammonium bicarbonate solution.
3,4-Propylenedioxythiophene-2,5-dicarboxylic acid (2.44 g, 10 mmol) is taken in a 100 ml round bottomed flask. Methylene chloride (50 ml) is added to the flask. Oxalyl chloride (2.52 gm, 20 mmol) is added to the flask. The system is flushed with nitrogen and stirred for 24 hours. The reaction mixture may be warmed if the progress is slow. The progress is monitored using thin layer chromatography. The resulting acid chloride is used in the next step.
L-cysteine hydrochloride ethyl ester (2.825 gm, 25 mmol) is dissolved in a 100 ml round bottomed flask and Methylene chloride (50 ml) is added to it and stirred. Triethylamine (3.1 gm, 30 mmol) is added to it drop by drop under constant stirring. Once all the L-cysteine hydrochloride ethyl ester has dissolved the acid chloride generated in the earlier step is added to the reaction mixture drop wise. Triethylamine (5.15 gm, 50 mmol) is added to the mixture and the stirring continued for around 12 hours. The reaction progress is monitored using thin layered chromatography. The reaction is quenched by adding d.i water (15 ml). The mixture is separated on a separatory column. The organic layer is collected and washed three times with d.i water (15 ml×3). The layer is evaporated to collect the crude product. The crude product is purified on a silica column to obtain compound 79.
Compound 79 (0.506 gm, 1 mmol) is dissolved in 10 ml of Dimethyl formamide and 5 ml of water is added to the mixture. Glutathione (0.76 gm) is added to the mixture and stirred till it dissolved. The reaction mixture is purged with nitrogen and stirred for 30 minutes. 1 ml of 5% Hydrogen peroxide is added to it and the reaction stirred for approximately 24 hours at room temperature with regular monitoring using thin layer chromatography. The reaction mixture loaded onto a DEAE cellulose column (2 cm×20 cm long) in the hydroxide form and washed with 200 ml of distilled water. Bound material is eluted using a 0-400 mM gradient of triethylammonium bicarbonate (TEAB) buffer with 10 ml fractions being collected. Elution of compound 2 containing product is monitored by a ultraviolet flow through device. Fractions collected containing the UV absorbance is evaporated to dryness over four co-evaporations with methanol/water to remove TEAB. The resulting material is Compound 80. The purity is checked with thin layered chromatography on PEI cellulose matrix developed with 0.4M ammonium bicarbonate solution.
Compound 79 (0.506 gm, 1 mmol) is dissolved in 10 ml of Dimethyl formamide and 5 ml of water is added to the mixture.
L-cysteine (0.50 gm) is added to the mixture and stirred till it dissolved. The reaction mixture is purged with nitrogen and stirred for 30 minutes. 1 ml of 5% Hydrogen peroxide is added to it and the reaction stirred for approximately 24 hours at room temperature with regular monitoring using thin layer chromatography. The reaction mixture loaded onto a DEAE cellulose column (2 cm×20 cm long) in the hydroxide form and washed with 200 ml of distilled water. Bound material is eluted using a 0-400 mM gradient of triethylammonium bicarbonate (TEAB) buffer with 10 ml fractions being collected. Elution of compound 2 containing product is monitored by a ultraviolet flow through device. Fractions collected containing the UV absorbance is evaporated to dryness over four co-evaporations with methanol/water to remove TEAB. The resulting material is compound 81. The purity is checked with thin layered chromatography on PEI cellulose matrix developed with 0.4M ammonium bicarbonate solution.
Compounds 82-90
Starting Material: 3,4-ethylenedioxythiophene-2,5-dicarboxylic acid. CAS number 108347-23.5 M.W: 230.20
3,4-ethylenedioxythiophene-2,5-dicarboxylic acid (2.30 g, 10 mmol) is taken in a 100 ml round bottomed flask. Methylene chloride (50 ml) is added to the flask. Oxalyl chloride (2.52 gm, 20 mmol) is added to the flask. The system is flushed with nitrogen and stirred for 24 hours. The reaction mixture may be warmed if the progress is slow. The progress is monitored using thin layer chromatography. The resulting acid chloride is used in the next step.
Cysteamine hydrochloride (2.825 gm, 25 mmol) is dissolved in a 100 ml round bottomed flask and Methylene chloride (50 ml) is added to it and stirred. Triethylamine (3.1 gm, 30 mmol) is added to it drop by drop under constant stirring. Once all the cysteamine hydrochloride has dissolved the acid chloride generated in the earlier step is added to the reaction mixture drop wise. Triethylamine (5.15 gm, 50 mmol) is added to the mixture and the stirring continued for around 12 hours. The reaction progress is monitored using thin layered chromatography. The reaction is quenched by adding water (15 ml). The mixture is separated on a separatory column. The organic layer is collected and washed three times with d.i water (15 ml×3). The layer is evaporated to collect the crude product. The crude product is purified on a silica column to obtain compound 82.
Compound 82 (0.348 gm, 1 mmol) is dissolved in 10 ml of Dimethyl formamide and 5 ml of water is added to the mixture. Glutathione (0.76 gm) is added to the mixture and stirred till it dissolved. The reaction mixture is purged with nitrogen and stirred for 30 minutes. 1 ml of 5% Hydrogen peroxide is added to it and the reaction stirred for approximately 24 hours at room temperature with regular monitoring using thin layer chromatography. The reaction mixture loaded onto a DEAE cellulose column (2 cm×20 cm long) in the hydroxide form and washed with 200 ml of distilled water. Bound material is eluted using a 0-400 mM gradient of triethylammonium bicarbonate (TEAB) buffer with 10 ml fractions being collected. Elution of compound 2 containing product is monitored by a ultraviolet flow through device. Fractions collected containing the UV absorbance is evaporated to dryness over four co-evaporations with methanol/water to remove TEAB. The resulting material is compound 83. The purity is checked with thin layered chromatography on PEI cellulose matrix developed with 0.4M ammonium bicarbonate solution.
Compound 82 (0.348 gm, 1 mmol) is dissolved in 10 ml of Dimethyl formamide and 5 ml of water is added to the mixture.
L-cysteine (0.50 gm) is added to the mixture and stirred till it dissolved. The reaction mixture is purged with nitrogen and stirred for 30 minutes. 1 ml of 5% Hydrogen peroxide is added to it and the reaction stirred for approximately 24 hours at room temperature with regular monitoring using thin layer chromatography. The reaction mixture loaded onto a DEAE cellulose column (2 cm×20 cm long) in the hydroxide form and washed with 200 ml of distilled water. Bound material is eluted using a 0-400 mM gradient of triethylammonium bicarbonate (TEAB) buffer with 10 ml fractions being collected. Elution of compound 2 containing product is monitored by a ultraviolet flow through device. Fractions collected containing the UV absorbance is evaporated to dryness over four co-evaporations with methanol/water to remove TEAB. The resulting material is compound 84. The purity is checked with thin layered chromatography on PEI cellulose matrix developed with 0.4M ammonium bicarbonate solution.
3,4-ethylenedioxythiophene-2,5-dicarboxylic acid (2.30 g, 10 mmol) is taken in a 100 ml round bottomed flask. Methylene chloride (50 ml) is added to the flask. Oxalyl chloride (2.52 gm, 20 mmol) is added to the flask. The system is flushed with nitrogen and stirred for 24 hours. The reaction mixture may be warmed if the progress is slow. The progress is monitored using thin layer chromatography. The resulting acid chloride is used in the next step.
L-cysteine hydrochloride ethyl ester (2.825 gm, 25 mmol) is dissolved in a 100 ml round bottomed flask and Methylene chloride (50 ml) is added to it and stirred. Triethylamine (3.1 gm, 30 mmol) is added to it drop by drop under constant stirring. Once all the L-cysteine hydrochloride ethyl ester has dissolved the acid chloride generated in the earlier step is added to the reaction mixture drop wise. Triethylamine (5.15 gm, 50 mmol) is added to the mixture and the stirring continued for around 12 hours. The reaction progress is monitored using thin layered chromatography. The reaction is quenched by adding d.i water (15 ml). The mixture is separated on a separatory column. The organic layer is collected and washed three times with d.i water (15 ml×3). The layer is evaporated to collect the crude product. The crude product is purified on a silica column to obtain compound 85.
Compound 85 (0.492 gm, 1 mmol) is dissolved in 10 ml of Dimethyl formamide and 5 ml of water is added to the mixture. Glutathione (0.76 gm) is added to the mixture and stirred till it dissolved. The reaction mixture is purged with nitrogen and stirred for 30 minutes. 1 ml of 5% Hydrogen peroxide is added to it and the reaction stirred for approximately 24 hours at room temperature with regular monitoring using thin layer chromatography. The reaction mixture loaded onto a DEAE cellulose column (2 cm×20 cm long) in the hydroxide form and washed with 200 ml of distilled water. Bound material is eluted using a 0-400 mM gradient of triethylammonium bicarbonate (TEAB) buffer with 10 ml fractions being collected. Elution of compound 2 containing product is monitored by a ultraviolet flow through device. Fractions collected containing the UV absorbance is evaporated to dryness over four co-evaporations with methanol/water to remove TEAB. The resulting material is Compound 86. The purity is checked with thin layered chromatography on PEI cellulose matrix developed with 0.4M ammonium bicarbonate solution.
Compound 85 (0.492 gm, 1 mmol) is dissolved in 10 ml of Dimethyl formamide and 5 ml of water is added to the mixture.
L-cysteine (0.50 gm) is added to the mixture and stirred till it dissolved. The reaction mixture is purged with nitrogen and stirred for 30 minutes. 1 ml of 5% Hydrogen peroxide is added to it and the reaction stirred for approximately 24 hours at room temperature with regular monitoring using thin layer chromatography. The reaction mixture loaded onto a DEAE cellulose column (2 cm×20 cm long) in the hydroxide form and washed with 200 ml of distilled water. Bound material is eluted using a 0-400 mM gradient of triethylammonium bicarbonate (TEAB) buffer with 10 ml fractions being collected. Elution of compound 2 containing product is monitored by a ultraviolet flow through device. Fractions collected containing the UV absorbance is evaporated to dryness over four co-evaporations with methanol/water to remove TEAB. The resulting material is compound 87. The purity is checked with thin layered chromatography on PEI cellulose matrix developed with 0.4M ammonium bicarbonate solution.
3,4-ethylenedioxythiophene-2,5-dicarboxylic acid (2.30 g, 10 mmol) is taken in a 100 ml round bottomed flask. Methylene chloride (50 ml) is added to the flask. Oxalyl chloride (2.52 gm, 20 mmol) is added to the flask. The system is flushed with nitrogen and stirred for 24 hours. The reaction mixture may be warmed if the progress is slow. The progress is monitored using thin layer chromatography. The resulting acid chloride is used in the next step.
L-cysteine hydrochloride methyl ester (2.625 gm, 25 mmol) is dissolved in a 100 ml round bottomed flask and Methylene chloride (50 ml) is added to it and stirred. Triethylamine (3.1 gm, 30 mmol) is added to it drop by drop under constant stirring. Once all the L-cysteine hydrochloride methyl ester has dissolved the acid chloride generated in the earlier step is added to the reaction mixture drop wise. Triethylamine (5.15 gm, 50 mmol) is added to the mixture and the stirring continued for around 12 hours. The reaction progress is monitored using thin layered chromatography. The reaction is quenched by adding water (15 ml). The mixture is separated on a separatory column. The organic layer is collected and washed three times with d.i water (15 ml×3). The layer is evaporated to collect the crude product. The crude product is purified on a silica column to obtain compound 88.
Compound 88 (0.464 gm, 1 mmol) is dissolved in 10 ml of Dimethyl formamide and 5 ml of water is added to the mixture. Glutathione (0.76 gm) is added to the mixture and stirred till it dissolved. The reaction mixture is purged with nitrogen and stirred for 30 minutes. 1 ml of 5% Hydrogen peroxide is added to it and the reaction stirred for approximately 24 hours at room temperature with regular monitoring using thin layer chromatography. The reaction mixture loaded onto a DEAE cellulose column (2 cm×20 cm long) in the hydroxide form and washed with 200 ml of distilled water. Bound material is eluted using a 0-400 mM gradient of triethylammonium bicarbonate (TEAB) buffer with 10 ml fractions being collected. Elution of compound 2 containing product is monitored by a ultraviolet flow through device. Fractions collected containing the UV absorbance is evaporated to dryness over four co-evaporations with methanol/water to remove TEAB. The resulting material is Compound 89. The purity is checked with thin layered chromatography on PEI cellulose matrix developed with 0.4M ammonium bicarbonate solution.
Compound 88 (0.464 gm, 1 mmol) is dissolved in 10 ml of Dimethyl formamide and 5 ml of water is added to the mixture.
L-cysteine (0.50 gm) is added to the mixture and stirred till it dissolved. The reaction mixture is purged with nitrogen and stirred for 30 minutes. 1 ml of 5% Hydrogen peroxide is added to it and the reaction stirred for approximately 24 hours at room temperature with regular monitoring using thin layer chromatography. The reaction mixture loaded onto a DEAE cellulose column (2 cm×20 cm long) in the hydroxide form and washed with 200 ml of distilled water. Bound material is eluted using a 0-400 mM gradient of triethylammonium bicarbonate (TEAB) buffer with 10 ml fractions being collected. Elution of compound 2 containing product is monitored by a ultraviolet flow through device. Fractions collected containing the UV absorbance is evaporated to dryness over four co-evaporations with methanol/water to remove TEAB. The resulting material is compound 90. The purity is checked with thin layered chromatography on PEI cellulose matrix developed with 0.4M ammonium bicarbonate solution.
Compounds 91-99
Starting Material: 3,4-Propylenedioxypyrrole-2,5-dicarboxylic acid. Aldrich Catalog number 637432. M.W: 227.17
3,4-propylenedioxypyrrole-2,5-dicarboxylic acid (2.27 g, 10 mmol) is taken in a 100 ml round bottomed flask. Methylene chloride (50 ml) is added to the flask. Oxalyl chloride (2.52 gm, 20 mmol) is added to the flask. The system is flushed with nitrogen and stirred for 24 hours. The reaction mixture may be warmed if the progress is slow. The progress is monitored using thin layer chromatography. The resulting acid chloride is used in the next step.
Cysteamine hydrochloride (2.825 gm, 25 mmol) is dissolved in a 100 ml round bottomed flask and Methylene chloride (50 ml) is added to it and stirred. Triethylamine (3.1 gm, 30 mmol) is added to it drop by drop under constant stirring. Once all the cysteamine hydrochloride has dissolved the acid chloride generated in the earlier step is added to the reaction mixture drop wise. Triethylamine (5.15 gm, 50 mmol) is added to the mixture and the stirring continued for around 12 hours. The reaction progress is monitored using thin layered chromatography. The reaction is quenched by adding water (15 ml). The mixture is separated on a separatory column. The organic layer is collected and washed three times with d.i water (15 ml×3). The layer is evaporated to collect the crude product. The crude product is purified on a silica column to obtain compound 91.
Compound 91 (0.345 gm, 1 mmol) is dissolved in 10 ml of Dimethyl formamide and 5 ml of water is added to the mixture. Glutathione (0.76 gm) is added to the mixture and stirred till it dissolved. The reaction mixture is purged with nitrogen and stirred for 30 minutes. 1 ml of 5% Hydrogen peroxide is added to it and the reaction stirred for approximately 24 hours at room temperature with regular monitoring using thin layer chromatography. The reaction mixture loaded onto a DEAE cellulose column (2 cm×20 cm long) in the hydroxide form and washed with 200 ml of distilled water. Bound material is eluted using a 0-400 mM gradient of triethylammonium bicarbonate (TEAB) buffer with 10 ml fractions being collected. Elution of compound 2 containing product is monitored by a ultraviolet flow through device. Fractions collected containing the UV absorbance is evaporated to dryness over four co-evaporations with methanol/water to remove TEAB. The resulting material is compound 92. The purity is checked with thin layered chromatography on PEI cellulose matrix developed with 0.4M ammonium bicarbonate solution.
Compound 91 (0.345 gm, 1 mmol) is dissolved in 10 ml of Dimethyl formamide and 5 ml of water is added to the mixture.
L-cysteine (0.50 gm) is added to the mixture and stirred till it dissolved. The reaction mixture is purged with nitrogen and stirred for 30 minutes. 1 ml of 5% Hydrogen peroxide is added to it and the reaction stirred for approximately 24 hours at room temperature with regular monitoring using thin layer chromatography. The reaction mixture loaded onto a DEAE cellulose column (2 cm×20 cm long) in the hydroxide form and washed with 200 ml of distilled water. Bound material is eluted using a 0-400 mM gradient of triethylammonium bicarbonate (TEAB) buffer with 10 ml fractions being collected. Elution of compound 2 containing product is monitored by a ultraviolet flow through device. Fractions collected containing the UV absorbance is evaporated to dryness over four co-evaporations with methanol/water to remove TEAB. The resulting material is compound 93. The purity is checked with thin layered chromatography on PEI cellulose matrix developed with 0.4M ammonium bicarbonate solution.
3,4-Propylenedioxypyrrole-2,5-dicarboxylic acid (2.27 g, 10 mmol) is taken in a 100 ml round bottomed flask. Methylene chloride (50 ml) is added to the flask. Oxalyl chloride (2.52 gm, 20 mmol) is added to the flask. The system is flushed with nitrogen and stirred for 24 hours. The reaction mixture may be warmed if the progress is slow. The progress is monitored using thin layer chromatography. The resulting acid chloride is used in the next step.
L-cysteine hydrochloride ethyl ester (2.825 gm, 25 mmol) is dissolved in a 100 ml round bottomed flask and Methylene chloride (50 ml) is added to it and stirred. Triethylamine (3.1 gm, 30 mmol) is added to it drop by drop under constant stirring. Once all the L-cysteine hydrochloride ethyl ester has dissolved the acid chloride generated in the earlier step is added to the reaction mixture drop wise. Triethylamine (5.15 gm, 50 mmol) is added to the mixture and the stirring continued for around 12 hours. The reaction progress is monitored using thin layered chromatography. The reaction is quenched by adding d.i water (15 ml). The mixture is separated on a separatory column. The organic layer is collected and washed three times with d.i water (15 ml×3). The layer is evaporated to collect the crude product. The crude product is purified on a silica column to obtain compound 94.
Compound 94 (0.489 gm, 1 mmol) is dissolved in 10 ml of Dimethyl formamide and 5 ml of water is added to the mixture. Glutathione (0.76 gm) is added to the mixture and stirred till it dissolved. The reaction mixture is purged with nitrogen and stirred for 30 minutes. 1 ml of 5% Hydrogen peroxide is added to it and the reaction stirred for approximately 24 hours at room temperature with regular monitoring using thin layer chromatography. The reaction mixture loaded onto a DEAE cellulose column (2 cm×20 cm long) in the hydroxide form and washed with 200 ml of distilled water. Bound material is eluted using a 0-400 mM gradient of triethylammonium bicarbonate (TEAB) buffer with 10 ml fractions being collected. Elution of compound 2 containing product is monitored by a ultraviolet flow through device. Fractions collected containing the UV absorbance is evaporated to dryness over four co-evaporations with methanol/water to remove TEAB. The resulting material is Compound 95. The purity is checked with thin layered chromatography on PEI cellulose matrix developed with 0.4M ammonium bicarbonate solution.
Compound 94 (0.489 gm, 1 mmol) is dissolved in 10 ml of Dimethyl formamide and 5 ml of water is added to the mixture.
L-cysteine (0.50 gm) is added to the mixture and stirred till it dissolved. The reaction mixture is purged with nitrogen and stirred for 30 minutes. 1 ml of 5% Hydrogen peroxide is added to it and the reaction stirred for approximately 24 hours at room temperature with regular monitoring using thin layer chromatography. The reaction mixture loaded onto a DEAE cellulose column (2 cm×20 cm long) in the hydroxide form and washed with 200 ml of distilled water. Bound material is eluted using a 0-400 mM gradient of triethylammonium bicarbonate (TEAB) buffer with 10 ml fractions being collected. Elution of compound 2 containing product is monitored by a ultraviolet flow through device. Fractions collected containing the UV absorbance is evaporated to dryness over four co-evaporations with methanol/water to remove TEAB. The resulting material is compound 96. The purity is checked with thin layered chromatography on PEI cellulose matrix developed with 0.4M ammonium bicarbonate solution.
3,4-Propylenedioxypyrrole-2,5-dicarboxylic acid (2.27 g, 10 mmol) is taken in a 100 ml round bottomed flask. Methylene chloride (50 ml) is added to the flask. Oxalyl chloride (2.52 gm, 20 mmol) is added to the flask. The system is flushed with nitrogen and stirred for 24 hours. The reaction mixture may be warmed if the progress is slow. The progress is monitored using thin layer chromatography. The resulting acid chloride is used in the next step.
L-cysteine hydrochloride methyl ester (2.625 gm, 25 mmol) is dissolved in a 100 ml round bottomed flask and Methylene chloride (50 ml) is added to it and stirred. Triethylamine (3.1 gm, 30 mmol) is added to it drop by drop under constant stirring. Once all the L-cysteine hydrochloride methyl ester has dissolved the acid chloride generated in the earlier step is added to the reaction mixture drop wise. Triethylamine (5.15 gm, 50 mmol) is added to the mixture and the stirring continued for around 12 hours. The reaction progress is monitored using thin layered chromatography. The reaction is quenched by adding water (15 ml). The mixture is separated on a separatory column. The organic layer is collected and washed three times with d.i water (15 ml×3). The layer is evaporated to collect the crude product. The crude product is purified on a silica column to obtain compound 97.
Compound 97 (0.461 gm, 1 mmol) is dissolved in 10 ml of Dimethyl formamide and 5 ml of water is added to the mixture. Glutathione (0.76 gm) is added to the mixture and stirred till it dissolved. The reaction mixture is purged with nitrogen and stirred for 30 minutes. 1 ml of 5% Hydrogen peroxide is added to it and the reaction stirred for approximately 24 hours at room temperature with regular monitoring using thin layer chromatography. The reaction mixture loaded onto a DEAE cellulose column (2 cm×20 cm long) in the hydroxide form and washed with 200 ml of distilled water. Bound material is eluted using a 0-400 mM gradient of triethylammonium bicarbonate (TEAB) buffer with 10 ml fractions being collected. Elution of compound 2 containing product is monitored by a ultraviolet flow through device. Fractions collected containing the UV absorbance is evaporated to dryness over four co-evaporations with methanol/water to remove TEAB. The resulting material is Compound 98. The purity is checked with thin layered chromatography on PEI cellulose matrix developed with 0.4M ammonium bicarbonate solution.
Compound 97 (0.461 gm, 1 mmol) is dissolved in 10 ml of Dimethyl formamide and 5 ml of water is added to the mixture.
L-cysteine (0.50 gm) is added to the mixture and stirred till it dissolved. The reaction mixture is purged with nitrogen and stirred for 30 minutes. 1 ml of 5% Hydrogen peroxide is added to it and the reaction stirred for approximately 24 hours at room temperature with regular monitoring using thin layer chromatography. The reaction mixture loaded onto a DEAE cellulose column (2 cm×20 cm long) in the hydroxide form and washed with 200 ml of distilled water. Bound material is eluted using a 0-400 mM gradient of triethylammonium bicarbonate (TEAB) buffer with 10 ml fractions being collected. Elution of compound 2 containing product is monitored by a ultraviolet flow through device. Fractions collected containing the UV absorbance is evaporated to dryness over four co-evaporations with methanol/water to remove TEAB. The resulting material is compound 99. The purity is checked with thin layered chromatography on PEI cellulose matrix developed with 0.4M ammonium bicarbonate solution.
Starting Material: Biphenyl-2,2′-dicarboxylic acid. Aldrich Catalog number: 126691. M.W: 242.23
Biphenyl-2,2′-dicarboxylic acid (2.42 g, 10 mmol) is taken in a 100 ml round bottomed flask. Methylene chloride (50 ml) is added to the flask. Oxalyl chloride (2.52 gm, 20 mmol) is added to the flask. 2 drops of DMF is added as a catalyst. The system is flushed with nitrogen and refluxed for 24 hours. The progress is monitored using thin layer chromatography. The resulting acid chloride is used in the next step.
Cysteamine hydrochloride (2.825 gm, 25 mmol) is dissolved in a 100 ml round bottomed flask and Methylene chloride (50 ml) is added to it and stirred. Triethylamine (3.1 gm, 30 mmol) is added to it drop by drop under constant stirring. Once all the cysteamine hydrochloride has dissolved the acid chloride generated in the earlier step is added to the reaction mixture drop wise. Triethylamine (5.15 gm, 50 mmol) is added to the mixture and the stirring continued for around 12 hours. The reaction progress is monitored using thin layered chromatography. The reaction is quenched by adding water (15 ml). The mixture is separated on a separatory column. The organic layer is collected and washed three times with d.i water (15 ml×3). The layer is evaporated to collect the crude product. The crude product is purified on a silica column to obtain compound 100.
Compound 100 (0.360 gm, 1 mmol) is dissolved in 10 ml of Dimethyl formamide and 5 ml of water is added to the mixture. Glutathione (0.76 gm) is added to the mixture and stirred till it dissolved. The reaction mixture is purged with nitrogen and stirred for 30 minutes. 1 ml of 5% Hydrogen peroxide is added to it and the reaction stirred for approximately 24 hours at room temperature with regular monitoring using thin layer chromatography. The reaction mixture loaded onto a DEAE cellulose column (2 cm×20 cm long) in the hydroxide form and washed with 200 ml of distilled water. Bound material is eluted using a 0-400 mM gradient of triethylammonium bicarbonate (TEAB) buffer with 10 ml fractions being collected. Elution of compound 2 containing product is monitored by a ultraviolet flow through device. Fractions collected containing the UV absorbance is evaporated to dryness over four co-evaporations with methanol/water to remove TEAB. The resulting material is compound 101. The purity is checked with thin layered chromatography on PEI cellulose matrix developed with 0.4M ammonium bicarbonate solution.
Compound 100 (0.362 gm, 1 mmol) is dissolved in 10 ml of Dimethyl formamide and 5 ml of water is added to the mixture.
L-cysteine (0.50 gm) is added to the mixture and stirred till it dissolved. The reaction mixture is purged with nitrogen and stirred for 30 minutes. 1 ml of 5% Hydrogen peroxide is added to it and the reaction stirred for approximately 24 hours at room temperature with regular monitoring using thin layer chromatography. The reaction mixture loaded onto a DEAE cellulose column (2 cm×20 cm long) in the hydroxide form and washed with 200 ml of distilled water. Bound material is eluted using a 0-400 mM gradient of triethylammonium bicarbonate (TEAB) buffer with 10 ml fractions being collected. Elution of compound 2 containing product is monitored by a ultraviolet flow through device. Fractions collected containing the UV absorbance is evaporated to dryness over four co-evaporations with methanol/water to remove TEAB. The resulting material is Compound 102. The purity is checked with thin layered chromatography on PEI cellulose matrix developed with 0.4M ammonium bicarbonate solution.
2 Biphenyl-2,2′-dicarboxylic acid (2.42 g, 10 mmol) is taken in a 100 ml round bottomed flask. Methylene chloride (50 ml) is added to the flask. Oxalyl chloride (2.52 gm, 20 mmol) is added to the flask. 2 drops of DMF is added as a catalyst. The system is flushed with nitrogen and refluxed for 24 hours. The progress is monitored using thin layer chromatography. The resulting acid chloride is used in the next step.
L-cysteine hydrochloride ethyl ester (2.825 gm, 25 mmol) is dissolved in a 100 ml round bottomed flask and Methylene chloride (50 ml) is added to it and stirred. Triethylamine (3.1 gm, 30 mmol) is added to it drop by drop under constant stirring. Once all the L-cysteine hydrochloride ethyl ester has dissolved the acid chloride generated in the earlier step is added to the reaction mixture drop wise. Triethylamine (5.15 gm, 50 mmol) is added to the mixture and the stirring continued for around 12 hours. The reaction progress is monitored using thin layered chromatography. The reaction is quenched by adding d.i water (15 ml). The mixture is separated on a separatory column. The organic layer is collected and washed three times with d.i water (15 ml×3). The layer is evaporated to collect the crude product. The crude product is purified on a silica column to obtain compound 103.
Compound 103 (0.506 gm, 1 mmol) is dissolved in 10 ml of Dimethyl formamide and 5 ml of water is added to the mixture. Glutathione (0.76 gm) is added to the mixture and stirred till it dissolved. The reaction mixture is purged with nitrogen and stirred for 30 minutes. 1 ml of 5% Hydrogen peroxide is added to it and the reaction stirred for approximately 24 hours at room temperature with regular monitoring using thin layer chromatography. The reaction mixture loaded onto a DEAE cellulose column (2 cm×20 cm long) in the hydroxide form and washed with 200 ml of distilled water. Bound material is eluted using a 0-400 mM gradient of triethylammonium bicarbonate (TEAB) buffer with 10 ml fractions being collected. Elution of compound 2 containing product is monitored by a ultraviolet flow through device. Fractions collected containing the UV absorbance is evaporated to dryness over four co-evaporations with methanol/water to remove TEAB. The resulting material is Compound 104. The purity is checked with thin layered chromatography on PEI cellulose matrix developed with 0.4M ammonium bicarbonate solution.
Compound 103 (0.506 gm, 1 mmol) is dissolved in 10 ml of Dimethyl formamide and 5 ml of water is added to the mixture.
L-cysteine (0.50 gm) is added to the mixture and stirred till it dissolved. The reaction mixture is purged with nitrogen and stirred for 30 minutes. 1 ml of 5% Hydrogen peroxide is added to it and the reaction stirred for approximately 24 hours at room temperature with regular monitoring using thin layer chromatography. The reaction mixture loaded onto a DEAE cellulose column (2 cm×20 cm long) in the hydroxide form and washed with 200 ml of distilled water. Bound material is eluted using a 0-400 mM gradient of triethylammonium bicarbonate (TEAB) buffer with 10 ml fractions being collected. Elution of compound 2 containing product is monitored by a ultraviolet flow through device. Fractions collected containing the UV absorbance is evaporated to dryness over four co-evaporations with methanol/water to remove TEAB. The resulting material is compound 105. The purity is checked with thin layered chromatography on PEI cellulose matrix developed with 0.4M ammonium bicarbonate solution.
Biphenyl-2,2′-dicarboxylic acid (2.42 g, 10 mmol) is taken in a 100 ml round bottomed flask. Methylene chloride (50 ml) is added to the flask. Oxalyl chloride (2.52 gm, 20 mmol) is added to the flask. 2 drops of DMF is added as a catalyst. The system is flushed with nitrogen and refluxed for 24 hours. The progress is monitored using thin layer chromatography. The resulting acid chloride is used in the next step.
L-cysteine hydrochloride methyl ester (2.625 gm, 25 mmol) is dissolved in a 100 ml round bottomed flask and Methylene chloride (50 ml) is added to it and stirred. Triethylamine (3.1 gm, 30 mmol) is added to it drop by drop under constant stirring. Once all the L-cysteine hydrochloride methyl ester has dissolved the acid chloride generated in the earlier step is added to the reaction mixture drop wise. Triethylamine (5.15 gm, 50 mmol) is added to the mixture and the stirring continued for around 12 hours. The reaction progress is monitored using thin layered chromatography. The reaction is quenched by adding water (15 ml). The mixture is separated on a separatory column. The organic layer is collected and washed three times with d.i water (15 ml×3). The layer is evaporated to collect the crude product. The crude product is purified on a silica column to obtain compound 106.
Compound 106 (0.478 gm, 1 mmol) is dissolved in 10 ml of Dimethyl formamide and 5 ml of water is added to the mixture. Glutathione (0.76 gm) is added to the mixture and stirred till it dissolved. The reaction mixture is purged with nitrogen and stirred for 30 minutes. 1 ml of 5% Hydrogen peroxide is added to it and the reaction stirred for approximately 24 hours at room temperature with regular monitoring using thin layer chromatography. The reaction mixture loaded onto a DEAE cellulose column (2 cm×20 cm long) in the hydroxide form and washed with 200 ml of distilled water. Bound material is eluted using a 0-400 mM gradient of triethylammonium bicarbonate (TEAB) buffer with 10 ml fractions being collected. Elution of compound 2 containing product is monitored by a ultraviolet flow through device. Fractions collected containing the UV absorbance is evaporated to dryness over four co-evaporations with methanol/water to remove TEAB. The resulting material is Compound 107. The purity is checked with thin layered chromatography on PEI cellulose matrix developed with 0.4M ammonium bicarbonate solution.
Compound 106 (0.478 gm, 1 mmol) is dissolved in 10 ml of Dimethyl formamide and 5 ml of water is added to the mixture.
L-cysteine (0.50 gm) is added to the mixture and stirred till it dissolved. The reaction mixture is purged with nitrogen and stirred for 30 minutes. 1 ml of 5% Hydrogen peroxide is added to it and the reaction stirred for approximately 24 hours at room temperature with regular monitoring using thin layer chromatography. The reaction mixture loaded onto a DEAE cellulose column (2 cm×20 cm long) in the hydroxide form and washed with 200 ml of distilled water. Bound material is eluted using a 0-400 mM gradient of triethylammonium bicarbonate (TEAB) buffer with 10 ml fractions being collected. Elution of compound 2 containing product is monitored by a ultraviolet flow through device. Fractions collected containing the UV absorbance is evaporated to dryness over four co-evaporations with methanol/water to remove TEAB. The resulting material is compound 108. The purity is checked with thin layered chromatography on PEI cellulose matrix developed with 0.4M ammonium bicarbonate solution.
Compounds 109-117
Starting Material: Chelidonic acid or 4-oxo-4H-pyran-2,6-dicarboxylic acid. Fluka Catalog number 22500. M.W: 184.10
Chelidonic acid (1.84 g, 10 mmol) is taken in a 100 ml round bottomed flask. Methylene chloride (50 ml) is added to the flask. Oxalyl chloride (2.52 gm, 20 mmol) is added to the flask. The system is flushed with nitrogen and stirred for 24 hours. The reaction mixture may be warmed if the progress is slow. The progress is monitored using thin layer chromatography. The resulting acid chloride is used in the next step.
Cysteamine hydrochloride (2.825 gm, 25 mmol) is dissolved in a 100 ml round bottomed flask and Methylene chloride (50 ml) is added to it and stirred. Triethylamine (3.1 gm, 30 mmol) is added to it drop by drop under constant stirring. Once all the cysteamine hydrochloride has dissolved the acid chloride generated in the earlier step is added to the reaction mixture drop wise. Triethylamine (5.15 gm, 50 mmol) is added to the mixture and the stirring continued for around 12 hours. The reaction progress is monitored using thin layered chromatography. The reaction is quenched by adding water (15 ml). The mixture is separated on a separatory column. The organic layer is collected and washed three times with d.i water (15 ml×3). The layer is evaporated to collect the crude product. The crude product is purified on a silica column to obtain compound 109.
Compound 109 (0.300 gm, 1 mmol) is dissolved in 10 ml of Dimethyl formamide and 5 ml of water is added to the mixture. Glutathione (0.76 gm) is added to the mixture and stirred till it dissolved. The reaction mixture is purged with nitrogen and stirred for 30 minutes. 1 ml of 5% Hydrogen peroxide is added to it and the reaction stirred for approximately 24 hours at room temperature with regular monitoring using thin layer chromatography. The reaction mixture loaded onto a DEAE cellulose column (2 cm×20 cm long) in the hydroxide form and washed with 200 ml of distilled water. Bound material is eluted using a 0-400 mM gradient of triethylammonium bicarbonate (TEAB) buffer with 10 ml fractions being collected. Elution of compound 2 containing product is monitored by a ultraviolet flow through device. Fractions collected containing the UV absorbance is evaporated to dryness over four co-evaporations with methanol/water to remove TEAB. The resulting material is compound 110. The purity is checked with thin layered chromatography on PEI cellulose matrix developed with 0.4M ammonium bicarbonate solution.
Compound 109 (0.300 gm, 1 mmol) is dissolved in 10 ml of Dimethyl formamide and 5 ml of water is added to the mixture.
L-cysteine (0.50 gm) is added to the mixture and stirred till it dissolved. The reaction mixture is purged with nitrogen and stirred for 30 minutes. 1 ml of 5% Hydrogen peroxide is added to it and the reaction stirred for approximately 24 hours at room temperature with regular monitoring using thin layer chromatography. The reaction mixture loaded onto a DEAE cellulose column (2 cm×20 cm long) in the hydroxide form and washed with 200 ml of distilled water. Bound material is eluted using a 0-400 mM gradient of triethylammonium bicarbonate (TEAB) buffer with 10 ml fractions being collected. Elution of compound 2 containing product is monitored by a ultraviolet flow through device. Fractions collected containing the UV absorbance is evaporated to dryness over four co-evaporations with methanol/water to remove TEAB. The resulting material is compound 111. The purity is checked with thin layered chromatography on PEI cellulose matrix developed with 0.4M ammonium bicarbonate solution.
Chelidonic acid (1.84 g, 10 mmol) is taken in a 100 ml round bottomed flask. Methylene chloride (50 ml) is added to the flask. Oxalyl chloride (2.52 gm, 20 mmol) is added to the flask. The system is flushed with nitrogen and stirred for 24 hours. The reaction mixture may be warmed if the progress is slow. The progress is monitored using thin layer chromatography. The resulting acid chloride is used in the next step.
L-cysteine hydrochloride ethyl ester (2.825 gm, 25 mmol) is dissolved in a 100 ml round bottomed flask and Methylene chloride (50 ml) is added to it and stirred. Triethylamine (3.1 gm, 30 mmol) is added to it drop by drop under constant stirring. Once all the L-cysteine hydrochloride ethyl ester has dissolved the acid chloride generated in the earlier step is added to the reaction mixture drop wise. Triethylamine (5.15 gm, 50 mmol) is added to the mixture and the stirring continued for around 12 hours. The reaction progress is monitored using thin layered chromatography. The reaction is quenched by adding d.i water (15 ml). The mixture is separated on a separatory column. The organic layer is collected and washed three times with d.i water (15 ml×3). The layer is evaporated to collect the crude product. The crude product is purified on a silica column to obtain compound 112.
Compound 112 (0.444 gm, 1 mmol) is dissolved in 10 ml of Dimethyl formamide and 5 ml of water is added to the mixture. Glutathione (0.76 gm) is added to the mixture and stirred till it dissolved. The reaction mixture is purged with nitrogen and stirred for 30 minutes. 1 ml of 5% Hydrogen peroxide is added to it and the reaction stirred for approximately 24 hours at room temperature with regular monitoring using thin layer chromatography. The reaction mixture loaded onto a DEAE cellulose column (2 cm×20 cm long) in the hydroxide form and washed with 200 ml of distilled water. Bound material is eluted using a 0-400 mM gradient of triethylammonium bicarbonate (TEAB) buffer with 10 ml fractions being collected. Elution of compound 2 containing product is monitored by a ultraviolet flow through device. Fractions collected containing the UV absorbance is evaporated to dryness over four co-evaporations with methanol/water to remove TEAB. The resulting material is Compound 113. The purity is checked with thin layered chromatography on PEI cellulose matrix developed with 0.4M ammonium bicarbonate solution.
Compound 112 (0.444 gm, 1 mmol) is dissolved in 10 ml of Dimethyl formamide and 5 ml of water is added to the mixture.
L-cysteine (0.50 gm) is added to the mixture and stirred till it dissolved. The reaction mixture is purged with nitrogen and stirred for 30 minutes. 1 ml of 5% Hydrogen peroxide is added to it and the reaction stirred for approximately 24 hours at room temperature with regular monitoring using thin layer chromatography. The reaction mixture loaded onto a DEAE cellulose column (2 cm×20 cm long) in the hydroxide form and washed with 200 ml of distilled water. Bound material is eluted using a 0-400 mM gradient of triethylammonium bicarbonate (TEAB) buffer with 10 ml fractions being collected. Elution of compound 2 containing product is monitored by a ultraviolet flow through device. Fractions collected containing the UV absorbance is evaporated to dryness over four co-evaporations with methanol/water to remove TEAB. The resulting material is compound 114. The purity is checked with thin layered chromatography on PEI cellulose matrix developed with 0.4M ammonium bicarbonate solution.
Chelidonic acid (1.84 g, 10 mmol) is taken in a 100 ml round bottomed flask. Methylene chloride (50 ml) is added to the flask. Oxalyl chloride (2.52 gm, 20 mmol) is added to the flask. The system is flushed with nitrogen and stirred for 24 hours. The reaction mixture may be warmed if the progress is slow. The progress is monitored using thin layer chromatography. The resulting acid chloride is used in the next step.
L-cysteine hydrochloride methyl ester (2.625 gm, 25 mmol) is dissolved in a 100 ml round bottomed flask and Methylene chloride (50 ml) is added to it and stirred. Triethylamine (3.1 gm, 30 mmol) is added to it drop by drop under constant stirring. Once all the L-cysteine hydrochloride methyl ester has dissolved the acid chloride generated in the earlier step is added to the reaction mixture drop wise. Triethylamine (5.15 gm, 50 mmol) is added to the mixture and the stirring continued for around 12 hours. The reaction progress is monitored using thin layered chromatography. The reaction is quenched by adding water (15 ml). The mixture is separated on a separatory column. The organic layer is collected and washed three times with d.i water (15 ml×3). The layer is evaporated to collect the crude product. The crude product is purified on a silica column to obtain compound 115.
Compound 115 (0.416 gm, 1 mmol) is dissolved in 10 ml of Dimethyl formamide and 5 ml of water is added to the mixture. Glutathione (0.76 gm) is added to the mixture and stirred till it dissolved. The reaction mixture is purged with nitrogen and stirred for 30 minutes. 1 ml of 5% Hydrogen peroxide is added to it and the reaction stirred for approximately 24 hours at room temperature with regular monitoring using thin layer chromatography. The reaction mixture loaded onto a DEAE cellulose column (2 cm×20 cm long) in the hydroxide form and washed with 200 ml of distilled water. Bound material is eluted using a 0-400 mM gradient of triethylammonium bicarbonate (TEAB) buffer with 10 ml fractions being collected. Elution of compound 2 containing product is monitored by a ultraviolet flow through device. Fractions collected containing the UV absorbance is evaporated to dryness over four co-evaporations with methanol/water to remove TEAB. The resulting material is Compound 116. The purity is checked with thin layered chromatography on PEI cellulose matrix developed with 0.4M ammonium bicarbonate solution.
Compound 115. (0.416 gm, 1 mmol) is dissolved in 10 ml of Dimethyl formamide and 5 ml of water is added to the mixture.
L-cysteine (0.50 gm) is added to the mixture and stirred till it dissolved. The reaction mixture is purged with nitrogen and stirred for 30 minutes. 1 ml of 5% Hydrogen peroxide is added to it and the reaction stirred for approximately 24 hours at room temperature with regular monitoring using thin layer chromatography. The reaction mixture loaded onto a DEAE cellulose column (2 cm×20 cm long) in the hydroxide form and washed with 200 ml of distilled water. Bound material is eluted using a 0-400 mM gradient of triethylammonium bicarbonate (TEAB) buffer with 10 ml fractions being collected. Elution of compound 2 containing product is monitored by a ultraviolet flow through device. Fractions collected containing the UV absorbance is evaporated to dryness over four co-evaporations with methanol/water to remove TEAB. The resulting material is compound 117. The purity is
Compounds 118-126
Starting Material: Terephthaloyl dichloride. Aldrich Cat #120871 Mol wt: 203.02
Cysteamine hydrochloride (2.825 gm, 25 mmol) is dissolved in a 100 ml round bottomed flask and chloroform (50 ml) is added to it and stirred. Triethylamine (3.1 gm, 30 mmol) is added to it drop by drop under constant stirring. Once all the cysteamine hydrochloride has dissolved terephthaloyl dichloride (2.03 g, 10 mmol) dissolved in 20 ml chloroform is added to the reaction mixture drop wise. Triethylamine (5.15 gm, 50 mmol) is added to the mixture and the stirring continued for around 12 hours. The reaction progress is monitored using thin layered chromatography. The reaction is quenched by adding water (15 ml). The mixture is separated on a separatory column. The organic layer is collected and washed three times with d.i water (15 ml×3). The layer is evaporated to collect the crude product. The crude product is purified on a silica column to obtain compound 118.
Compound 118 (0.284 gm, 1 mmol) is dissolved in 10 ml of Dimethyl formamide and 5 ml of water is added to the mixture. Glutathione (0.76 gm) is added to the mixture and stirred till it dissolved. The reaction mixture is purged with nitrogen and stirred for 30 minutes. 1 ml of 5% Hydrogen peroxide is added to it and the reaction stirred for approximately 24 hours at room temperature with regular monitoring using thin layer chromatography. The reaction mixture loaded onto a DEAE cellulose column (2 cm×20 cm long) in the hydroxide form and washed with 200 ml of distilled water. Bound material is eluted using a 0-400 mM gradient of triethylammonium bicarbonate (TEAB) buffer with 10 ml fractions being collected. Elution of compound 2 containing product is monitored by a ultraviolet flow through device. Fractions collected containing the UV absorbance is evaporated to dryness over four co-evaporations with methanol/water to remove TEAB. The resulting material is compound 129. The purity is checked with thin layered chromatography on PEI cellulose matrix developed with 0.4M ammonium bicarbonate solution.
Compound 118 (0.284 gm, 1 mmol) is dissolved in 10 ml of Dimethyl formamide and 5 ml of water is added to the mixture.
L-cysteine (0.50 gm) is added to the mixture and stirred till it dissolved. The reaction mixture is purged with nitrogen and stirred for 30 minutes. 1 ml of 5% Hydrogen peroxide is added to it and the reaction stirred for approximately 24 hours at room temperature with regular monitoring using thin layer chromatography. The reaction mixture loaded onto a DEAE cellulose column (2 cm×20 cm long) in the hydroxide form and washed with 200 ml of distilled water. Bound material is eluted using a 0-400 mM gradient of triethylammonium bicarbonate (TEAB) buffer with 10 ml fractions being collected. Elution of compound 2 containing product is monitored by a ultraviolet flow through device. Fractions collected containing the UV absorbance is evaporated to dryness over four co-evaporations with methanol/water to remove TEAB. The resulting material is compound 120. The purity is checked with thin layered chromatography on PEI cellulose matrix developed with 0.4M ammonium bicarbonate solution.
L-cysteine hydrochloride ethyl ester (2.825 gm, 25 mmol) is dissolved in a 100 ml round bottomed flask and chloroform (50 ml) is added to it and stirred. Triethylamine (3.1 gm, 30 mmol) is added to it drop by drop under constant stirring. Once all the L-cysteine hydrochloride ethyl ester has dissolved terephthaloyl dichloride (2.03 g, 10 mmol) dissolved in 20 ml chloroform is added to the reaction mixture drop wise. Triethylamine (5.15 gm, 50 mmol) is added to the mixture and the stirring continued for around 12 hours. The reaction progress is monitored using thin layered chromatography. The reaction is quenched by adding d.i water (15 ml). The mixture is separated on a separatory column. The organic layer is collected and washed three times with d.i water (15 ml×3). The layer is evaporated to collect the crude product. The crude product is purified on a silica column to obtain compound 121.
Compound 121 (0.428 gm, 1 mmol) is dissolved in 10 ml of Dimethyl formamide and 5 ml of water is added to the mixture. Glutathione (0.76 gm) is added to the mixture and stirred till it dissolved. The reaction mixture is purged with nitrogen and stirred for 30 minutes. 1 ml of 5% Hydrogen peroxide is added to it and the reaction stirred for approximately 24 hours at room temperature with regular monitoring using thin layer chromatography. The reaction mixture loaded onto a DEAE cellulose column (2 cm×20 cm long) in the hydroxide form and washed with 200 ml of distilled water. Bound material is eluted using a 0-400 mM gradient of triethylammonium bicarbonate (TEAB) buffer with 10 ml fractions being collected. Elution of compound 2 containing product is monitored by a ultraviolet flow through device. Fractions collected containing the UV absorbance is evaporated to dryness over four co-evaporations with methanol/water to remove TEAB. The resulting material is Compound 122. The purity is checked with thin layered chromatography on PEI cellulose matrix developed with 0.4M ammonium bicarbonate solution.
Compound 121 (0.469 gm, 1 mmol) is dissolved in 10 ml of Dimethyl formamide and 5 ml of water is added to the mixture.
L-cysteine (0.50 gm) is added to the mixture and stirred till it dissolved. The reaction mixture is purged with nitrogen and stirred for 30 minutes. 1 ml of 5% Hydrogen peroxide is added to it and the reaction stirred for approximately 24 hours at room temperature with regular monitoring using thin layer chromatography. The reaction mixture loaded onto a DEAE cellulose column (2 cm×20 cm long) in the hydroxide form and washed with 200 ml of distilled water. Bound material is eluted using a 0-400 mM gradient of triethylammonium bicarbonate (TEAB) buffer with 10 ml fractions being collected. Elution of compound 2 containing product is monitored by a ultraviolet flow through device. Fractions collected containing the UV absorbance is evaporated to dryness over four co-evaporations with methanol/water to remove TEAB. The resulting material is compound 123. The purity is
L-cysteine hydrochloride methyl ester (2.625 gm, 25 mmol) is dissolved in a 100 ml round bottomed flask and Methylene chloride (50 ml) is added to it and stirred. Triethylamine (3.1 gm, 30 mmol) is added to it drop by drop under constant stirring. Once all the L-cysteine hydrochloride methyl ester has dissolved terephthaloyl dichloride (2.03 g, 10 mmol) dissolved in 20 ml chloroform is added to the reaction mixture drop wise. Triethylamine (5.15 gm, 50 mmol) is added to the mixture and the stirring continued for around 12 hours. The reaction progress is monitored using thin layered chromatography. The reaction is quenched by adding water (15 ml). The mixture is separated on a separatory column. The organic layer is collected and washed three times with d.i water (15 ml×3). The layer is evaporated to collect the crude product. The crude product is purified on a silica column to obtain compound 124.
Compound 124 (0.400 gm, 1 mmol) is dissolved in 10 ml of Dimethyl formamide and 5 ml of water is added to the mixture. Glutathione (0.76 gm) is added to the mixture and stirred till it dissolved. The reaction mixture is purged with nitrogen and stirred for 30 minutes. 1 ml of 5% Hydrogen peroxide is added to it and the reaction stirred for approximately 24 hours at room temperature with regular monitoring using thin layer chromatography. The reaction mixture loaded onto a DEAE cellulose column (2 cm×20 cm long) in the hydroxide form and washed with 200 ml of distilled water. Bound material is eluted using a 0-400 mM gradient of triethylammonium bicarbonate (TEAB) buffer with 10 ml fractions being collected. Elution of compound 2 containing product is monitored by a ultraviolet flow through device. Fractions collected containing the UV absorbance is evaporated to dryness over four co-evaporations with methanol/water to remove TEAB. The resulting material is Compound 125. The purity is checked with thin layered chromatography on PEI cellulose matrix developed with 0.4M ammonium bicarbonate solution.
Compound 124 (0.400 gm, 1 mmol) is dissolved in 10 ml of Dimethyl formamide and 5 ml of water is added to the mixture.
L-cysteine (0.50 gm) is added to the mixture and stirred till it dissolved. The reaction mixture is purged with nitrogen and stirred for 30 minutes. 1 ml of 5% Hydrogen peroxide is added to it and the reaction stirred for approximately 24 hours at room temperature with regular monitoring using thin layer chromatography. The reaction mixture loaded onto a DEAE cellulose column (2 cm×20 cm long) in the hydroxide form and washed with 200 ml of distilled water. Bound material is eluted using a 0-400 mM gradient of triethylammonium bicarbonate (TEAB) buffer with 10 ml fractions being collected. Elution of compound 2 containing product is monitored by a ultraviolet flow through device. Fractions collected containing the UV absorbance is evaporated to dryness over four co-evaporations with methanol/water to remove TEAB. The resulting material is compound 126. The purity is checked with thin layered chromatography on PEI cellulose matrix developed with 0.4M ammonium bicarbonate solution.
Compounds 127-135
Starting Material: Homophthalic acid. Aldrich Catalog number: P-63603. M.W: 180.16
Homophthalic acid (1.80 g, 10 mmol) is taken in a 100 ml round bottomed flask. Methylene chloride (50 ml) is added to the flask. Oxalyl chloride (2.52 gm, 20 mmol) is added to the flask. The system is flushed with nitrogen and stirred for 24 hours. The reaction mixture may be warmed or refluxed if the progress is slow. The progress is monitored using thin layer chromatography. The resulting acid chloride is used in the next step.
Cysteamine hydrochloride (2.825 gm, 25 mmol) is dissolved in a 100 ml round bottomed flask and Methylene chloride (50 ml) is added to it and stirred. Triethylamine (3.1 gm, 30 mmol) is added to it drop by drop under constant stirring. Once all the cysteamine hydrochloride has dissolved the acid chloride generated in the earlier step is added to the reaction mixture drop wise. Triethylamine (5.15 gm, 50 mmol) is added to the mixture and the stirring continued for around 12 hours. The reaction progress is monitored using thin layered chromatography. The reaction is quenched by adding water (15 ml). The mixture is separated on a separatory column. The organic layer is collected and washed three times with d.i water (15 ml×3). The layer is evaporated to collect the crude product. The crude product is purified on a silica column to obtain compound 127.
Compound 127 (0.298 gm, 1 mmol) is dissolved in 10 ml of Dimethyl formamide and 5 ml of water is added to the mixture. Glutathione (0.76 gm) is added to the mixture and stirred till it dissolved. The reaction mixture is purged with nitrogen and stirred for 30 minutes. 1 ml of 5% Hydrogen peroxide is added to it and the reaction stirred for approximately 24 hours at room temperature with regular monitoring using thin layer chromatography. The reaction mixture loaded onto a DEAE cellulose column (2 cm×20 cm long) in the hydroxide form and washed with 200 ml of distilled water. Bound material is eluted using a 0-400 mM gradient of triethylammonium bicarbonate (TEAB) buffer with 10 ml fractions being collected. Elution of compound 2 containing product is monitored by a ultraviolet flow through device. Fractions collected containing the UV absorbance is evaporated to dryness over four co-evaporations with methanol/water to remove TEAB. The resulting material is compound 128. The purity is checked with thin layered chromatography on PEI cellulose matrix developed with 0.4M ammonium bicarbonate solution.
Compound 127 (0.298 gm, 1 mmol) is dissolved in 10 ml of Dimethyl formamide and 5 ml of water is added to the mixture.
L-cysteine (0.50 gm) is added to the mixture and stirred till it dissolved. The reaction mixture is purged with nitrogen and stirred for 30 minutes. 1 ml of 5% Hydrogen peroxide is added to it and the reaction stirred for approximately 24 hours at room temperature with regular monitoring using thin layer chromatography. The reaction mixture loaded onto a DEAE cellulose column (2 cm×20 cm long) in the hydroxide form and washed with 200 ml of distilled water. Bound material is eluted using a 0-400 mM gradient of triethylammonium bicarbonate (TEAB) buffer with 10 ml fractions being collected. Elution of compound 2 containing product is monitored by a ultraviolet flow through device. Fractions collected containing the UV absorbance is evaporated to dryness over four co-evaporations with methanol/water to remove TEAB. The resulting material is Compound 129. The purity is
Homophthalic acid (1.80 g, 10 mmol) is taken in a 100 ml round bottomed flask. Methylene chloride (50 ml) is added to the flask. Oxalyl chloride (2.52 gm, 20 mmol) is added to the flask. The system is flushed with nitrogen and stirred for 24 hours. The reaction mixture may be warmed or refluxed if the progress is slow. The progress is monitored using thin layer chromatography. The resulting acid chloride is used in the next step.
L-cysteine hydrochloride ethyl ester (2.825 gm, 25 mmol) is dissolved in a 100 ml round bottomed flask and Methylene chloride (50 ml) is added to it and stirred. Triethylamine (3.1 gm, 30 mmol) is added to it drop by drop under constant stirring. Once all the L-cysteine hydrochloride ethyl ester has dissolved the acid chloride generated in the earlier step is added to the reaction mixture drop wise. Triethylamine (5.15 gm, 50 mmol) is added to the mixture and the stirring continued for around 12 hours. The reaction progress is monitored using thin layered chromatography. The reaction is quenched by adding d.i water (15 ml). The mixture is separated on a separatory column. The organic layer is collected and washed three times with d.i water (15 ml×3). The layer is evaporated to collect the crude product. The crude product is purified on a silica column to obtain compound 130.
Compound 130 (0.442 gm, 1 mmol) is dissolved in 10 ml of Dimethyl formamide and 5 ml of water is added to the mixture. Glutathione (0.76 gm) is added to the mixture and stirred till it dissolved. The reaction mixture is purged with nitrogen and stirred for 30 minutes. 1 ml of 5% Hydrogen peroxide is added to it and the reaction stirred for approximately 24 hours at room temperature with regular monitoring using thin layer chromatography. The reaction mixture loaded onto a DEAE cellulose column (2 cm×20 cm long) in the hydroxide form and washed with 200 ml of distilled water. Bound material is eluted using a 0-400 mM gradient of triethylammonium bicarbonate (TEAB) buffer with 10 ml fractions being collected. Elution of compound 2 containing product is monitored by a ultraviolet flow through device. Fractions collected containing the UV absorbance is evaporated to dryness over four co-evaporations with methanol/water to remove TEAB. The resulting material is Compound 131. The purity is checked with thin layered chromatography on PEI cellulose matrix developed with 0.4M ammonium bicarbonate solution.
Compound 130 (0.442 gm, 1 mmol) is dissolved in 10 ml of Dimethyl formamide and 5 ml of water is added to the mixture.
L-cysteine (0.50 gm) is added to the mixture and stirred till it dissolved. The reaction mixture is purged with nitrogen and stirred for 30 minutes. 1 ml of 5% Hydrogen peroxide is added to it and the reaction stirred for approximately 24 hours at room temperature with regular monitoring using thin layer chromatography. The reaction mixture loaded onto a DEAE cellulose column (2 cm×20 cm long) in the hydroxide form and washed with 200 ml of distilled water. Bound material is eluted using a 0-400 mM gradient of triethylammonium bicarbonate (TEAB) buffer with 10 ml fractions being collected. Elution of compound 2 containing product is monitored by a ultraviolet flow through device. Fractions collected containing the UV absorbance is evaporated to dryness over four co-evaporations with methanol/water to remove TEAB. The resulting material is compound 132. The purity is
Homophthalic acid (1.80 g, 10 mmol) is taken in a 100 ml round bottomed flask. Methylene chloride (50 ml) is added to the flask. Oxalyl chloride (2.52 gm, 20 mmol) is added to the flask. The system is flushed with nitrogen and stirred for 24 hours. The reaction mixture may be warmed or refluxed if the progress is slow. The progress is monitored using thin layer chromatography. The resulting acid chloride is used in the next step.
L-cysteine hydrochloride methyl ester (2.625 gm, 25 mmol) is dissolved in a 100 ml round bottomed flask and Methylene chloride (50 ml) is added to it and stirred. Triethylamine (3.1 gm, 30 mmol) is added to it drop by drop under constant stirring. Once all the L-cysteine hydrochloride methyl ester has dissolved the acid chloride generated in the earlier step is added to the reaction mixture drop wise. Triethylamine (5.15 gm, 50 mmol) is added to the mixture and the stirring continued for around 12 hours. The reaction progress is monitored using thin layered chromatography. The reaction is quenched by adding water (15 ml). The mixture is separated on a separatory column. The organic layer is collected and washed three times with d.i water (15 ml×3). The layer is evaporated to collect the crude product. The crude product is purified on a silica column to obtain compound 133.
Compound 133 (0.414 gm, 1 mmol) is dissolved in 10 ml of Dimethyl formamide and 5 ml of water is added to the mixture. Glutathione (0.76 gm) is added to the mixture and stirred till it dissolved. The reaction mixture is purged with nitrogen and stirred for 30 minutes. 1 ml of 5% Hydrogen peroxide is added to it and the reaction stirred for approximately 24 hours at room temperature with regular monitoring using thin layer chromatography. The reaction mixture loaded onto a DEAE cellulose column (2 cm×20 cm long) in the hydroxide form and washed with 200 ml of distilled water. Bound material is eluted using a 0-400 mM gradient of triethylammonium bicarbonate (TEAB) buffer with 10 ml fractions being collected. Elution of compound 2 containing product is monitored by a ultraviolet flow through device. Fractions collected containing the UV absorbance is evaporated to dryness over four co-evaporations with methanol/water to remove TEAB. The resulting material is Compound 134. The purity is checked with thin layered chromatography on PEI cellulose matrix developed with 0.4M ammonium bicarbonate solution.
Compound 133 (0.414 gm, 1 mmol) is dissolved in 10 ml of Dimethyl formamide and 5 ml of water is added to the mixture.
L-cysteine (0.50 gm) is added to the mixture and stirred till it dissolved. The reaction mixture is purged with nitrogen and stirred for 30 minutes. 1 ml of 5% Hydrogen peroxide is added to it and the reaction stirred for approximately 24 hours at room temperature with regular monitoring using thin layer chromatography. The reaction mixture loaded onto a DEAE cellulose column (2 cm×20 cm long) in the hydroxide form and washed with 200 ml of distilled water. Bound material is eluted using a 0-400 mM gradient of triethylammonium bicarbonate (TEAB) buffer with 10 ml fractions being collected. Elution of compound 2 containing product is monitored by a ultraviolet flow through device. Fractions collected containing the UV absorbance is evaporated to dryness over four co-evaporations with methanol/water to remove TEAB. The resulting material is compound 135. The purity is checked with thin layered chromatography on PEI cellulose matrix developed with 0.4M ammonium bicarbonate solution.
Compounds: 136-144
Starting Material: 1-Benzyl-1H-pyrazole-3,5-dicarboxylic acid. Aldrich Catalog number: S 457000. M.W: 342.35
1-Benzyl-1H-pyrazole-3,5-dicarboxylic acid (3.42 g, 10 mmol) is taken in a 100 ml round bottomed flask. Methylene chloride (50 ml) is added to the flask. Oxalyl chloride (2.52 gm, 20 mmol) is added to the flask. The system is flushed with nitrogen and stirred for 24 hours. The reaction mixture may be warmed or refluxed if the progress is slow. The progress is monitored using thin layer chromatography. The resulting acid chloride is used in the next step.
Cysteamine hydrochloride (2.825 gm, 25 mmol) is dissolved in a 100 ml round bottomed flask and Methylene chloride (50 ml) is added to it and stirred. Triethylamine (3.1 gm, 30 mmol) is added to it drop by drop under constant stirring. Once all the cysteamine hydrochloride has dissolved the acid chloride generated in the earlier step is added to the reaction mixture drop wise. Triethylamine (5.15 gm, 50 mmol) is added to the mixture and the stirring continued for around 12 hours. The reaction progress is monitored using thin layered chromatography. The reaction is quenched by adding water (15 ml). The mixture is separated on a separatory column. The organic layer is collected and washed three times with d.i water (15 ml×3). The layer is evaporated to collect the crude product. The crude product is purified on a silica column to obtain compound 136.
Compound 136 (0.38 gm, 1 mmol) is dissolved in 10 ml of Dimethyl formamide and 5 ml of water is added to the mixture. Glutathione (0.76 gm) is added to the mixture and stirred till it dissolved. The reaction mixture is purged with nitrogen and stirred for 30 minutes. 1 ml of 5% Hydrogen peroxide is added to it and the reaction stirred for approximately 24 hours at room temperature with regular monitoring using thin layer chromatography. The reaction mixture loaded onto a DEAE cellulose column (2 cm×20 cm long) in the hydroxide form and washed with 200 ml of distilled water. Bound material is eluted using a 0-400 mM gradient of triethylammonium bicarbonate (TEAB) buffer with 10 ml fractions being collected. Elution of compound 2 containing product is monitored by a ultraviolet flow through device. Fractions collected containing the UV absorbance is evaporated to dryness over four co-evaporations with methanol/water to remove TEAB. The resulting material is compound 137. The purity is checked with thin layered chromatography on PEI cellulose matrix developed with 0.4M ammonium bicarbonate solution.
Compound 136 (0.38 gm, 1 mmol) is dissolved in 10 ml of Dimethyl formamide and 5 ml of water is added to the mixture.
L-cysteine (0.50 gm) is added to the mixture and stirred till it dissolved. The reaction mixture is purged with nitrogen and stirred for 30 minutes. 1 ml of 5% Hydrogen peroxide is added to it and the reaction stirred for approximately 24 hours at room temperature with regular monitoring using thin layer chromatography. The reaction mixture loaded onto a DEAE cellulose column (2 cm×20 cm long) in the hydroxide form and washed with 200 ml of distilled water. Bound material is eluted using a 0-400 mM gradient of triethylammonium bicarbonate (TEAB) buffer with 10 ml fractions being collected. Elution of compound 2 containing product is monitored by a ultraviolet flow through device. Fractions collected containing the UV absorbance is evaporated to dryness over four co-evaporations with methanol/water to remove TEAB. The resulting material is compound 138. The purity is
1-Benzyl-1H-pyrazole-3,5-dicarboxylic acid (3.42 g, 10 mmol) is taken in a 100 ml round bottomed flask. Methylene chloride (50 ml) is added to the flask. Oxalyl chloride (2.52 gm, 20 mmol) is added to the flask. The system is flushed with nitrogen and stirred for 24 hours. The reaction mixture may be warmed if the progress is slow. The progress is monitored using thin layer chromatography. The resulting acid chloride is used in the next step.
L-cysteine hydrochloride ethyl ester (2.825 gm, 25 mmol) is dissolved in a 100 ml round bottomed flask and Methylene chloride (50 ml) is added to it and stirred. Triethylamine (3.1 gm, 30 mmol) is added to it drop by drop under constant stirring. Once all the L-cysteine hydrochloride ethyl ester has dissolved the acid chloride generated in the earlier step is added to the reaction mixture drop wise. Triethylamine (5.15 gm, 50 mmol) is added to the mixture and the stirring continued for around 12 hours. The reaction progress is monitored using thin layered chromatography. The reaction is quenched by adding d.i water (15 ml). The mixture is separated on a separatory column. The organic layer is collected and washed three times with d.i water (15 ml×3). The layer is evaporated to collect the crude product. The crude product is purified on a silica column to obtain compound 139.
Compound 139 (0.524 gm, 1 mmol) is dissolved in 10 ml of Dimethyl formamide and 5 ml of water is added to the mixture. Glutathione (0.76 gm) is added to the mixture and stirred till it dissolved. The reaction mixture is purged with nitrogen and stirred for 30 minutes. 1 ml of 5% Hydrogen peroxide is added to it and the reaction stirred for approximately 24 hours at room temperature with regular monitoring using thin layer chromatography. The reaction mixture loaded onto a DEAE cellulose column (2 cm×20 cm long) in the hydroxide form and washed with 200 ml of distilled water. Bound material is eluted using a 0-400 mM gradient of triethylammonium bicarbonate (TEAB) buffer with 10 ml fractions being collected. Elution of compound 2 containing product is monitored by a ultraviolet flow through device. Fractions collected containing the UV absorbance is evaporated to dryness over four co-evaporations with methanol/water to remove TEAB. The resulting material is Compound 140. The purity is checked with thin layered chromatography on PEI cellulose matrix developed with 0.4M ammonium bicarbonate solution.
Compound 139 (0.524 gm, 1 mmol) is dissolved in 10 ml of Dimethyl formamide and 5 ml of water is added to the mixture.
L-cysteine (0.50 gm) is added to the mixture and stirred till it dissolved. The reaction mixture is purged with nitrogen and stirred for 30 minutes. 1 ml of 5% Hydrogen peroxide is added to it and the reaction stirred for approximately 24 hours at room temperature with regular monitoring using thin layer chromatography. The reaction mixture loaded onto a DEAE cellulose column (2 cm×20 cm long) in the hydroxide form and washed with 200 ml of distilled water. Bound material is eluted using a 0-400 mM gradient of triethylammonium bicarbonate (TEAB) buffer with 10 ml fractions being collected. Elution of compound 2 containing product is monitored by a ultraviolet flow through device. Fractions collected containing the UV absorbance is evaporated to dryness over four co-evaporations with methanol/water to remove TEAB. The resulting material is compound 141. The purity is checked with thin layered chromatography on PEI cellulose matrix developed with 0.4M ammonium bicarbonate solution.
1-Benzyl-1H-pyrazole-3,5-dicarboxylic acid (3.42 g, 10 mmol) is taken in a 100 ml round bottomed flask. Methylene chloride (50 ml) is added to the flask. Oxalyl chloride (2.52 gm, 20 mmol) is added to the flask. The system is flushed with nitrogen and stirred for 24 hours. The reaction mixture may be warmed if the progress is slow. The progress is monitored using thin layer chromatography. The resulting acid chloride is used in the next step.
L-cysteine hydrochloride methyl ester (2.625 gm, 25 mmol) is dissolved in a 100 ml round bottomed flask and Methylene chloride (50 ml) is added to it and stirred. Triethylamine (3.1 gm, 30 mmol) is added to it drop by drop under constant stirring. Once all the L-cysteine hydrochloride methyl ester has dissolved the acid chloride generated in the earlier step is added to the reaction mixture drop wise. Triethylamine (5.15 gm, 50 mmol) is added to the mixture and the stirring continued for around 12 hours. The reaction progress is monitored using thin layered chromatography. The reaction is quenched by adding water (15 ml). The mixture is separated on a separatory column. The organic layer is collected and washed three times with d.i water (15 ml×3). The layer is evaporated to collect the crude product. The crude product is purified on a silica column to obtain compound 142.
Compound 142 (0.496 gm, 1 mmol) is dissolved in 10 ml of Dimethyl formamide and 5 ml of water is added to the mixture. Glutathione (0.76 gm) is added to the mixture and stirred till it dissolved. The reaction mixture is purged with nitrogen and stirred for 30 minutes. 1 ml of 5% Hydrogen peroxide is added to it and the reaction stirred for approximately 24 hours at room temperature with regular monitoring using thin layer chromatography. The reaction mixture loaded onto a DEAE cellulose column (2 cm×20 cm long) in the hydroxide form and washed with 200 ml of distilled water. Bound material is eluted using a 0-400 mM gradient of triethylammonium bicarbonate (TEAB) buffer with 10 ml fractions being collected. Elution of compound 2 containing product is monitored by a ultraviolet flow through device. Fractions collected containing the UV absorbance is evaporated to dryness over four co-evaporations with methanol/water to remove TEAB. The resulting material is Compound 143. The purity is checked with thin layered chromatography on PEI cellulose matrix developed with 0.4M ammonium bicarbonate solution.
Compound 142 (0.42 gm, 1 mmol) is dissolved in 10 ml of Dimethyl formamide and 5 ml of water is added to the mixture.
L-cysteine (0.50 gm) is added to the mixture and stirred till it dissolved. The reaction mixture is purged with nitrogen and stirred for 30 minutes. 1 ml of 5% Hydrogen peroxide is added to it and the reaction stirred for approximately 24 hours at room temperature with regular monitoring using thin layer chromatography. The reaction mixture loaded onto a DEAE cellulose column (2 cm×20 cm long) in the hydroxide form and washed with 200 ml of distilled water. Bound material is eluted using a 0-400 mM gradient of triethylammonium bicarbonate (TEAB) buffer with 10 ml fractions being collected. Elution of compound 2 containing product is monitored by a ultraviolet flow through device. Fractions collected containing the UV absorbance is evaporated to dryness over four co-evaporations with methanol/water to remove TEAB. The resulting material is compound 144. The purity is checked with thin layered chromatography on PEI cellulose matrix developed with 0.4M ammonium bicarbonate solution.
Compounds 145-153
Starting Material: 4-phenyl-pyridine-2,5-dicarboxylic acid. Aldrich Catalog number: 3-95889. M.W: 243.22
4-phenyl-pyridine-2,5-dicarboxylic acid (2.43 g, 10 mmol) is taken in a 100 ml round bottomed flask. Methylene chloride (50 ml) is added to the flask. Oxalyl chloride (2.52 gm, 20 mmol) is added to the flask. The system is flushed with nitrogen and stirred for 24 hours. The reaction mixture may be warmed or refluxed if the progress is slow. The progress is monitored using thin layer chromatography. The resulting acid chloride is used in the next step.
Cysteamine hydrochloride (2.825 gm, 25 mmol) is dissolved in a 100 ml round bottomed flask and Methylene chloride (50 ml) is added to it and stirred. Triethylamine (3.1 gm, 30 mmol) is added to it drop by drop under constant stirring. Once all the cysteamine hydrochloride has dissolved the acid chloride generated in the earlier step is added to the reaction mixture drop wise. Triethylamine (5.15 gm, 50 mmol) is added to the mixture and the stirring continued for around 12 hours. The reaction progress is monitored using thin layered chromatography. The reaction is quenched by adding water (15 ml). The mixture is separated on a separatory column. The organic layer is collected and washed three times with d.i water (15 ml×3). The layer is evaporated to collect the crude product. The crude product is purified on a silica column to obtain compound 145.
Compound 145 (0.361 gm, 1 mmol) is dissolved in 10 ml of Dimethyl formamide and 5 ml of water is added to the mixture. Glutathione (0.76 gm) is added to the mixture and stirred till it dissolved. The reaction mixture is purged with nitrogen and stirred for 30 minutes. 1 ml of 5% Hydrogen peroxide is added to it and the reaction stirred for approximately 24 hours at room temperature with regular monitoring using thin layer chromatography. The reaction mixture loaded onto a DEAE cellulose column (2 cm×20 cm long) in the hydroxide form and washed with 200 ml of distilled water. Bound material is eluted using a 0-400 mM gradient of triethylammonium bicarbonate (TEAB) buffer with 10 ml fractions being collected. Elution of compound 2 containing product is monitored by a ultraviolet flow through device. Fractions collected containing the UV absorbance is evaporated to dryness over four co-evaporations with methanol/water to remove TEAB. The resulting material is compound 146. The purity is checked with thin layered chromatography on PEI cellulose matrix developed with 0.4M ammonium bicarbonate solution.
Compound 145 (0.361 gm, 1 mmol) is dissolved in 10 ml of Dimethyl formamide and 5 ml of water is added to the mixture.
L-cysteine (0.50 gm) is added to the mixture and stirred till it dissolved. The reaction mixture is purged with nitrogen and stirred for 30 minutes. 1 ml of 5% Hydrogen peroxide is added to it and the reaction stirred for approximately 24 hours at room temperature with regular monitoring using thin layer chromatography. The reaction mixture loaded onto a DEAE cellulose column (2 cm×20 cm long) in the hydroxide form and washed with 200 ml of distilled water. Bound material is eluted using a 0-400 mM gradient of triethylammonium bicarbonate (TEAB) buffer with 10 ml fractions being collected. Elution of compound 2 containing product is monitored by a ultraviolet flow through device. Fractions collected containing the UV absorbance is evaporated to dryness over four co-evaporations with methanol/water to remove TEAB. The resulting material is Compound 147. The purity is checked with thin layered chromatography on PEI cellulose matrix developed with 0.4M ammonium bicarbonate solution.
4-phenyl-pyridine-2,5-dicarboxylic acid (2.43 g, 10 mmol) is taken in a 100 ml round bottomed flask. Methylene chloride (50 ml) is added to the flask. Oxalyl chloride (2.52 gm, 20 mmol) is added to the flask. The system is flushed with nitrogen and stirred for 24 hours. The reaction mixture may be warmed or refluxed if the progress is slow. The progress is monitored using thin layer chromatography. The resulting acid chloride is used in the next step.
L-cysteine hydrochloride ethyl ester (2.825 gm, 25 mmol) is dissolved in a 100 ml round bottomed flask and Methylene chloride (50 ml) is added to it and stirred. Triethylamine (3.1 gm, 30 mmol) is added to it drop by drop under constant stirring. Once all the L-cysteine hydrochloride ethyl ester has dissolved the acid chloride generated in the earlier step is added to the reaction mixture drop wise. Triethylamine (5.15 gm, 50 mmol) is added to the mixture and the stirring continued for around 12 hours. The reaction progress is monitored using thin layered chromatography. The reaction is quenched by adding d.i water (15 ml). The mixture is separated on a separatory column. The organic layer is collected and washed three times with d.i water (15 ml×3). The layer is evaporated to collect the crude product. The crude product is purified on a silica column to obtain compound 148.
Compound 148 (0.505 gm, 1 mmol) is dissolved in 10 ml of Dimethyl formamide and 5 ml of water is added to the mixture. Glutathione (0.76 gm) is added to the mixture and stirred till it dissolved. The reaction mixture is purged with nitrogen and stirred for 30 minutes. 1 ml of 5% Hydrogen peroxide is added to it and the reaction stirred for approximately 24 hours at room temperature with regular monitoring using thin layer chromatography. The reaction mixture loaded onto a DEAE cellulose column (2 cm×20 cm long) in the hydroxide form and washed with 200 ml of distilled water. Bound material is eluted using a 0-400 mM gradient of triethylammonium bicarbonate (TEAB) buffer with 10 ml fractions being collected. Elution of compound 2 containing product is monitored by a ultraviolet flow through device. Fractions collected containing the UV absorbance is evaporated to dryness over four co-evaporations with methanol/water to remove TEAB. The resulting material is Compound 149. The purity is checked with thin layered chromatography on PEI cellulose matrix developed with 0.4M ammonium bicarbonate solution.
Compound 148 (0.505 gm, 1 mmol) is dissolved in 10 ml of Dimethyl formamide and 5 ml of water is added to the mixture.
L-cysteine (0.50 gm) is added to the mixture and stirred till it dissolved. The reaction mixture is purged with nitrogen and stirred for 30 minutes. 1 ml of 5% Hydrogen peroxide is added to it and the reaction stirred for approximately 24 hours at room temperature with regular monitoring using thin layer chromatography. The reaction mixture loaded onto a DEAE cellulose column (2 cm×20 cm long) in the hydroxide form and washed with 200 ml of distilled water. Bound material is eluted using a 0-400 mM gradient of triethylammonium bicarbonate (TEAB) buffer with 10 ml fractions being collected. Elution of compound 2 containing product is monitored by a ultraviolet flow through device. Fractions collected containing the UV absorbance is evaporated to dryness over four co-evaporations with methanol/water to remove TEAB. The resulting material is compound 150. The purity is
4-phenyl-pyridine-2,5-dicarboxylic acid (2.43 g, 10 mmol) is taken in a 100 ml round bottomed flask. Methylene chloride (50 ml) is added to the flask. Oxalyl chloride (2.52 gm, 20 mmol) is added to the flask. The system is flushed with nitrogen and stirred for 24 hours. The reaction mixture may be warmed or refluxed if the progress is slow. The progress is monitored using thin layer chromatography. The resulting acid chloride is used in the next step.
L-cysteine hydrochloride methyl ester (2.625 gm, 25 mmol) is dissolved in a 100 ml round bottomed flask and Methylene chloride (50 ml) is added to it and stirred. Triethylamine (3.1 gm, 30 mmol) is added to it drop by drop under constant stirring. Once all the L-cysteine hydrochloride methyl ester has dissolved the acid chloride generated in the earlier step is added to the reaction mixture drop wise. Triethylamine (5.15 gm, 50 mmol) is added to the mixture and the stirring continued for around 12 hours. The reaction progress is monitored using thin layered chromatography. The reaction is quenched by adding water (15 ml). The mixture is separated on a separatory column. The organic layer is collected and washed three times with d.i water (15 ml×3). The layer is evaporated to collect the crude product. The crude product is purified on a silica column to obtain compound 151.
Compound 151 (0.477 gm, 1 mmol) is dissolved in 10 ml of Dimethyl formamide and 5 ml of water is added to the mixture. Glutathione (0.76 gm) is added to the mixture and stirred till it dissolved. The reaction mixture is purged with nitrogen and stirred for 30 minutes. 1 ml of 5% Hydrogen peroxide is added to it and the reaction stirred for approximately 24 hours at room temperature with regular monitoring using thin layer chromatography. The reaction mixture loaded onto a DEAE cellulose column (2 cm×20 cm long) in the hydroxide form and washed with 200 ml of distilled water. Bound material is eluted using a 0-400 mM gradient of triethylammonium bicarbonate (TEAB) buffer with 10 ml fractions being collected. Elution of compound 2 containing product is monitored by a ultraviolet flow through device. Fractions collected containing the UV absorbance is evaporated to dryness over four co-evaporations with methanol/water to remove TEAB. The resulting material is Compound 152. The purity is checked with thin layered chromatography on PEI cellulose matrix developed with 0.4M ammonium bicarbonate solution.
Compound 151 (0.477 gm, 1 mmol) is dissolved in 10 ml of Dimethyl formamide and 5 ml of water is added to the mixture.
L-cysteine (0.50 gm) is added to the mixture and stirred till it dissolved. The reaction mixture is purged with nitrogen and stirred for 30 minutes. 1 ml of 5% Hydrogen peroxide is added to it and the reaction stirred for approximately 24 hours at room temperature with regular monitoring using thin layer chromatography. The reaction mixture loaded onto a DEAE cellulose column (2 cm×20 cm long) in the hydroxide form and washed with 200 ml of distilled water. Bound material is eluted using a 0-400 mM gradient of triethylammonium bicarbonate (TEAB) buffer with 10 ml fractions being collected. Elution of compound 2 containing product is monitored by a ultraviolet flow through device. Fractions collected containing the UV absorbance is evaporated to dryness over four co-evaporations with methanol/water to remove TEAB. The resulting material is compound 153. The purity is checked with thin layered chromatography on PEI cellulose matrix developed with 0.4M ammonium bicarbonate solution.
Compounds: 154-162
Starting Material: Thiophene-2,5-dicarboxylic acid dimethyl ester. Aldrich Catalog number R 416584. M.W: 200.215
Thiophene-2,5-dicarboxylic acid dimethyl ester (2.00 g, 10 mmol) is taken in a 100 ml round bottomed flask. Methylene chloride (50 ml) is added to the flask. Oxalyl chloride (2.52 gm, 20 mmol) is added to the flask. The system is flushed with nitrogen and stirred for 24 hours. The reaction mixture may be warmed if the progress is slow. The progress is monitored using thin layer chromatography. The resulting acid chloride is used in the next step.
Cysteamine hydrochloride (2.825 gm, 25 mmol) is dissolved in a 100 ml round bottomed flask and Methylene chloride (50 ml) is added to it and stirred. Triethylamine (3.1 gm, 30 mmol) is added to it drop by drop under constant stirring. Once all the cysteamine hydrochloride has dissolved the acid chloride generated in the earlier step is added to the reaction mixture drop wise. Triethylamine (5.15 gm, 50 mmol) is added to the mixture and the stirring continued for around 12 hours. The reaction progress is monitored using thin layered chromatography. The reaction is quenched by adding water (15 ml). The mixture is separated on a separatory column. The organic layer is collected and washed three times with d.i water (15 ml×3). The layer is evaporated to collect the crude product. The crude product is purified on a silica column to obtain compound 154.
Compound 154 (0.29 gm, 1 mmol) is dissolved in 10 ml of Dimethyl formamide and 5 ml of water is added to the mixture. Glutathione (0.76 gm) is added to the mixture and stirred till it dissolved. The reaction mixture is purged with nitrogen and stirred for 30 minutes. 1 ml of 5% Hydrogen peroxide is added to it and the reaction stirred for approximately 24 hours at room temperature with regular monitoring using thin layer chromatography. The reaction mixture loaded onto a DEAE cellulose column (2 cm×20 cm long) in the hydroxide form and washed with 200 ml of distilled water. Bound material is eluted using a 0-400 mM gradient of triethylammonium bicarbonate (TEAB) buffer with 10 ml fractions being collected. Elution of compound 2 containing product is monitored by a ultraviolet flow through device. Fractions collected containing the UV absorbance is evaporated to dryness over four co-evaporations with methanol/water to remove TEAB. The resulting material is compound 155. The purity is checked with thin layered chromatography on PEI cellulose matrix developed with 0.4M ammonium bicarbonate solution.
Compound 154 (0.29 gm, 1 mmol) is dissolved in 10 ml of Dimethyl formamide and 5 ml of water is added to the mixture.
L-cysteine (0.50 gm) is added to the mixture and stirred till it dissolved. The reaction mixture is purged with nitrogen and stirred for 30 minutes. 1 ml of 5% Hydrogen peroxide is added to it and the reaction stirred for approximately 24 hours at room temperature with regular monitoring using thin layer chromatography. The reaction mixture loaded onto a DEAE cellulose column (2 cm×20 cm long) in the hydroxide form and washed with 200 ml of distilled water. Bound material is eluted using a 0-400 mM gradient of triethylammonium bicarbonate (TEAB) buffer with 10 ml fractions being collected. Elution of compound 2 containing product is monitored by a ultraviolet flow through device. Fractions collected containing the UV absorbance is evaporated to dryness over four co-evaporations with methanol/water to remove TEAB. The resulting material is compound 156. The purity is checked with thin layered chromatography on PEI cellulose matrix developed with 0.4M ammonium bicarbonate solution.
Thiophene-2,5-dicarboxylic acid dimethyl ester (2.00 g, 10 mmol) is taken in a 100 ml round bottomed flask. Methylene chloride (50 ml) is added to the flask. Oxalyl chloride (2.52 gm, 20 mmol) is added to the flask. The system is flushed with nitrogen and stirred for 24 hours. The reaction mixture may be warmed if the progress is slow. The progress is monitored using thin layer chromatography. The resulting acid chloride is used in the next step.
L-cysteine hydrochloride ethyl ester (2.825 gm, 25 mmol) is dissolved in a 100 ml round bottomed flask and Methylene chloride (50 ml) is added to it and stirred. Triethylamine (3.1 gm, 30 mmol) is added to it drop by drop under constant stirring. Once all the L-cysteine hydrochloride ethyl ester has dissolved the acid chloride generated in the earlier step is added to the reaction mixture drop wise. Triethylamine (5.15 gm, 50 mmol) is added to the mixture and the stirring continued for around 12 hours. The reaction progress is monitored using thin layered chromatography. The reaction is quenched by adding d.i water (15 ml). The mixture is separated on a separatory column. The organic layer is collected and washed three times with d.i water (15 ml×3). The layer is evaporated to collect the crude product. The crude product is purified on a silica column to obtain compound 157.
Compound 157 (0.434 gm, 1 mmol) is dissolved in 10 ml of Dimethyl formamide and 5 ml of water is added to the mixture. Glutathione (0.76 gm) is added to the mixture and stirred till it dissolved. The reaction mixture is purged with nitrogen and stirred for 30 minutes. 1 ml of 5% Hydrogen peroxide is added to it and the reaction stirred for approximately 24 hours at room temperature with regular monitoring using thin layer chromatography. The reaction mixture loaded onto a DEAE cellulose column (2 cm×20 cm long) in the hydroxide form and washed with 200 ml of distilled water. Bound material is eluted using a 0-400 mM gradient of triethylammonium bicarbonate (TEAB) buffer with 10 ml fractions being collected. Elution of compound 2 containing product is monitored by a ultraviolet flow through device. Fractions collected containing the UV absorbance is evaporated to dryness over four co-evaporations with methanol/water to remove TEAB. The resulting material is Compound 158. The purity is checked with thin layered chromatography on PEI cellulose matrix developed with 0.4M ammonium bicarbonate solution.
Compound 157 (0.434 gm, 1 mmol) is dissolved in 10 ml of Dimethyl formamide and 5 ml of water is added to the mixture.
L-cysteine (0.50 gm) is added to the mixture and stirred till it dissolved. The reaction mixture is purged with nitrogen and stirred for 30 minutes. 1 ml of 5% Hydrogen peroxide is added to it and the reaction stirred for approximately 24 hours at room temperature with regular monitoring using thin layer chromatography. The reaction mixture loaded onto a DEAE cellulose column (2 cm×20 cm long) in the hydroxide form and washed with 200 ml of distilled water. Bound material is eluted using a 0-400 mM gradient of triethylammonium bicarbonate (TEAB) buffer with 10 ml fractions being collected. Elution of compound 2 containing product is monitored by a ultraviolet flow through device. Fractions collected containing the UV absorbance is evaporated to dryness over four co-evaporations with methanol/water to remove TEAB. The resulting material is compound 159. The purity is checked with thin layered chromatography on PEI cellulose matrix developed with 0.4M ammonium bicarbonate solution.
Thiophene-2,5-dicarboxylic acid dimethyl ester (2.00 g, 10 mmol) is taken in a 100 ml round bottomed flask. Methylene chloride (50 ml) is added to the flask. Oxalyl chloride (2.52 gm, 20 mmol) is added to the flask. The system is flushed with nitrogen and stirred for 24 hours. The reaction mixture may be warmed if the progress is slow. The progress is monitored using thin layer chromatography. The resulting acid chloride is used in the next step.
L-cysteine hydrochloride methyl ester (2.625 gm, 25 mmol) is dissolved in a 100 ml round bottomed flask and Methylene chloride (50 ml) is added to it and stirred. Triethylamine (3.1 gm, 30 mmol) is added to it drop by drop under constant stirring. Once all the L-cysteine hydrochloride methyl ester has dissolved the acid chloride generated in the earlier step is added to the reaction mixture drop wise. Triethylamine (5.15 gm, 50 mmol) is added to the mixture and the stirring continued for around 12 hours. The reaction progress is monitored using thin layered chromatography. The reaction is quenched by adding water (15 ml). The mixture is separated on a separatory column. The organic layer is collected and washed three times with d.i water (15 ml×3). The layer is evaporated to collect the crude product. The crude product is purified on a silica column to obtain compound 160.
Compound 160 (0.40 gm, 1 mmol) is dissolved in 10 ml of Dimethyl formamide and 5 ml of water is added to the mixture. Glutathione (0.76 gm) is added to the mixture and stirred till it dissolved. The reaction mixture is purged with nitrogen and stirred for 30 minutes. 1 ml of 5% Hydrogen peroxide is added to it and the reaction stirred for approximately 24 hours at room temperature with regular monitoring using thin layer chromatography. The reaction mixture loaded onto a DEAE cellulose column (2 cm×20 cm long) in the hydroxide form and washed with 200 ml of distilled water. Bound material is eluted using a 0-400 mM gradient of triethylammonium bicarbonate (TEAB) buffer with 10 ml fractions being collected. Elution of compound 2 containing product is monitored by a ultraviolet flow through device. Fractions collected containing the UV absorbance is evaporated to dryness over four co-evaporations with methanol/water to remove TEAB. The resulting material is Compound 161. The purity is checked with thin layered chromatography on PEI cellulose matrix developed with 0.4M ammonium bicarbonate solution.
Compound 160 (0.40 gm, 1 mmol) is dissolved in 10 ml of Dimethyl formamide and 5 ml of water is added to the mixture.
L-cysteine (0.50 gm) is added to the mixture and stirred till it dissolved. The reaction mixture is purged with nitrogen and stirred for 30 minutes. 1 ml of 5% Hydrogen peroxide is added to it and the reaction stirred for approximately 24 hours at room temperature with regular monitoring using thin layer chromatography. The reaction mixture loaded onto a DEAE cellulose column (2 cm×20 cm long) in the hydroxide form and washed with 200 ml of distilled water. Bound material is eluted using a 0-400 mM gradient of triethylammonium bicarbonate (TEAB) buffer with 10 ml fractions being collected. Elution of compound 2 containing product is monitored by a ultraviolet flow through device. Fractions collected containing the UV absorbance is evaporated to dryness over four co-evaporations with methanol/water to remove TEAB. The resulting material is compound 162. The purity is checked with thin layered chromatography on PEI cellulose matrix developed with 0.4M ammonium bicarbonate solution.
Compounds: 163-171
Starting Material: 3-Methyl thiophene-2,4-dicarboxylic acid dimethyl ester. Aldrich Catalog number R 432628. M.W: 214.24
3-Methyl thiophene-2,4-dicarboxylic acid dimethyl ester (2.14 g, 10 mmol) is taken in a 100 ml round bottomed flask. Methylene chloride (50 ml) is added to the flask. Oxalyl chloride (2.52 gm, 20 mmol) is added to the flask. The system is flushed with nitrogen and stirred for 24 hours. The reaction mixture may be warmed if the progress is slow. The progress is monitored using thin layer chromatography. The resulting acid chloride is used in the next step.
Cysteamine hydrochloride (2.825 gm, 25 mmol) is dissolved in a 100 ml round bottomed flask and Methylene chloride (50 ml) is added to it and stirred. Triethylamine (3.1 gm, 30 mmol) is added to it drop by drop under constant stirring. Once all the cysteamine hydrochloride has dissolved the acid chloride generated in the earlier step is added to the reaction mixture drop wise. Triethylamine (5.15 gm, 50 mmol) is added to the mixture and the stirring continued for around 12 hours. The reaction progress is monitored using thin layered chromatography. The reaction is quenched by adding water (15 ml). The mixture is separated on a separatory column. The organic layer is collected and washed three times with d.i water (15 ml×3). The layer is evaporated to collect the crude product. The crude product is purified on a silica column to obtain compound 163.
Compound 163 (0.30 gm, 1 mmol) is dissolved in 10 ml of Dimethyl formamide and 5 ml of water is added to the mixture. Glutathione (0.76 gm) is added to the mixture and stirred till it dissolved. The reaction mixture is purged with nitrogen and stirred for 30 minutes. 1 ml of 5% Hydrogen peroxide is added to it and the reaction stirred for approximately 24 hours at room temperature with regular monitoring using thin layer chromatography. The reaction mixture loaded onto a DEAE cellulose column (2 cm×20 cm long) in the hydroxide form and washed with 200 ml of distilled water. Bound material is eluted using a 0-400 mM gradient of triethylammonium bicarbonate (TEAB) buffer with 10 ml fractions being collected. Elution of compound 2 containing product is monitored by a ultraviolet flow through device. Fractions collected containing the UV absorbance is evaporated to dryness over four co-evaporations with methanol/water to remove TEAB. The resulting material is compound 164. The purity is checked with thin layered chromatography on PEI cellulose matrix developed with 0.4M ammonium bicarbonate solution.
Compound 163 (0.30 gm, 1 mmol) is dissolved in 10 ml of Dimethyl formamide and 5 ml of water is added to the mixture.
L-cysteine (0.50 gm) is added to the mixture and stirred till it dissolved. The reaction mixture is purged with nitrogen and stirred for 30 minutes. 1 ml of 5% Hydrogen peroxide is added to it and the reaction stirred for approximately 24 hours at room temperature with regular monitoring using thin layer chromatography. The reaction mixture loaded onto a DEAE cellulose column (2 cm×20 cm long) in the hydroxide form and washed with 200 ml of distilled water. Bound material is eluted using a 0-400 mM gradient of triethylammonium bicarbonate (TEAB) buffer with 10 ml fractions being collected. Elution of compound 2 containing product is monitored by a ultraviolet flow through device. Fractions collected containing the UV absorbance is evaporated to dryness over four co-evaporations with methanol/water to remove TEAB. The resulting material is compound 165. The purity is
3-Methyl thiophene-2,4-dicarboxylic acid dimethyl ester (2.14 g, 10 mmol) is taken in a 100 ml round bottomed flask. Methylene chloride (50 ml) is added to the flask. Oxalyl chloride (2.52 gm, 20 mmol) is added to the flask. The system is flushed with nitrogen and stirred for 24 hours. The reaction mixture may be warmed if the progress is slow. The progress is monitored using thin layer chromatography. The resulting acid chloride is used in the next step.
L-cysteine hydrochloride ethyl ester (2.825 gm, 25 mmol) is dissolved in a 100 ml round bottomed flask and Methylene chloride (50 ml) is added to it and stirred. Triethylamine (3.1 gm, 30 mmol) is added to it drop by drop under constant stirring. Once all the L-cysteine hydrochloride ethyl ester has dissolved the acid chloride generated in the earlier step is added to the reaction mixture drop wise. Triethylamine (5.15 gm, 50 mmol) is added to the mixture and the stirring continued for around 12 hours. The reaction progress is monitored using thin layered chromatography. The reaction is quenched by adding d.i water (15 ml). The mixture is separated on a separatory column. The organic layer is collected and washed three times with d.i water (15 ml×3). The layer is evaporated to collect the crude product. The crude product is purified on a silica column to obtain compound 166.
Compound 166 (0.448 gm, 1 mmol) is dissolved in 10 ml of Dimethyl formamide and 5 ml of water is added to the mixture. Glutathione (0.76 gm) is added to the mixture and stirred till it dissolved. The reaction mixture is purged with nitrogen and stirred for 30 minutes. 1 ml of 5% Hydrogen peroxide is added to it and the reaction stirred for approximately 24 hours at room temperature with regular monitoring using thin layer chromatography. The reaction mixture loaded onto a DEAE cellulose column (2 cm×20 cm long) in the hydroxide form and washed with 200 ml of distilled water. Bound material is eluted using a 0-400 mM gradient of triethylammonium bicarbonate (TEAB) buffer with 10 ml fractions being collected. Elution of compound 2 containing product is monitored by a ultraviolet flow through device. Fractions collected containing the UV absorbance is evaporated to dryness over four co-evaporations with methanol/water to remove TEAB. The resulting material is Compound 167. The purity is checked with thin layered chromatography on PEI cellulose matrix developed with 0.4M ammonium bicarbonate solution.
Compound 166 (0.448 gm, 1 mmol) is dissolved in 10 ml of Dimethyl formamide and 5 ml of water is added to the mixture.
L-cysteine (0.50 gm) is added to the mixture and stirred till it dissolved. The reaction mixture is purged with nitrogen and stirred for 30 minutes. 1 ml of 5% Hydrogen peroxide is added to it and the reaction stirred for approximately 24 hours at room temperature with regular monitoring using thin layer chromatography. The reaction mixture loaded onto a DEAE cellulose column (2 cm×20 cm long) in the hydroxide form and washed with 200 ml of distilled water. Bound material is eluted using a 0-400 mM gradient of triethylammonium bicarbonate (TEAB) buffer with 10 ml fractions being collected. Elution of compound 2 containing product is monitored by a ultraviolet flow through device. Fractions collected containing the UV absorbance is evaporated to dryness over four co-evaporations with methanol/water to remove TEAB. The resulting material is compound 168. The purity is checked with thin layered chromatography on PEI cellulose matrix developed with 0.4M ammonium bicarbonate solution.
3-Methyl thiophene-2,4-dicarboxylic acid dimethyl ester (2.14 g, 10 mmol) is taken in a 100 ml round bottomed flask. Methylene chloride (50 ml) is added to the flask. Oxalyl chloride (2.52 gm, 20 mmol) is added to the flask. The system is flushed with nitrogen and stirred for 24 hours. The reaction mixture may be warmed if the progress is slow. The progress is monitored using thin layer chromatography. The resulting acid chloride is used in the next step.
L-cysteine hydrochloride methyl ester (2.625 gm, 25 mmol) is dissolved in a 100 ml round bottomed flask and Methylene chloride (50 ml) is added to it and stirred. Triethylamine (3.1 gm, 30 mmol) is added to it drop by drop under constant stirring. Once all the L-cysteine hydrochloride methyl ester has dissolved the acid chloride generated in the earlier step is added to the reaction mixture drop wise. Triethylamine (5.15 gm, 50 mmol) is added to the mixture and the stirring continued for around 12 hours. The reaction progress is monitored using thin layered chromatography. The reaction is quenched by adding water (15 ml). The mixture is separated on a separatory column. The organic layer is collected and washed three times with d.i water (15 ml×3). The layer is evaporated to collect the crude product. The crude product is purified on a silica column to obtain compound 169.
Compound 169 (0.42 gm, 1 mmol) is dissolved in 10 ml of Dimethyl formamide and 5 ml of water is added to the mixture. Glutathione (0.76 gm) is added to the mixture and stirred till it dissolved. The reaction mixture is purged with nitrogen and stirred for 30 minutes. 1 ml of 5% Hydrogen peroxide is added to it and the reaction stirred for approximately 24 hours at room temperature with regular monitoring using thin layer chromatography. The reaction mixture loaded onto a DEAE cellulose column (2 cm×20 cm long) in the hydroxide form and washed with 200 ml of distilled water. Bound material is eluted using a 0-400 mM gradient of triethylammonium bicarbonate (TEAB) buffer with 10 ml fractions being collected. Elution of compound 2 containing product is monitored by a ultraviolet flow through device. Fractions collected containing the UV absorbance is evaporated to dryness over four co-evaporations with methanol/water to remove TEAB. The resulting material is Compound 170. The purity is checked with thin layered chromatography on PEI cellulose matrix developed with 0.4M ammonium bicarbonate solution.
Compound 169 (0.42 gm, 1 mmol) is dissolved in 10 ml of Dimethyl formamide and 5 ml of water is added to the mixture.
L-cysteine (0.50 gm) is added to the mixture and stirred till it dissolved. The reaction mixture is purged with nitrogen and stirred for 30 minutes. 1 ml of 5% Hydrogen peroxide is added to it and the reaction stirred for approximately 24 hours at room temperature with regular monitoring using thin layer chromatography. The reaction mixture loaded onto a DEAE cellulose column (2 cm×20 cm long) in the hydroxide form and washed with 200 ml of distilled water. Bound material is eluted using a 0-400 mM gradient of triethylammonium bicarbonate (TEAB) buffer with 10 ml fractions being collected. Elution of compound 2 containing product is monitored by a ultraviolet flow through device. Fractions collected containing the UV absorbance is evaporated to dryness over four co-evaporations with methanol/water to remove TEAB. The resulting material is compound 171. The purity is checked with thin layered chromatography on PEI cellulose matrix developed with 0.4M ammonium bicarbonate solution.
Starting Material: Dimethyl-2,6-napthalene dicarboxylic acid. Fluka Catalog number: 70230. M.W: 244.24
Dimethyl-2,6-napthalene dicarboxylic acid (2.44 g, 10 mmol) is taken in a 100 ml round bottomed flask. Methylene chloride (50 ml) is added to the flask. Oxalyl chloride (2.52 gm, 20 mmol) is added to the flask. 2 drops of DMF is added as a catalyst. The system is flushed with nitrogen and refluxed for 24 hours. The progress is monitored using thin layer chromatography. The resulting acid chloride is used in the next step.
Cysteamine hydrochloride (2.825 gm, 25 mmol) is dissolved in a 100 ml round bottomed flask and Methylene chloride (50 ml) is added to it and stirred. Triethylamine (3.1 gm, 30 mmol) is added to it drop by drop under constant stirring. Once all the cysteamine hydrochloride has dissolved the acid chloride generated in the earlier step is added to the reaction mixture drop wise. Triethylamine (5.15 gm, 50 mmol) is added to the mixture and the stirring continued for around 12 hours. The reaction progress is monitored using thin layered chromatography. The reaction is quenched by adding water (15 ml). The mixture is separated on a separatory column. The organic layer is collected and washed three times with d.i water (15 ml×3). The layer is evaporated to collect the crude product. The crude product is purified on a silica column to obtain compound 172.
Compound 172 (0.334 gm, 1 mmol) is dissolved in 10 ml of Dimethyl formamide and 5 ml of water is added to the mixture. Glutathione (0.76 gm) is added to the mixture and stirred till it dissolved. The reaction mixture is purged with nitrogen and stirred for 30 minutes. 1 ml of 5% Hydrogen peroxide is added to it and the reaction stirred for approximately 24 hours at room temperature with regular monitoring using thin layer chromatography. The reaction mixture loaded onto a DEAE cellulose column (2 cm×20 cm long) in the hydroxide form and washed with 200 ml of distilled water. Bound material is eluted using a 0-400 mM gradient of triethylammonium bicarbonate (TEAB) buffer with 10 ml fractions being collected. Elution of compound 2 containing product is monitored by a ultraviolet flow through device. Fractions collected containing the UV absorbance is evaporated to dryness over four co-evaporations with methanol/water to remove TEAB. The resulting material is compound 173. The purity is checked with thin layered chromatography on PEI cellulose matrix developed with 0.4M ammonium bicarbonate solution.
Compound 172 (0.334 gm, 1 mmol) is dissolved in 10 ml of Dimethyl formamide and 5 ml of water is added to the mixture.
L-cysteine (0.50 gm) is added to the mixture and stirred till it dissolved. The reaction mixture is purged with nitrogen and stirred for 30 minutes. 1 ml of 5% Hydrogen peroxide is added to it and the reaction stirred for approximately 24 hours at room temperature with regular monitoring using thin layer chromatography. The reaction mixture loaded onto a DEAE cellulose column (2 cm×20 cm long) in the hydroxide form and washed with 200 ml of distilled water. Bound material is eluted using a 0-400 mM gradient of triethylammonium bicarbonate (TEAB) buffer with 10 ml fractions being collected. Elution of compound 2 containing product is monitored by a ultraviolet flow through device. Fractions collected containing the UV absorbance is evaporated to dryness over four co-evaporations with methanol/water to remove TEAB. The resulting material is Compound 174. The purity is checked with thin layered chromatography on PEI cellulose matrix developed with 0.4M ammonium bicarbonate solution.
Dimethyl-2,6-napthalene dicarboxylic acid (2.44 g, 10 mmol) is taken in a 100 ml round bottomed flask. Methylene chloride (50 ml) is added to the flask. Oxalyl chloride (2.52 gm, 20 mmol) is added to the flask. 2 drops of DMF is added as a catalyst. The system is flushed with nitrogen and refluxed for 24 hours. The progress is monitored using thin layer chromatography. The resulting acid chloride is used in the next step.
L-cysteine hydrochloride ethyl ester (2.825 gm, 25 mmol) is dissolved in a 100 ml round bottomed flask and Methylene chloride (50 ml) is added to it and stirred. Triethylamine (3.1 gm, 30 mmol) is added to it drop by drop under constant stirring. Once all the L-cysteine hydrochloride ethyl ester has dissolved the acid chloride generated in the earlier step is added to the reaction mixture drop wise. Triethylamine (5.15 gm, 50 mmol) is added to the mixture and the stirring continued for around 12 hours. The reaction progress is monitored using thin layered chromatography. The reaction is quenched by adding d.i water (15 ml). The mixture is separated on a separatory column. The organic layer is collected and washed three times with d.i water (15 ml×3). The layer is evaporated to collect the crude product. The crude product is purified on a silica column to obtain compound 175.
Compound 175 (0.478 gm, 1 mmol) is dissolved in 10 ml of Dimethyl formamide and 5 ml of water is added to the mixture. Glutathione (0.76 gm) is added to the mixture and stirred till it dissolved. The reaction mixture is purged with nitrogen and stirred for 30 minutes. 1 ml of 5% Hydrogen peroxide is added to it and the reaction stirred for approximately 24 hours at room temperature with regular monitoring using thin layer chromatography. The reaction mixture loaded onto a DEAE cellulose column (2 cm×20 cm long) in the hydroxide form and washed with 200 ml of distilled water. Bound material is eluted using a 0-400 mM gradient of triethylammonium bicarbonate (TEAB) buffer with 10 ml fractions being collected. Elution of compound 2 containing product is monitored by a ultraviolet flow through device. Fractions collected containing the UV absorbance is evaporated to dryness over four co-evaporations with methanol/water to remove TEAB. The resulting material is Compound 176. The purity is checked with thin layered chromatography on PEI cellulose matrix developed with 0.4M ammonium bicarbonate solution.
Compound 175 (0.478 gm, 1 mmol) is dissolved in 10 ml of Dimethyl formamide and 5 ml of water is added to the mixture.
L-cysteine (0.50 gm) is added to the mixture and stirred till it dissolved. The reaction mixture is purged with nitrogen and stirred for 30 minutes. 1 ml of 5% Hydrogen peroxide is added to it and the reaction stirred for approximately 24 hours at room temperature with regular monitoring using thin layer chromatography. The reaction mixture loaded onto a DEAE cellulose column (2 cm×20 cm long) in the hydroxide form and washed with 200 ml of distilled water. Bound material is eluted using a 0-400 mM gradient of triethylammonium bicarbonate (TEAB) buffer with 10 ml fractions being collected. Elution of compound 2 containing product is monitored by a ultraviolet flow through device. Fractions collected containing the UV absorbance is evaporated to dryness over four co-evaporations with methanol/water to remove TEAB. The resulting material is compound 177. The purity is
Dimethyl-2,6-napthalene dicarboxylic acid (2.44 g, 10 mmol) is taken in a 100 ml round bottomed flask. Methylene chloride (50 ml) is added to the flask. Oxalyl chloride (2.52 gm, 20 mmol) is added to the flask. 2 drops of DMF is added as a catalyst. The system is flushed with nitrogen and refluxed for 24 hours. The progress is monitored using thin layer chromatography. The resulting acid chloride is used in the next step.
L-cysteine hydrochloride methyl ester (2.625 gm, 25 mmol) is dissolved in a 100 ml round bottomed flask and Methylene chloride (50 ml) is added to it and stirred. Triethylamine (3.1 gm, 30 mmol) is added to it drop by drop under constant stirring. Once all the L-cysteine hydrochloride methyl ester has dissolved the acid chloride generated in the earlier step is added to the reaction mixture drop wise. Triethylamine (5.15 gm, 50 mmol) is added to the mixture and the stirring continued for around 12 hours. The reaction progress is monitored using thin layered chromatography. The reaction is quenched by adding water (15 ml). The mixture is separated on a separatory column. The organic layer is collected and washed three times with d.i water (15 ml×3). The layer is evaporated to collect the crude product. The crude product is purified on a silica column to obtain compound 178.
Compound 178 (0.478 gm, 1 mmol) is dissolved in 10 ml of Dimethyl formamide and 5 ml of water is added to the mixture. Glutathione (0.76 gm) is added to the mixture and stirred till it dissolved. The reaction mixture is purged with nitrogen and stirred for 30 minutes. 1 ml of 5% Hydrogen peroxide is added to it and the reaction stirred for approximately 24 hours at room temperature with regular monitoring using thin layer chromatography. The reaction mixture loaded onto a DEAE cellulose column (2 cm×20 cm long) in the hydroxide form and washed with 200 ml of distilled water. Bound material is eluted using a 0-400 mM gradient of triethylammonium bicarbonate (TEAB) buffer with 10 ml fractions being collected. Elution of compound 2 containing product is monitored by a ultraviolet flow through device. Fractions collected containing the UV absorbance is evaporated to dryness over four co-evaporations with methanol/water to remove TEAB. The resulting material is Compound 179. The purity is checked with thin layered chromatography on PEI cellulose matrix developed with 0.4M ammonium bicarbonate solution.
Compound 178 (0.478 gm, 1 mmol) is dissolved in 10 ml of Dimethyl formamide and 5 ml of water is added to the mixture.
L-cysteine (0.50 gm) is added to the mixture and stirred till it dissolved. The reaction mixture is purged with nitrogen and stirred for 30 minutes. 1 ml of 5% Hydrogen peroxide is added to it and the reaction stirred for approximately 24 hours at room temperature with regular monitoring using thin layer chromatography. The reaction mixture loaded onto a DEAE cellulose column (2 cm×20 cm long) in the hydroxide form and washed with 200 ml of distilled water. Bound material is eluted using a 0-400 mM gradient of triethylammonium bicarbonate (TEAB) buffer with 10 ml fractions being collected. Elution of compound 2 containing product is monitored by a ultraviolet flow through device. Fractions collected containing the UV absorbance is evaporated to dryness over four co-evaporations with methanol/water to remove TEAB. The resulting material is compound 180. The purity is checked with thin layered chromatography on PEI cellulose matrix developed with 0.4M ammonium bicarbonate solution.
Starting Material: 4,4′-sulfonyldibenzoic acid. Aldrich Catalog number: 163295. M.W: 306.29
4,4′-sulfonyldibenzoic acid (3.06 g, 10 mmol) is taken in a 100 ml round bottomed flask. Methylene chloride (50 ml) is added to the flask. Oxalyl chloride (2.52 gm, 20 mmol) is added to the flask. 2 drops of DMF is added as a catalyst. The system is flushed with nitrogen and refluxed for 24 hours. The progress is monitored using thin layer chromatography. The resulting acid chloride is used in the next step.
Cysteamine hydrochloride (2.825 gm, 25 mmol) is dissolved in a 100 ml round bottomed flask and Methylene chloride (50 ml) is added to it and stirred. Triethylamine (3.1 gm, 30 mmol) is added to it drop by drop under constant stirring. Once all the cysteamine hydrochloride has dissolved the acid chloride generated in the earlier step is added to the reaction mixture drop wise. Triethylamine (5.15 gm, 50 mmol) is added to the mixture and the stirring continued for around 12 hours. The reaction progress is monitored using thin layered chromatography. The reaction is quenched by adding water (15 ml). The mixture is separated on a separatory column. The organic layer is collected and washed three times with d.i water (15 ml×3). The layer is evaporated to collect the crude product. The crude product is purified on a silica column to obtain compound 181.
Compound 181 (0.424 gm, 1 mmol) is dissolved in 10 ml of Dimethyl formamide and 5 ml of water is added to the mixture. Glutathione (0.76 gm) is added to the mixture and stirred till it dissolved. The reaction mixture is purged with nitrogen and stirred for 30 minutes. 1 ml of 5% Hydrogen peroxide is added to it and the reaction stirred for approximately 24 hours at room temperature with regular monitoring using thin layer chromatography. The reaction mixture loaded onto a DEAE cellulose column (2 cm×20 cm long) in the hydroxide form and washed with 200 ml of distilled water. Bound material is eluted using a 0-400 mM gradient of triethylammonium bicarbonate (TEAB) buffer with 10 ml fractions being collected. Elution of compound 2 containing product is monitored by a ultraviolet flow through device. Fractions collected containing the UV absorbance is evaporated to dryness over four co-evaporations with methanol/water to remove TEAB. The resulting material is compound 182. The purity is checked with thin layered chromatography on PEI cellulose matrix developed with 0.4M ammonium bicarbonate solution.
Compound 181 (0.424 gm, 1 mmol) is dissolved in 10 ml of Dimethyl formamide and 5 ml of water is added to the mixture.
L-cysteine (0.50 gm) is added to the mixture and stirred till it dissolved. The reaction mixture is purged with nitrogen and stirred for 30 minutes. 1 ml of 5% Hydrogen peroxide is added to it and the reaction stirred for approximately 24 hours at room temperature with regular monitoring using thin layer chromatography. The reaction mixture loaded onto a DEAE cellulose column (2 cm×20 cm long) in the hydroxide form and washed with 200 ml of distilled water. Bound material is eluted using a 0-400 mM gradient of triethylammonium bicarbonate (TEAB) buffer with 10 ml fractions being collected. Elution of compound 2 containing product is monitored by a ultraviolet flow through device. Fractions collected containing the UV absorbance is evaporated to dryness over four co-evaporations with methanol/water to remove TEAB. The resulting material is Compound 183. The purity is checked with thin layered chromatography on PEI cellulose matrix developed with 0.4M ammonium bicarbonate solution.
4,4′-sulfonyldibenzoic acid (3.06 g, 10 mmol) is taken in a 100 ml round bottomed flask. Methylene chloride (50 ml) is added to the flask. Oxalyl chloride (2.52 gm, 20 mmol) is added to the flask. 2 drops of DMF is added as a catalyst. The system is flushed with nitrogen and refluxed for 24 hours. The progress is monitored using thin layer chromatography. The resulting acid chloride is used in the next step.
L-cysteine hydrochloride ethyl ester (2.825 gm, 25 mmol) is dissolved in a 100 ml round bottomed flask and Methylene chloride (50 ml) is added to it and stirred. Triethylamine (3.1 gm, 30 mmol) is added to it drop by drop under constant stirring. Once all the L-cysteine hydrochloride ethyl ester has dissolved the acid chloride generated in the earlier step is added to the reaction mixture drop wise. Triethylamine (5.15 gm, 50 mmol) is added to the mixture and the stirring continued for around 12 hours. The reaction progress is monitored using thin layered chromatography. The reaction is quenched by adding d.i water (15 ml). The mixture is separated on a separatory column. The organic layer is collected and washed three times with d.i water (15 ml×3). The layer is evaporated to collect the crude product. The crude product is purified on a silica column to obtain compound 184.
Compound 184 (0.568 gm, 1 mmol) is dissolved in 10 ml of Dimethyl formamide and 5 ml of water is added to the mixture. Glutathione (0.76 gm) is added to the mixture and stirred till it dissolved. The reaction mixture is purged with nitrogen and stirred for 30 minutes. 1 ml of 5% Hydrogen peroxide is added to it and the reaction stirred for approximately 24 hours at room temperature with regular monitoring using thin layer chromatography. The reaction mixture loaded onto a DEAE cellulose column (2 cm×20 cm long) in the hydroxide form and washed with 200 ml of distilled water. Bound material is eluted using a 0-400 mM gradient of triethylammonium bicarbonate (TEAB) buffer with 10 ml fractions being collected. Elution of compound 2 containing product is monitored by a ultraviolet flow through device. Fractions collected containing the UV absorbance is evaporated to dryness over four co-evaporations with methanol/water to remove TEAB. The resulting material is Compound 185. The purity is checked with thin layered chromatography on PEI cellulose matrix developed with 0.4M ammonium bicarbonate solution.
Compound 184 (0.568 gm, 1 mmol) is dissolved in 10 ml of Dimethyl formamide and 5 ml of water is added to the mixture.
L-cysteine (0.50 gm) is added to the mixture and stirred till it dissolved. The reaction mixture is purged with nitrogen and stirred for 30 minutes. 1 ml of 5% Hydrogen peroxide is added to it and the reaction stirred for approximately 24 hours at room temperature with regular monitoring using thin layer chromatography. The reaction mixture loaded onto a DEAE cellulose column (2 cm×20 cm long) in the hydroxide form and washed with 200 ml of distilled water. Bound material is eluted using a 0-400 mM gradient of triethylammonium bicarbonate (TEAB) buffer with 10 ml fractions being collected. Elution of compound 2 containing product is monitored by a ultraviolet flow through device. Fractions collected containing the UV absorbance is evaporated to dryness over four co-evaporations with methanol/water to remove TEAB. The resulting material is compound 186. The purity is checked with thin layered chromatography on PEI cellulose matrix developed with 0.4M ammonium bicarbonate solution.
4,4′-sulfonyldibenzoic acid (3.06 g, 10 mmol) is taken in a 100 ml round bottomed flask. Methylene chloride (50 ml) is added to the flask. Oxalyl chloride (2.52 gm, 20 mmol) is added to the flask. 2 drops of DMF is added as a catalyst. The system is flushed with nitrogen and refluxed for 24 hours. The progress is monitored using thin layer chromatography. The resulting acid chloride is used in the next step.
L-cysteine hydrochloride methyl ester (2.625 gm, 25 mmol) is dissolved in a 100 ml round bottomed flask and Methylene chloride (50 ml) is added to it and stirred. Triethylamine (3.1 gm, 30 mmol) is added to it drop by drop under constant stirring. Once all the L-cysteine hydrochloride methyl ester has dissolved the acid chloride generated in the earlier step is added to the reaction mixture drop wise. Triethylamine (5.15 gm, 50 mmol) is added to the mixture and the stirring continued for around 12 hours. The reaction progress is monitored using thin layered chromatography. The reaction is quenched by adding water (15 ml). The mixture is separated on a separatory column. The organic layer is collected and washed three times with d.i water (15 ml×3). The layer is evaporated to collect the crude product. The crude product is purified on a silica column to obtain compound 187.
Compound 187 (0.54 gm, 1 mmol) is dissolved in 10 ml of Dimethyl formamide and 5 ml of water is added to the mixture. Glutathione (0.76 gm) is added to the mixture and stirred till it dissolved. The reaction mixture is purged with nitrogen and stirred for 30 minutes. 1 ml of 5% Hydrogen peroxide is added to it and the reaction stirred for approximately 24 hours at room temperature with regular monitoring using thin layer chromatography. The reaction mixture loaded onto a DEAE cellulose column (2 cm×20 cm long) in the hydroxide form and washed with 200 ml of distilled water. Bound material is eluted using a 0-400 mM gradient of triethylammonium bicarbonate (TEAB) buffer with 10 ml fractions being collected. Elution of compound 2 containing product is monitored by a ultraviolet flow through device. Fractions collected containing the UV absorbance is evaporated to dryness over four co-evaporations with methanol/water to remove TEAB. The resulting material is Compound 188. The purity is checked with thin layered chromatography on PEI cellulose matrix developed with 0.4M ammonium bicarbonate solution.
Compound 187 (0.54 gm, 1 mmol) is dissolved in 10 ml of Dimethyl formamide and 5 ml of water is added to the mixture.
L-cysteine (0.50 gm) is added to the mixture and stirred till it dissolved. The reaction mixture is purged with nitrogen and stirred for 30 minutes. 1 ml of 5% Hydrogen peroxide is added to it and the reaction stirred for approximately 24 hours at room temperature with regular monitoring using thin layer chromatography. The reaction mixture loaded onto a DEAE cellulose column (2 cm×20 cm long) in the hydroxide form and washed with 200 ml of distilled water. Bound material is eluted using a 0-400 mM gradient of triethylammonium bicarbonate (TEAB) buffer with 10 ml fractions being collected. Elution of compound 2 containing product is monitored by a ultraviolet flow through device. Fractions collected containing the UV absorbance is evaporated to dryness over four co-evaporations with methanol/water to remove TEAB. The resulting material is compound 189. The purity is checked with thin layered chromatography on PEI cellulose matrix developed with 0.4M ammonium bicarbonate solution.
Starting Material: Biphenyl-4,4′-dicarboxylic acid. Aldrich Catalog number: 225266. M.W: 242.23
Biphenyl-4,4′-dicarboxylic acid (2.42 g, 10 mmol) is taken in a 100 ml round bottomed flask. Methylene chloride (50 ml) is added to the flask. Oxalyl chloride (2.52 gm, 20 mmol) is added to the flask. 2 drops of DMF is added as a catalyst. The system is flushed with nitrogen and refluxed for 24 hours. The progress is monitored using thin layer chromatography. The resulting acid chloride is used in the next step.
Cysteamine hydrochloride (2.825 gm, 25 mmol) is dissolved in a 100 ml round bottomed flask and Methylene chloride (50 ml) is added to it and stirred. Triethylamine (3.1 gm, 30 mmol) is added to it drop by drop under constant stirring. Once all the cysteamine hydrochloride has dissolved the acid chloride generated in the earlier step is added to the reaction mixture drop wise. Triethylamine (5.15 gm, 50 mmol) is added to the mixture and the stirring continued for around 12 hours. The reaction progress is monitored using thin layered chromatography. The reaction is quenched by adding water (15 ml). The mixture is separated on a separatory column. The organic layer is collected and washed three times with d.i water (15 ml×3). The layer is evaporated to collect the crude product. The crude product is purified on a silica column to obtain compound 190.
Compound 190 (0.360 gm, 1 mmol) is dissolved in 10 ml of Dimethyl formamide and 5 ml of water is added to the mixture. Glutathione (0.76 gm) is added to the mixture and stirred till it dissolved. The reaction mixture is purged with nitrogen and stirred for 30 minutes. 1 ml of 5% Hydrogen peroxide is added to it and the reaction stirred for approximately 24 hours at room temperature with regular monitoring using thin layer chromatography. The reaction mixture loaded onto a DEAE cellulose column (2 cm×20 cm long) in the hydroxide form and washed with 200 ml of distilled water. Bound material is eluted using a 0-400 mM gradient of triethylammonium bicarbonate (TEAB) buffer with 10 ml fractions being collected. Elution of compound 2 containing product is monitored by a ultraviolet flow through device. Fractions collected containing the UV absorbance is evaporated to dryness over four co-evaporations with methanol/water to remove TEAB. The resulting material is compound 191. The purity is checked with thin layered chromatography on PEI cellulose matrix developed with 0.4M ammonium bicarbonate solution.
Compound 190 (0.362 gm, 1 mmol) is dissolved in 10 ml of Dimethyl formamide and 5 ml of water is added to the mixture.
L-cysteine (0.50 gm) is added to the mixture and stirred till it dissolved. The reaction mixture is purged with nitrogen and stirred for 30 minutes. 1 ml of 5% Hydrogen peroxide is added to it and the reaction stirred for approximately 24 hours at room temperature with regular monitoring using thin layer chromatography. The reaction mixture loaded onto a DEAE cellulose column (2 cm×20 cm long) in the hydroxide form and washed with 200 ml of distilled water. Bound material is eluted using a 0-400 mM gradient of triethylammonium bicarbonate (TEAB) buffer with 10 ml fractions being collected. Elution of compound 2 containing product is monitored by a ultraviolet flow through device. Fractions collected containing the UV absorbance is evaporated to dryness over four co-evaporations with methanol/water to remove TEAB. The resulting material is Compound 192. The purity is checked with thin layered chromatography on PEI cellulose matrix developed with 0.4M ammonium bicarbonate solution.
Biphenyl-4,4′-dicarboxylic acid (2.42 g, 10 mmol) is taken in a 100 ml round bottomed flask. Methylene chloride (50 ml) is added to the flask. Oxalyl chloride (2.52 gm, 20 mmol) is added to the flask. 2 drops of DMF is added as a catalyst. The system is flushed with nitrogen and refluxed for 24 hours. The progress is monitored using thin layer chromatography. The resulting acid chloride is used in the next step.
L-cysteine hydrochloride ethyl ester (2.825 gm, 25 mmol) is dissolved in a 100 ml round bottomed flask and Methylene chloride (50 ml) is added to it and stirred. Triethylamine (3.1 gm, 30 mmol) is added to it drop by drop under constant stirring. Once all the L-cysteine hydrochloride ethyl ester has dissolved the acid chloride generated in the earlier step is added to the reaction mixture drop wise. Triethylamine (5.15 gm, 50 mmol) is added to the mixture and the stirring continued for around 12 hours. The reaction progress is monitored using thin layered chromatography. The reaction is quenched by adding d.i water (15 ml). The mixture is separated on a separatory column. The organic layer is collected and washed three times with d.i water (15 ml×3). The layer is evaporated to collect the crude product. The crude product is purified on a silica column to obtain compound 193.
Compound 193 (0.504 gm, 1 mmol) is dissolved in 10 ml of Dimethyl formamide and 5 ml of water is added to the mixture. Glutathione (0.76 gm) is added to the mixture and stirred till it dissolved. The reaction mixture is purged with nitrogen and stirred for 30 minutes. 1 ml of 5% Hydrogen peroxide is added to it and the reaction stirred for approximately 24 hours at room temperature with regular monitoring using thin layer chromatography. The reaction mixture loaded onto a DEAE cellulose column (2 cm×20 cm long) in the hydroxide form and washed with 200 ml of distilled water. Bound material is eluted using a 0-400 mM gradient of triethylammonium bicarbonate (TEAB) buffer with 10 ml fractions being collected. Elution of compound 2 containing product is monitored by a ultraviolet flow through device. Fractions collected containing the UV absorbance is evaporated to dryness over four co-evaporations with methanol/water to remove TEAB. The resulting material is Compound 194. The purity is checked with thin layered chromatography on PEI cellulose matrix developed with 0.4M ammonium bicarbonate solution.
Compound 193 (0.504 gm, 1 mmol) is dissolved in 10 ml of Dimethyl formamide and 5 ml of water is added to the mixture.
L-cysteine (0.50 gm) is added to the mixture and stirred till it dissolved. The reaction mixture is purged with nitrogen and stirred for 30 minutes. 1 ml of 5% Hydrogen peroxide is added to it and the reaction stirred for approximately 24 hours at room temperature with regular monitoring using thin layer chromatography. The reaction mixture loaded onto a DEAE cellulose column (2 cm×20 cm long) in the hydroxide form and washed with 200 ml of distilled water. Bound material is eluted using a 0-400 mM gradient of triethylammonium bicarbonate (TEAB) buffer with 10 ml fractions being collected. Elution of compound 2 containing product is monitored by a ultraviolet flow through device. Fractions collected containing the UV absorbance is evaporated to dryness over four co-evaporations with methanol/water to remove TEAB. The resulting material is compound 195 The purity is checked with thin layered chromatography on PEI cellulose matrix developed with 0.4M ammonium bicarbonate solution.
Biphenyl-4,4′-dicarboxylic acid (2.42 g, 10 mmol) is taken in a 100 ml round bottomed flask. Methylene chloride (50 ml) is added to the flask. Oxalyl chloride (2.52 gm, 20 mmol) is added to the flask. 2 drops of DMF is added as a catalyst. The system is flushed with nitrogen and refluxed for 24 hours. The progress is monitored using thin layer chromatography. The resulting acid chloride is used in the next step.
L-cysteine hydrochloride methyl ester (2.625 gm, 25 mmol) is dissolved in a 100 ml round bottomed flask and Methylene chloride (50 ml) is added to it and stirred. Triethylamine (3.1 gm, 30 mmol) is added to it drop by drop under constant stirring. Once all the L-cysteine hydrochloride methyl ester has dissolved the acid chloride generated in the earlier step is added to the reaction mixture drop wise. Triethylamine (5.15 gm, 50 mmol) is added to the mixture and the stirring continued for around 12 hours. The reaction progress is monitored using thin layered chromatography. The reaction is quenched by adding water (15 ml). The mixture is separated on a separatory column. The organic layer is collected and washed three times with d.i water (15 ml×3). The layer is evaporated to collect the crude product. The crude product is purified on a silica column to obtain compound 196.
Compound 196 (0.476 gm, 1 mmol) is dissolved in 10 ml of Dimethyl formamide and 5 ml of water is added to the mixture. Glutathione (0.76 gm) is added to the mixture and stirred till it dissolved. The reaction mixture is purged with nitrogen and stirred for 30 minutes. 1 ml of 5% Hydrogen peroxide is added to it and the reaction stirred for approximately 24 hours at room temperature with regular monitoring using thin layer chromatography. The reaction mixture loaded onto a DEAE cellulose column (2 cm×20 cm long) in the hydroxide form and washed with 200 ml of distilled water. Bound material is eluted using a 0-400 mM gradient of triethylammonium bicarbonate (TEAB) buffer with 10 ml fractions being collected. Elution of compound 2 containing product is monitored by a ultraviolet flow through device. Fractions collected containing the UV absorbance is evaporated to dryness over four co-evaporations with methanol/water to remove TEAB. The resulting material is Compound 197. The purity is checked with thin layered chromatography on PEI cellulose matrix developed with 0.4M ammonium bicarbonate solution.
Compound 196 (0.476 gm, 1 mmol) is dissolved in 10 ml of Dimethyl formamide and 5 ml of water is added to the mixture.
L-cysteine (0.50 gm) is added to the mixture and stirred till it dissolved. The reaction mixture is purged with nitrogen and stirred for 30 minutes. 1 ml of 5% Hydrogen peroxide is added to it and the reaction stirred for approximately 24 hours at room temperature with regular monitoring using thin layer chromatography. The reaction mixture loaded onto a DEAE cellulose column (2 cm×20 cm long) in the hydroxide form and washed with 200 ml of distilled water. Bound material is eluted using a 0-400 mM gradient of triethylammonium bicarbonate (TEAB) buffer with 10 ml fractions being collected. Elution of compound 2 containing product is monitored by a ultraviolet flow through device. Fractions collected containing the UV absorbance is evaporated to dryness over four co-evaporations with methanol/water to remove TEAB. The resulting material is compound 198. The purity is checked with thin layered chromatography on PEI cellulose matrix developed with 0.4M ammonium bicarbonate solution.
Compounds 199-207
Starting Material: 2,2′-imidobenzoic acid. Aldrich Catalog number: 308935. M.W: 257.24
2,2′-imidobenzoic acid (2.57 g, 10 mmol) is taken in a 100 ml round bottomed flask. Methylene chloride (50 ml) is added to the flask. Oxalyl chloride (2.52 gm, 20 mmol) is added to the flask. The system is flushed with nitrogen and stirred for 24 hours. The reaction mixture may be warmed or refluxed if the progress is slow. The progress is monitored using thin layer chromatography. The resulting acid chloride is used in the next step.
Cysteamine hydrochloride (2.825 gm, 25 mmol) is dissolved in a 100 ml round bottomed flask and Methylene chloride (50 ml) is added to it and stirred. Triethylamine (3.1 gm, 30 mmol) is added to it drop by drop under constant stirring. Once all the cysteamine hydrochloride has dissolved the acid chloride generated in the earlier step is added to the reaction mixture drop wise. Triethylamine (5.15 gm, 50 mmol) is added to the mixture and the stirring continued for around 12 hours. The reaction progress is monitored using thin layered chromatography. The reaction is quenched by adding water (15 ml). The mixture is separated on a separatory column. The organic layer is collected and washed three times with d.i water (15 ml×3). The layer is evaporated to collect the crude product. The crude product is purified on a silica column to obtain compound 199.
Compound 199 (0.375 gm, 1 mmol) is dissolved in 10 ml of Dimethyl formamide and 5 ml of water is added to the mixture. Glutathione (0.76 gm) is added to the mixture and stirred till it dissolved. The reaction mixture is purged with nitrogen and stirred for 30 minutes. 1 ml of 5% Hydrogen peroxide is added to it and the reaction stirred for approximately 24 hours at room temperature with regular monitoring using thin layer chromatography. The reaction mixture loaded onto a DEAE cellulose column (2 cm×20 cm long) in the hydroxide form and washed with 200 ml of distilled water. Bound material is eluted using a 0-400 mM gradient of triethylammonium bicarbonate (TEAB) buffer with 10 ml fractions being collected. Elution of compound 2 containing product is monitored by a ultraviolet flow through device. Fractions collected containing the UV absorbance is evaporated to dryness over four co-evaporations with methanol/water to remove TEAB. The resulting material is compound 200. The purity is checked with thin layered chromatography on PEI cellulose matrix developed with 0.4M ammonium bicarbonate solution.
Compound 199 (0.375 gm, 1 mmol) is dissolved in 10 ml of Dimethyl formamide and 5 ml of water is added to the mixture.
L-cysteine (0.50 gm) is added to the mixture and stirred till it dissolved. The reaction mixture is purged with nitrogen and stirred for 30 minutes. 1 ml of 5% Hydrogen peroxide is added to it and the reaction stirred for approximately 24 hours at room temperature with regular monitoring using thin layer chromatography. The reaction mixture loaded onto a DEAE cellulose column (2 cm×20 cm long) in the hydroxide form and washed with 200 ml of distilled water. Bound material is eluted using a 0-400 mM gradient of triethylammonium bicarbonate (TEAB) buffer with 10 ml fractions being collected. Elution of compound 2 containing product is monitored by a ultraviolet flow through device. Fractions collected containing the UV absorbance is evaporated to dryness over four co-evaporations with methanol/water to remove TEAB. The resulting material is Compound 201. The purity is checked with thin layered chromatography on PEI cellulose matrix developed with 0.4M ammonium bicarbonate solution.
2,2′-imidobenzoic acid (2.57 g, 10 mmol) is taken in a 100 ml round bottomed flask. Methylene chloride (50 ml) is added to the flask. Oxalyl chloride (2.52 gm, 20 mmol) is added to the flask. The system is flushed with nitrogen and stirred for 24 hours. The reaction mixture may be warmed or refluxed if the progress is slow. The progress is monitored using thin layer chromatography. The resulting acid chloride is used in the next step.
L-cysteine hydrochloride ethyl ester (2.825 gm, 25 mmol) is dissolved in a 100 ml round bottomed flask and Methylene chloride (50 ml) is added to it and stirred. Triethylamine (3.1 gm, 30 mmol) is added to it drop by drop under constant stirring. Once all the L-cysteine hydrochloride ethyl ester has dissolved the acid chloride generated in the earlier step is added to the reaction mixture drop wise. Triethylamine (5.15 gm, 50 mmol) is added to the mixture and the stirring continued for around 12 hours. The reaction progress is monitored using thin layered chromatography. The reaction is quenched by adding d.i water (15 ml). The mixture is separated on a separatory column. The organic layer is collected and washed three times with d.i water (15 ml×3). The layer is evaporated to collect the crude product. The crude product is purified on a silica column to obtain compound 202.
Compound 202 (0.519 gm, 1 mmol) is dissolved in 10 ml of Dimethyl formamide and 5 ml of water is added to the mixture. Glutathione (0.76 gm) is added to the mixture and stirred till it dissolved. The reaction mixture is purged with nitrogen and stirred for 30 minutes. 1 ml of 5% Hydrogen peroxide is added to it and the reaction stirred for approximately 24 hours at room temperature with regular monitoring using thin layer chromatography. The reaction mixture loaded onto a DEAE cellulose column (2 cm×20 cm long) in the hydroxide form and washed with 200 ml of distilled water. Bound material is eluted using a 0-400 mM gradient of triethylammonium bicarbonate (TEAB) buffer with 10 ml fractions being collected. Elution of compound 2 containing product is monitored by a ultraviolet flow through device. Fractions collected containing the UV absorbance is evaporated to dryness over four co-evaporations with methanol/water to remove TEAB. The resulting material is Compound 203. The purity is checked with thin layered chromatography on PEI cellulose matrix developed with 0.4M ammonium bicarbonate solution.
Compound 202 (0.519 gm, 1 mmol) is dissolved in 10 ml of Dimethyl formamide and 5 ml of water is added to the mixture.
L-cysteine (0.50 gm) is added to the mixture and stirred till it dissolved. The reaction mixture is purged with nitrogen and stirred for 30 minutes. 1 ml of 5% Hydrogen peroxide is added to it and the reaction stirred for approximately 24 hours at room temperature with regular monitoring using thin layer chromatography. The reaction mixture loaded onto a DEAE cellulose column (2 cm×20 cm long) in the hydroxide form and washed with 200 ml of distilled water. Bound material is eluted using a 0-400 mM gradient of triethylammonium bicarbonate (TEAB) buffer with 10 ml fractions being collected. Elution of compound 2 containing product is monitored by a ultraviolet flow through device. Fractions collected containing the UV absorbance is evaporated to dryness over four co-evaporations with methanol/water to remove TEAB. The resulting material is compound 204. The purity is
2,2′-imidobenzoic acid (2.57 g, 10 mmol) is taken in a 100 ml round bottomed flask. Methylene chloride (50 ml) is added to the flask. Oxalyl chloride (2.52 gm, 20 mmol) is added to the flask. The system is flushed with nitrogen and stirred for 24 hours. The reaction mixture may be warmed or refluxed if the progress is slow. The progress is monitored using thin layer chromatography. The resulting acid chloride is used in the next step.
L-cysteine hydrochloride methyl ester (2.625 gm, 25 mmol) is dissolved in a 100 ml round bottomed flask and Methylene chloride (50 ml) is added to it and stirred. Triethylamine (3.1 gm, 30 mmol) is added to it drop by drop under constant stirring. Once all the L-cysteine hydrochloride methyl ester has dissolved the acid chloride generated in the earlier step is added to the reaction mixture drop wise. Triethylamine (5.15 gm, 50 mmol) is added to the mixture and the stirring continued for around 12 hours. The reaction progress is monitored using thin layered chromatography. The reaction is quenched by adding water (15 ml). The mixture is separated on a separatory column. The organic layer is collected and washed three times with d.i water (15 ml×3). The layer is evaporated to collect the crude product. The crude product is purified on a silica column to obtain compound 205.
Compound 205 (0.491 gm, 1 mmol) is dissolved in 10 ml of Dimethyl formamide and 5 ml of water is added to the mixture. Glutathione (0.76 gm) is added to the mixture and stirred till it dissolved. The reaction mixture is purged with nitrogen and stirred for 30 minutes. 1 ml of 5% Hydrogen peroxide is added to it and the reaction stirred for approximately 24 hours at room temperature with regular monitoring using thin layer chromatography. The reaction mixture loaded onto a DEAE cellulose column (2 cm×20 cm long) in the hydroxide form and washed with 200 ml of distilled water. Bound material is eluted using a 0-400 mM gradient of triethylammonium bicarbonate (TEAB) buffer with 10 ml fractions being collected. Elution of compound 2 containing product is monitored by a ultraviolet flow through device. Fractions collected containing the UV absorbance is evaporated to dryness over four co-evaporations with methanol/water to remove TEAB. The resulting material is Compound 206. The purity is checked with thin layered chromatography on PEI cellulose matrix developed with 0.4M ammonium bicarbonate solution.
Compound 205 (0.491 gm, 1 mmol) is dissolved in 10 ml of Dimethyl formamide and 5 ml of water is added to the mixture.
L-cysteine (0.50 gm) is added to the mixture and stirred till it dissolved. The reaction mixture is purged with nitrogen and stirred for 30 minutes. 1 ml of 5% Hydrogen peroxide is added to it and the reaction stirred for approximately 24 hours at room temperature with regular monitoring using thin layer chromatography. The reaction mixture loaded onto a DEAE cellulose column (2 cm×20 cm long) in the hydroxide form and washed with 200 ml of distilled water. Bound material is eluted using a 0-400 mM gradient of triethylammonium bicarbonate (TEAB) buffer with 10 ml fractions being collected. Elution of compound 2 containing product is monitored by a ultraviolet flow through device. Fractions collected containing the UV absorbance is evaporated to dryness over four co-evaporations with methanol/water to remove TEAB. The resulting material is compound 207. The purity is checked with thin layered chromatography on PEI cellulose matrix developed with 0.4M ammonium bicarbonate solution.
Compounds 208-216
Starting Material: 2,2′-bipyridine-5,5′-dicarboxylic acid. Aldrich Catalog number: 517763. M.W: 244.20
2,2′-bipyridine-5,5′-dicarboxylic acid (2.44 g, 10 mmol) is taken in a 100 ml round bottomed flask. Methylene chloride (50 ml) is added to the flask. Oxalyl chloride (2.52 gm, 20 mmol) is added to the flask. The system is flushed with nitrogen and stirred for 24 hours. The reaction mixture may be warmed or refluxed if the progress is slow. The progress is monitored using thin layer chromatography. The resulting acid chloride is used in the next step.
Cysteamine hydrochloride (2.825 gm, 25 mmol) is dissolved in a 100 ml round bottomed flask and Methylene chloride (50 ml) is added to it and stirred. Triethylamine (3.1 gm, 30 mmol) is added to it drop by drop under constant stirring. Once all the cysteamine hydrochloride has dissolved the acid chloride generated in the earlier step is added to the reaction mixture drop wise. Triethylamine (5.15 gm, 50 mmol) is added to the mixture and the stirring continued for around 12 hours. The reaction progress is monitored using thin layered chromatography. The reaction is quenched by adding water (15 ml). The mixture is separated on a separatory column. The organic layer is collected and washed three times with d.i water (15 ml×3). The layer is evaporated to collect the crude product. The crude product is purified on a silica column to obtain compound 208.
Compound 208 (0.362 gm, 1 mmol) is dissolved in 10 ml of Dimethyl formamide and 5 ml of water is added to the mixture. Glutathione (0.76 gm) is added to the mixture and stirred till it dissolved. The reaction mixture is purged with nitrogen and stirred for 30 minutes. 1 ml of 5% Hydrogen peroxide is added to it and the reaction stirred for approximately 24 hours at room temperature with regular monitoring using thin layer chromatography. The reaction mixture loaded onto a DEAE cellulose column (2 cm×20 cm long) in the hydroxide form and washed with 200 ml of distilled water. Bound material is eluted using a 0-400 mM gradient of triethylammonium bicarbonate (TEAB) buffer with 10 ml fractions being collected. Elution of compound 2 containing product is monitored by a ultraviolet flow through device. Fractions collected containing the UV absorbance is evaporated to dryness over four co-evaporations with methanol/water to remove TEAB. The resulting material is compound 209. The purity is checked with thin layered chromatography on PEI cellulose matrix developed with 0.4M ammonium bicarbonate solution.
Compound 208 (0.362 gm, 1 mmol) is dissolved in 10 ml of Dimethyl formamide and 5 ml of water is added to the mixture.
L-cysteine (0.50 gm) is added to the mixture and stirred till it dissolved. The reaction mixture is purged with nitrogen and stirred for 30 minutes. 1 ml of 5% Hydrogen peroxide is added to it and the reaction stirred for approximately 24 hours at room temperature with regular monitoring using thin layer chromatography. The reaction mixture loaded onto a DEAE cellulose column (2 cm×20 cm long) in the hydroxide form and washed with 200 ml of distilled water. Bound material is eluted using a 0-400 mM gradient of triethylammonium bicarbonate (TEAB) buffer with 10 ml fractions being collected. Elution of compound 2 containing product is monitored by a ultraviolet flow through device. Fractions collected containing the UV absorbance is evaporated to dryness over four co-evaporations with methanol/water to remove TEAB. The resulting material is Compound 210. The purity is checked with thin layered chromatography on PEI cellulose matrix developed with 0.4M ammonium bicarbonate solution.
2,2′-bipyridine-5,5′-dicarboxylic acid (2.44 g, 10 mmol) is taken in a 100 ml round bottomed flask. Methylene chloride (50 ml) is added to the flask. Oxalyl chloride (2.52 gm, 20 mmol) is added to the flask. The system is flushed with nitrogen and stirred for 24 hours. The reaction mixture may be warmed or refluxed if the progress is slow. The progress is monitored using thin layer chromatography. The resulting acid chloride is used in the next step.
L-cysteine hydrochloride ethyl ester (2.825 gm, 25 mmol) is dissolved in a 100 ml round bottomed flask and Methylene chloride (50 ml) is added to it and stirred. Triethylamine (3.1 gm, 30 mmol) is added to it drop by drop under constant stirring. Once all the L-cysteine hydrochloride ethyl ester has dissolved the acid chloride generated in the earlier step is added to the reaction mixture drop wise. Triethylamine (5.15 gm, 50 mmol) is added to the mixture and the stirring continued for around 12 hours. The reaction progress is monitored using thin layered chromatography. The reaction is quenched by adding d.i water (15 ml). The mixture is separated on a separatory column. The organic layer is collected and washed three times with d.i water (15 ml×3). The layer is evaporated to collect the crude product. The crude product is purified on a silica column to obtain compound 211.
Compound 211 (0.506 gm, 1 mmol) is dissolved in 10 ml of Dimethyl formamide and 5 ml of water is added to the mixture. Glutathione (0.76 gm) is added to the mixture and stirred till it dissolved. The reaction mixture is purged with nitrogen and stirred for 30 minutes. 1 ml of 5% Hydrogen peroxide is added to it and the reaction stirred for approximately 24 hours at room temperature with regular monitoring using thin layer chromatography. The reaction mixture loaded onto a DEAE cellulose column (2 cm×20 cm long) in the hydroxide form and washed with 200 ml of distilled water. Bound material is eluted using a 0-400 mM gradient of triethylammonium bicarbonate (TEAB) buffer with 10 ml fractions being collected. Elution of compound 2 containing product is monitored by a ultraviolet flow through device. Fractions collected containing the UV absorbance is evaporated to dryness over four co-evaporations with methanol/water to remove TEAB. The resulting material is Compound 212. The purity is checked with thin layered chromatography on PEI cellulose matrix developed with 0.4M ammonium bicarbonate solution.
Compound 211 (0.506 gm, 1 mmol) is dissolved in 10 ml of Dimethyl formamide and 5 ml of water is added to the mixture.
L-cysteine (0.50 gm) is added to the mixture and stirred till it dissolved. The reaction mixture is purged with nitrogen and stirred for 30 minutes. 1 ml of 5% Hydrogen peroxide is added to it and the reaction stirred for approximately 24 hours at room temperature with regular monitoring using thin layer chromatography. The reaction mixture loaded onto a DEAE cellulose column (2 cm×20 cm long) in the hydroxide form and washed with 200 ml of distilled water. Bound material is eluted using a 0-400 mM gradient of triethylammonium bicarbonate (TEAB) buffer with 10 ml fractions being collected. Elution of compound 2 containing product is monitored by a ultraviolet flow through device. Fractions collected containing the UV absorbance is evaporated to dryness over four co-evaporations with methanol/water to remove TEAB. The resulting material is compound 213. The purity is checked with thin layered chromatography on PEI cellulose matrix developed with 0.4M ammonium bicarbonate solution.
2,2′bipyridine-5,5′-dicarboxylic acid (2.44 g, 10 mmol) is taken in a 100 ml round bottomed flask. Methylene chloride (50 ml) is added to the flask. Oxalyl chloride (2.52 gm, 20 mmol) is added to the flask. The system is flushed with nitrogen and stirred for 24 hours. The reaction mixture may be warmed or refluxed if the progress is slow. The progress is monitored using thin layer chromatography. The resulting acid chloride is used in the next step.
L-cysteine hydrochloride methyl ester (2.625 gm, 25 mmol) is dissolved in a 100 ml round bottomed flask and Methylene chloride (50 ml) is added to it and stirred. Triethylamine (3.1 gm, 30 mmol) is added to it drop by drop under constant stirring. Once all the L-cysteine hydrochloride methyl ester has dissolved the acid chloride generated in the earlier step is added to the reaction mixture drop wise. Triethylamine (5.15 gm, 50 mmol) is added to the mixture and the stirring continued for around 12 hours. The reaction progress is monitored using thin layered chromatography. The reaction is quenched by adding water (15 ml). The mixture is separated on a separatory column. The organic layer is collected and washed three times with d.i water (15 ml×3). The layer is evaporated to collect the crude product. The crude product is purified on a silica column to obtain compound 214.
Compound 214 (0.478 gm, 1 mmol) is dissolved in 10 ml of Dimethyl formamide and 5 ml of water is added to the mixture. Glutathione (0.76 gm) is added to the mixture and stirred till it dissolved. The reaction mixture is purged with nitrogen and stirred for 30 minutes. 1 ml of 5% Hydrogen peroxide is added to it and the reaction stirred for approximately 24 hours at room temperature with regular monitoring using thin layer chromatography. The reaction mixture loaded onto a DEAE cellulose column (2 cm×20 cm long) in the hydroxide form and washed with 200 ml of distilled water. Bound material is eluted using a 0-400 mM gradient of triethylammonium bicarbonate (TEAB) buffer with 10 ml fractions being collected. Elution of compound 2 containing product is monitored by a ultraviolet flow through device. Fractions collected containing the UV absorbance is evaporated to dryness over four co-evaporations with methanol/water to remove TEAB. The resulting material is Compound 215. The purity is checked with thin layered chromatography on PEI cellulose matrix developed with 0.4M ammonium bicarbonate solution.
Compound 214 (0.478 gm, 1 mmol) is dissolved in 10 ml of Dimethyl formamide and 5 ml of water is added to the mixture.
L-cysteine (0.50 gm) is added to the mixture and stirred till it dissolved. The reaction mixture is purged with nitrogen and stirred for 30 minutes. 1 ml of 5% Hydrogen peroxide is added to it and the reaction stirred for approximately 24 hours at room temperature with regular monitoring using thin layer chromatography. The reaction mixture loaded onto a DEAE cellulose column (2 cm×20 cm long) in the hydroxide form and washed with 200 ml of distilled water. Bound material is eluted using a 0-400 mM gradient of triethylammonium bicarbonate (TEAB) buffer with 10 ml fractions being collected. Elution of compound 2 containing product is monitored by a ultraviolet flow through device. Fractions collected containing the UV absorbance is evaporated to dryness over four co-evaporations with methanol/water to remove TEAB. The resulting material is compound 216. The purity is checked with thin layered chromatography on PEI cellulose matrix developed with 0.4M ammonium bicarbonate solution.
Starting Material: 1,1-Doxo-2,6-diphenyl thiomorpholine-3,5 dicarboxylic acid dimethyl ester. Aldrich Catalog number: S-246719. M.W: 403.457
1,1-Doxo-2,6-diphenyl thiomorpholine-3,5 dicarboxylic acid dimethyl ester (4.03 g, 10 mmol) is taken in a 100 ml round bottomed flask. Methylene chloride (50 ml) is added to the flask. Oxalyl chloride (2.52 gm, 20 mmol) is added to the flask. The system is flushed with nitrogen and stirred for 24 hours. The reaction mixture may be warmed or refluxed if the progress is slow. The progress is monitored using thin layer chromatography. The resulting acid chloride is used in the next step.
Cysteamine hydrochloride (2.825 gm, 25 mmol) is dissolved in a 100 ml round bottomed flask and Methylene chloride (50 ml) is added to it and stirred. Triethylamine (3.1 gm, 30 mmol) is added to it drop by drop under constant stirring. Once all the cysteamine hydrochloride has dissolved the acid chloride generated in the earlier step is added to the reaction mixture drop wise. Triethylamine (5.15 gm, 50 mmol) is added to the mixture and the stirring continued for around 12 hours. The reaction progress is monitored using thin layered chromatography. The reaction is quenched by adding water (15 ml). The mixture is separated on a separatory column. The organic layer is collected and washed three times with d.i water (15 ml×3). The layer is evaporated to collect the crude product. The crude product is purified on a silica column to obtain compound 217.
Compound 217 (0.493 gm, 1 mmol) is dissolved in 10 ml of Dimethyl formamide and 5 ml of water is added to the mixture. Glutathione (0.76 gm) is added to the mixture and stirred till it dissolved. The reaction mixture is purged with nitrogen and stirred for 30 minutes. 1 ml of 5% Hydrogen peroxide is added to it and the reaction stirred for approximately 24 hours at room temperature with regular monitoring using thin layer chromatography. The reaction mixture loaded onto a DEAE cellulose column (2 cm×20 cm long) in the hydroxide form and washed with 200 ml of distilled water. Bound material is eluted using a 0-400 mM gradient of triethylammonium bicarbonate (TEAB) buffer with 10 ml fractions being collected. Elution of compound 2 containing product is monitored by a ultraviolet flow through device. Fractions collected containing the UV absorbance is evaporated to dryness over four co-evaporations with methanol/water to remove TEAB. The resulting material is compound 218. The purity is checked with thin layered chromatography on PEI cellulose matrix developed with 0.4M ammonium bicarbonate solution.
Compound 217 (0.493 gm, 1 mmol) is dissolved in 10 ml of Dimethyl formamide and 5 ml of water is added to the mixture.
L-cysteine (0.50 gm) is added to the mixture and stirred till it dissolved. The reaction mixture is purged with nitrogen and stirred for 30 minutes. 1 ml of 5% Hydrogen peroxide is added to it and the reaction stirred for approximately 24 hours at room temperature with regular monitoring using thin layer chromatography. The reaction mixture loaded onto a DEAE cellulose column (2 cm×20 cm long) in the hydroxide form and washed with 200 ml of distilled water. Bound material is eluted using a 0-400 mM gradient of triethylammonium bicarbonate (TEAB) buffer with 10 ml fractions being collected. Elution of compound 2 containing product is monitored by a ultraviolet flow through device. Fractions collected containing the UV absorbance is evaporated to dryness over four co-evaporations with methanol/water to remove TEAB. The resulting material is Compound 219. The purity is checked with thin layered chromatography on PEI cellulose matrix developed with 0.4M ammonium bicarbonate solution.
1,1-Doxo-2,6-diphenyl thiomorpholine-3,5 dicarboxylic acid dimethyl ester (4.03 g, 10 mmol) is taken in a 100 ml round bottomed flask. Methylene chloride (50 ml) is added to the flask. Oxalyl chloride (2.52 gm, 20 mmol) is added to the flask. The system is flushed with nitrogen and stirred for 24 hours. The reaction mixture may be warmed or refluxed if the progress is slow. The progress is monitored using thin layer chromatography. The resulting acid chloride is used in the next step.
L-cysteine hydrochloride ethyl ester (2.825 gm, 25 mmol) is dissolved in a 100 ml round bottomed flask and Methylene chloride (50 ml) is added to it and stirred. Triethylamine (3.1 gm, 30 mmol) is added to it drop by drop under constant stirring. Once all the L-cysteine hydrochloride ethyl ester has dissolved the acid chloride generated in the earlier step is added to the reaction mixture drop wise. Triethylamine (5.15 gm, 50 mmol) is added to the mixture and the stirring continued for around 12 hours. The reaction progress is monitored using thin layered chromatography. The reaction is quenched by adding d.i water (15 ml). The mixture is separated on a separatory column. The organic layer is collected and washed three times with d.i water (15 ml×3). The layer is evaporated to collect the crude product. The crude product is purified on a silica column to obtain compound 220.
Compound 220 (0.637 gm, 1 mmol) is dissolved in 10 ml of Dimethyl formamide and 5 ml of water is added to the mixture. Glutathione (0.76 gm) is added to the mixture and stirred till it dissolved. The reaction mixture is purged with nitrogen and stirred for 30 minutes. 1 ml of 5% Hydrogen peroxide is added to it and the reaction stirred for approximately 24 hours at room temperature with regular monitoring using thin layer chromatography. The reaction mixture loaded onto a DEAE cellulose column (2 cm×20 cm long) in the hydroxide form and washed with 200 ml of distilled water. Bound material is eluted using a 0-400 mM gradient of triethylammonium bicarbonate (TEAB) buffer with 10 ml fractions being collected. Elution of compound 2 containing product is monitored by a ultraviolet flow through device. Fractions collected containing the UV absorbance is evaporated to dryness over four co-evaporations with methanol/water to remove TEAB. The resulting material is Compound 221. The purity is checked with thin layered chromatography on PEI cellulose matrix developed with 0.4M ammonium bicarbonate solution.
Compound 220 (0.637 gm, 1 mmol) is dissolved in 10 ml of Dimethyl formamide and 5 ml of water is added to the mixture.
L-cysteine (0.50 gm) is added to the mixture and stirred till it dissolved. The reaction mixture is purged with nitrogen and stirred for 30 minutes. 1 ml of 5% Hydrogen peroxide is added to it and the reaction stirred for approximately 24 hours at room temperature with regular monitoring using thin layer chromatography. The reaction mixture loaded onto a DEAE cellulose column (2 cm×20 cm long) in the hydroxide form and washed with 200 ml of distilled water. Bound material is eluted using a 0-400 mM gradient of triethylammonium bicarbonate (TEAB) buffer with 10 ml fractions being collected. Elution of compound 2 containing product is monitored by a ultraviolet flow through device. Fractions collected containing the UV absorbance is evaporated to dryness over four co-evaporations with methanol/water to remove TEAB. The resulting material is compound 222. The purity is checked with thin layered chromatography on PEI cellulose matrix developed with 0.4M ammonium bicarbonate solution.
1,1-Doxo-2,6-diphenyl thiomorpholine-3,5 dicarboxylic acid dimethyl ester (4.03 g, 10 mmol) is taken in a 100 ml round bottomed flask. Methylene chloride (50 ml) is added to the flask. Oxalyl chloride (2.52 gm, 20 mmol) is added to the flask. The system is flushed with nitrogen and stirred for 24 hours. The reaction mixture may be warmed or refluxed if the progress is slow. The progress is monitored using thin layer chromatography. The resulting acid chloride is used in the next step.
L-cysteine hydrochloride methyl ester (2.625 gm, 25 mmol) is dissolved in a 100 ml round bottomed flask and Methylene chloride (50 ml) is added to it and stirred. Triethylamine (3.1 gm, 30 mmol) is added to it drop by drop under constant stirring. Once all the L-cysteine hydrochloride methyl ester has dissolved the acid chloride generated in the earlier step is added to the reaction mixture drop wise. Triethylamine (5.15 gm, 50 mmol) is added to the mixture and the stirring continued for around 12 hours. The reaction progress is monitored using thin layered chromatography. The reaction is quenched by adding water (15 ml). The mixture is separated on a separatory column. The organic layer is collected and washed three times with d.i water (15 ml×3). The layer is evaporated to collect the crude product. The crude product is purified on a silica column to obtain compound 223.
Compound 223 (0.609 gm, 1 mmol) is dissolved in 10 ml of Dimethyl formamide and 5 ml of water is added to the mixture. Glutathione (0.76 gm) is added to the mixture and stirred till it dissolved. The reaction mixture is purged with nitrogen and stirred for 30 minutes. 1 ml of 5% Hydrogen peroxide is added to it and the reaction stirred for approximately 24 hours at room temperature with regular monitoring using thin layer chromatography. The reaction mixture loaded onto a DEAE cellulose column (2 cm×20 cm long) in the hydroxide form and washed with 200 ml of distilled water. Bound material is eluted using a 0-400 mM gradient of triethylammonium bicarbonate (TEAB) buffer with 10 ml fractions being collected. Elution of compound 2 containing product is monitored by a ultraviolet flow through device. Fractions collected containing the UV absorbance is evaporated to dryness over four co-evaporations with methanol/water to remove TEAB. The resulting material is Compound 224. The purity is checked with thin layered chromatography on PEI cellulose matrix developed with 0.4M ammonium bicarbonate solution.
Compound 223 (0.491 gm, 1 mmol) is dissolved in 10 ml of Dimethyl formamide and 5 ml of water is added to the mixture.
L-cysteine (0.50 gm) is added to the mixture and stirred till it dissolved. The reaction mixture is purged with nitrogen and stirred for 30 minutes. 1 ml of 5% Hydrogen peroxide is added to it and the reaction stirred for approximately 24 hours at room temperature with regular monitoring using thin layer chromatography. The reaction mixture loaded onto a DEAE cellulose column (2 cm×20 cm long) in the hydroxide form and washed with 200 ml of distilled water. Bound material is eluted using a 0-400 mM gradient of triethylammonium bicarbonate (TEAB) buffer with 10 ml fractions being collected. Elution of compound 2 containing product is monitored by a ultraviolet flow through device. Fractions collected containing the UV absorbance is evaporated to dryness over four co-evaporations with methanol/water to remove TEAB. The resulting material is compound 225. The purity is
Other Compounds
In the synthesis examples for compounds 2,5, 8, 11, 14, 17, 20, 23, 26, 29, 32, 35, 38, 41, 44, 47, 50, 53, 56, 59, 62, 65, 68, 71, 74, 77, 80, 83, 86, 89, 92, 95, 98, 101, 104, 107, 110, 113, 116, 119, 122, 125, 128, 131, 134, 137, 140, 143, 146, 149, 152, 155, 158, 161, 164, 167, 170, 173, 176, 179, 182, 185, 188, 191, 194, 197, 200, 203, 206, 209, 212, 215, 218, 221 and 224 the glutathione is replaced with one of the following compounds: alphadihydrolipoic acid, cystamine, thiolphosphate, 5′thioladenosine, L-homocysteine, co-enzyme A, 2-mercaptoethanol, dithiothreitol, iodoacetate, bromoacetate, fluoroacetate or chloroacetate.
The hydrogen peroxide causes oxidation of the two —SH groups on each compound to be oxidized to a disulfide linkage (—S—S—).
This application is a division of U.S. patent application Ser. No. 13/763,057 file Feb. 8, 2013, which is a continuation-in-part of U.S. patent application Ser. No. 13/565,047 filed 2 Aug. 2012, which is a continuation of U.S. patent application Ser. No. 12/731,415 filed on 25 Mar. 2010, the full disclosures are incorporated herein by reference.
| Number | Date | Country | |
|---|---|---|---|
| Parent | 13763057 | Feb 2013 | US |
| Child | 14147990 | US |
| Number | Date | Country | |
|---|---|---|---|
| Parent | 12731415 | Mar 2010 | US |
| Child | 13565047 | US |
| Number | Date | Country | |
|---|---|---|---|
| Parent | 13565047 | Aug 2012 | US |
| Child | 13763057 | US |
