Patent Application
20080058293
Crotonaldehyde (1.50 mL) was added dropwise over a period of 1 hour to a mixture of 5-amino-2-chlorobenzoic acid (1.72 g), ferrous sulphate heptahydrate (0.77 g), sodium nitrobenzenesulphonate (1.23 g) and concentrated hydrochloric acid (11 mL) at 95° C. The reaction mixture was heated for a further 15 minutes then filtered whilst still hot. The resulting solid was extracted with boiling 2M aqueous hydrochloric acid solution (20 mL) and the extract combined with the filtrate. Ammonium acetate was then added to give a solution of pH 4, which was cooled in ice and the resultant precipitate collected by filtration and washed with water. The solid was dried in vacuo to give the sub-title compound (0.5 g) as a solid.
MS: APCI(+ve) 222/224 (M+1)
To a stirred solution of 6-chloro-2-methyl-5-quinolinecarboxylic acid (Example 1(a) ) (250 mg) in dichloromethane (5 mL) at 0° C. under nitrogen, was added N,N-dimethylformamide (1 drop) and oxalyl chloride (0.4 mL). The reaction mixture was stirred at room temperature for 1 hour, then evaporated to dryness and redissolved in dichloromethane (3 mL). This solution was cooled to 0° C. and a mixture of (R)-2-phenyl-1-propylamine (152 mg) and triethylamine (1 mL) in dichloromethane (2 mL) was added dropwise. The reaction mixture was stirred at room temperature for 10 minutes then poured into saturated NaHCO3 aq. (20 mL). The mixture was extracted with dichloromethane (3×20 mL) and the combined extracts were dried, filtered and evaporated. Purification (SiO2, ethyl acetate:isohexane 1:1 as eluant) afforded the product which was converted to its hydrochloride salt by treatment with hydrochloric acid (4M in 1,4-dioxane) and recrystallised (ethanol/ethyl acetate) to give the title product (40 mg).
1H NMR (400 MHz, d6-DMSO) δ 8.87 (1H, s), 8.15 (1H, d), 7.92 (1H, d), 7.75-7.66 (1H, m), 7.58 (1H, d), 7.40-7.24 (5H, m), 3.81-3.66 (1H, m), 3.52-3.39 (1H, m), 3.13-3.02 (1H, m), 2.80 (3H, s), 1.29 (3H, d). MS: APCI(+ve) 339/341 (M+H+). m.p. 190-192° C.
Prepared according to the method of Example 1(b), using 6-chloro-2-methyl-5-quinolinecarboxylic acid (Example 1(a)) (250 mg) and (S)-2-phenyl-1-propylamine (152 mg). Purification (SiO2, ethyl acetate:isohexane 1:1 as eluant) afforded the product which was converted to its hydrochloride salt by treatment with hydrochloric acid (4M in 1,4-dioxane) and recrystallised (ethanol/ethyl acetate) to give the title product (38 mg).
1H NMR (400 MHz, d6-DMSO) δ 8.89 (1H, t), 8.18 (1H, d), 7.94 (1H, d), 7.73 (1H, d), 7.60 (1H, d), 7.38-7.25 (5H, m), 3.80-3.68 (1H, m), 3.48-3.40 (1H, m), 3.14-3.04 (1H, m), 2.81 (3H, s), 1.29 (3H, d). MS: APCI(+ve) 339/341 (M+H+). m.p. 182-185° C.
6-Chloro-5-nitroquinoline 1-oxide (4 g) was added to phosphorus oxychloride (15 mL) at 0° C. The solution was allowed to warm to room temperature and stirred for 12 hours. The excess phosphorus oxychloride was evaporated in vacuo and the residue dissolved in water (100 mL)/dichloromethane (100 mL). The layers were separated and the aqueous layer extracted with dichloromethane (2×50 mL). The combined extracts were dried over anhydrous magnesium sulfate, filtered and concentrated to give an oil. The residue was dissolved in ethanol/water (1:1, 80 mL), ammonium chloride (2.8 g) and iron (2.8 g) added. The mixture was stirred at 65° C. for 4 hours, cooled to room temperature and filtered. The resulting solid was suspended in dimethylsulphoxide (50 mL), methanol (50 mL) and aqueous hydrochloric acid added (2M, 100 mL). The resulting solid was removed by filtration and then treated with ether (50 mL) and isohexane (50 mL). Evaporation of the mixture afforded the sub-title compound as a solid (1 g).
1H NMR (400 MHz, d6-DMSO) δ 8.73 (1H, dd,); 7.62 (1H, d); 7.51 (1H, d); 7.13 (1H, dd); 6.36 (2H, s). MS: APCI(+ve) 213.1/214.9 (M+1)
To a stirred solution of 2,6-dichloroquinolin-5-amine (prepared as described in 3(a) above) (450 mg) in N-methyl pyrrolidinone (6 mL) was added 4-N,N-dimethylaminopyridine (512 mg), (R)-3-phenylbutyric acid (515 mg) and PyBroP (2 g). The reaction mixture was heated to 50° C. for 5 hours. The mixture was cooled to room temperature and poured into water (10 mL) which was subsequently acidified to pH1 with aqueous 2M hydrochloric acid. The resulting solution was extracted with dichloromethane (3×20 mL). The combined organic extracts were dried, filtered and evaporated. Purification (SiO2, methanol:dichloromethane 1:10 as eluant) and recrystallisation (ethyl acetate) afforded the sub-title compound as a solid (400 mg).
1H NMR (400 MHz, d6-DMSO) δ 10.07 (1H, s), 7.90 (2H, s), 7.63-7.55 (1H, m), 7.47 (1H, d), 7.42-7.25 (5H, m), 3.36-3.27 (1H, m), 2.83 (1H, dd), 2.73 (1H, dd), 1.34 (3H, d).
To a stirred solution of (βR)-N-(2,6-dichloro-5-quinolinyl)-β-methyl-benzenepropanamide (Example 3(b)) (200 mg) and potassium carbonate (385 mg) in N-methyl pyrrolidinone (2 mL) was added N,N′-dimethyl-1,3-propanediamine (570 mg). The mixture was heated at 120° C. for 1 hour after which it was cooled and poured into water. The mixture was extracted with dichloromethane and the combined extracts were dried, filtered and evaporated. Purification by HPLC (Waters Symmetry column using 25% to 95% acetonitrile in 0.1% aqueous trifluoroacetic acid) afforded the title product (250 mg).
1H NMR (400 MHz, d6-DMSO) δ 9.91 (1H, s), 8.50 (1H, s), 7.73-7.55 (1H, m), 7.53-7.42 (1H, m), 7.40-7.31 (3H, m), 7.30-7.23 (2H, m), 7.13-7.02 (1H, m), 3.76 (2H, t), 3.31 (1H, q), 3.18 (3H, s), 2.99-2.87 (2H, m), 2.79 (1H, dd), 2.70 (1H, dd), 2.60-2.54 (3H, m), 1.93 (2H, quint.), 1.33 (3H, d). MS: APCI(+ve) 425.2/427.2 (M+H+). m.p. 159-162° C.
Prepared according to the method of Example 3(c), using (βR)-N-(2,6-dichloro-5-quinolinyl)-β-methyl-benzenepropanamide (Example 3(b)) (200 mg) and piperazine (580 mg). Purification (SiO2, methanol:dichloromethane:ammonium hydroxide solution 15:85:1 as eluant) afforded the title compound as a solid (25 mg).
1H NMR (400 MHz, d6-DMSO) δ 9.79 (1H, s), 7.54 (1H, d), 7.44 (1H, d), 7.40-7.22 (6H, m), 7.07 (1H, d), 3.59 (4H, t), 3.38-3.25 (1H, m), 2.82-2.73 (5H, m), 2.68 (1H, dd), 1.33 (3H, d). MS: APCI(+ve) 409.2/411.2 (M+H+). m.p. 194-196° C.
Prepared according to the method of Example 1, using 6-chloro-2-methyl-5-quinolinecarboxylic acid (Example 1(a)) (60 mg) and benzeneethanamine (33 mg). Purification (SiO2, ethyl acetate:isohexane 3:7 as eluant) afforded the title compound as a solid (15 mg).
1H NMR (400 MHz, d6-DMSO) δ 8.81 (1H, t), 7.93 (1H, d), 7.73 (1H, d), 7.63 (1H, d), 7.40 (1H, d), 7.37-7.23 (5H, m), 3.65 (2H, q), 2.90 (2H, t), 2.65 (3H, s). MS: APCI(+ve) 325/327 (M+H+). m.p. 170-172° C.
9-Borabicyclo[3.3.1]nonane dimer solution (2.7 mL, 0.5 M in tetrahydrofuran) was added to ethyl(2-propenyl)-carbamic acid, 1,1-dimethylethyl ester (prepared as described in Example 7(iv) of WO 03/041707) (124 mg) at room temperature under nitrogen. The mixture was refluxed for 2 hours after which it was cooled to room temperature. Potassium phosphate (356 mg) in water (1 mL) was added and the mixture stirred for 15 minutes. (βR)-N-(2,6-Dichloro-5-quinolinyl)-β-methyl-benzenepropanamide (Example 3(b)) (200 mg) in N,N-dimethylformamide (2 mL) was added followed by tetrakis(triphenylphosphine)palladium(0) (7 mg). The reaction mixture was heated to 70° C. for 2 hours under nitrogen. On cooling to room temperature the reaction mixture was filtered through diatomaceous earth and the tetrahydrofuran removed under vacuum. The resulting mixture was poured into water and extracted with ethyl acetate. The combined organic extracts were dried, filtered and evaporated. Purification (SiO2, ethyl acetate:isohexane 30:70 as eluant) gave the sub-title compound (250 mg).
1H NMR (400 MHz, d6-DMSO) δ 9.94 (1H, s), 7.86 (1H, d), 7.77 (1H, d), 7.55-7.45 (1H, m), 7.45-7.21 (6H, m), 3.40-3.26 (1H, m), 3.25-3.09 (4H, m), 2.91-2.78 (3H, m), 2.76-2.65 (1H, m), 1.98-1.90 (2H, m), 1.44-1.27 (12H, m), 1.03 (3H, t).
[3-[6-Chloro-5-[[(3R)-1-oxo-3-phenylbutyl]amino]-2-quinolinyl]propyl]ethyl-carbamic acid, 1,1-dimethylethyl ester (Example 6(a)) was dissolved in dichloromethane (3 mL). Hydrochloric acid (HCl) in 1,4-dioxane (4M, 0.8 mL) was added and the mixture stirred for 2 hours. The resultant suspension was evaporated to dryness and recrystallised from methanol/ethyl acetate to give the title compound as a solid (170 mg).
1H NMR (400 MHz, d6-DMSO) δ 10.18 (1H, s), 8.90 (2H, s), 8.04 (1H, d), 7.92 (1H, d), 7.77-7.67 (1H, m), 7.52 (1H, d), 7.41-7.23 (5H, m), 3.39-3.27 (1H, m), 3.12 (2H, t), 3.02-2.81 (5H, m), 2.75 (1H, dd), 2.15 (2H, quint.), 1.34 (3H, d), 1.20 (3H, t). MS: APCI(+ve) 410/412 (M+H+).
Prepared according to the method of example 6(a), using (βR)-N-(2,6-dichloro-5-quinolinyl)-β-methyl-benzenepropanamide (Example 3(b)) (200 mg) and [3-[[(1,1-dimethylethyl)dimethylsilyl]oxy]propyl]-2-propenyl-carbamic acid, 1,1-dimethylethyl ester (prepared as described by I. Kadota, S. Saya, Y. Yamamoto, Heterocycles, (1997), Vol. 46, pages 335-348) (221 mg). Purification (SiO2, ethyl acetate:isohexane 1:4 as eluant) afforded the sub-title compound as a solid (300 mg).
1H NMR (400 MHz, CDCl3) δ 7.87 (1H, d), 7.62 (1H, d), 7.44-7.08 (5H, m), 7.15 (1H, s), 7.02 (1H, s), 3.62 (2H, t), 3.48 (1H, q), 3.28 (4H, s), 2.94-2.80 (4H, m 2.08-1.96 (2H, m), 1.74 (2H, s), 1.58 (3H, s), 1.45 (9H, s), 0.88 (9H, s), 0.04 (6H, s).
[3-[6-Chloro-5-[[(3R)-1-oxo-3-phenylbutyl]amino]-2-quinolinyl]propyl][3-[[(1,1-dimethylethyl)dimethylsilyl]oxy]propyl]-carbamic acid, 1,1-dimethylethyl ester (Example 7(a)) was dissolved in dichloromethane (3 mL). HCl in 1,4-dioxane (4M, 1 mL) was added and the mixture stirred for 2 hours. The resultant suspension was evaporated to dryness and the residue was dissolved in dichloromethane (10 mL) and methanol (0.5 mL) and washed with aqueous sodium hydroxide (2M, 3×5 mL). The organics were dried, filtered and evaporated. Purification (SiO2, methanol:dichloromethane:ammonium hydroxide solution 20:80:2 as eluant) afforded the title compound as a solid (85 mg).
1H NMR (400 MHz, d6-DMSO) δ 9.94 (1H, s), 7.86 (1H, d), 7.77 (1H, d), 7.55-7.43 (1H, m), 7.42-7.23 (6H, m), 3.46 (2H, t), 3.40-3.21 (3H, m), 2.92 (2H, t), 2.82 (1H, dd), 2.72 (1H, dd), 2.58-2.47 (2H, m), 1.86 (2H, quint.), 1.55 (2H, quint.), 1.34 (3H, d). MS: APCI(+ve) 440/442 (M+H+). m.p. 118-120° C.
Prepared according to the method of Example 1, using 5-aminoquinoline (200 mg) and 3,4-dichloro-α-methyl-benzenepropanoic acid (652 mg). Purification by HPLC (Symmetry—0.1% aqueous ammonium acetate/acetonitrile) afforded the title compound as a solid (120 mg).
1H NMR (400 MHz, d6-DMSO) δ 9.94 (1H, s), 8.89 (1H, dd), 7.94 (1H, d), 7.85 (1H, d), 7.72 (1H, t), 7.63-7.54 (3H, m), 7.45 (1H, dd), 7.26 (1H, dd), 3.09-2.99 (1H, m), 2.96-2.88 (1H, m), 2.78 (1H, dd), 1.23 (3H, d). MS: APCI(+ve) 359.1/361.1 (M+H+). m.p. 168-170° C.
To a stirred solution of (βR)-N-(2,6-dichloro-5-quinolinyl)-β-methyl-benzenepropanamide (Example 3(b)) (200 mg) and potassium carbonate (380 mg) in N-methyl pyrrolidinone (2 mL) was added 2-[(2-aminoethyl)amino]-ethanol (580 mg). The mixture was heated at 120° C. for 3 hours after which it was cooled and poured into water. The resulting solid was isolated by filtration, dried and suspended in dichloromethane (5 mL). The suspension was then treated with di-tert-butyl dicarbonate (1.6 g) and stirred for 2 hours. The mixture was poured into water and extracted with dichloromethane (3×20 mL). The combined organic layers were dried and concentrated. Purification (SiO2, methanol:dichloromethane:ammonium hydroxide solution 2:98:1 as eluant) yielded the desired major isomer which was then dissolved in dichloromethane (5 mL) and treated with HCl in 1,4-dioxane (4M, 1 mL) for 1 hour. The resultant suspension was evaporated to dryness and recrystallised from methanol/ethyl acetate to give the title compound as a colourless solid (50 mg).
1H NMR (400 MHz, d6-DMSO) δ 9.69 (1H, s), 7.87 (1H, s), 7.67 (1H, d), 7.47 (1H, d), 7.36-7.28 (4H, m), 7.26-7.19 (1H, m), 6.96-6.89 (1H, m), 3.95-3.86 (2H, m), 3.72 (2H, t), 3.34 (1H, q), 3.28 (2H, t), 3.10 (2H, t), 2.86-2.75 (1H, m), 2.75-2.64 (1H, m), 1.34 (3H, d). MS: APCI(+ve) 427/429 (M+H+). m.p. 178-182° C.
To a stirred solution of of 2,6-dichloroquinolin-5-amine (Example 3(a)) (800 mg) and potassium carbonate (2 g) in N-methyl pyrrolidinone (4 mL) was added 1-piperazinecarboxylic acid, 1,1-dimethylethyl ester (2 g). The mixture was heated at 130° C. for 4 hours after which it was cooled and poured into water. The product was collected by filtration and washed with water to give the sub-title compound as a solid (1.2 g).
1H NMR (400 MHz, d6-DMSO) δ 8.36 (1H, d), 7.30 (1H, d), 7.11 (1H, d), 6.82 (1H, d), 5.76 (2H, s), 3.69-3.61 (4H, m), 3.49-3.40 (4H, m), 1.48-1.34 (9H, m).
To a stirred solution of 2-chloro-benzenepropanoic acid (204 mg) in dichloromethane (2 mL) at 0° C. under nitrogen, was added N,N-dimethylformamide (1 drop) and oxalyl chloride (0.3 mL). The reaction mixture was heated to reflux for 2 hours, then cooled, evaporated to dryness and redissolved in dichloromethane (1 mL). This solution was added to a stirred solution of 4-(5-amino-6-chloro-2-quinolinyl)-piperazinecarboxylic acid, 1,1-dimethylethyl ester (Example 10(a)) (200 mg) and potassium carbonate (380 mg) in acetone (2 mL). The reaction mixture was stirred at room temperature for 16 hours then the acetone was evaporated. The residue was redissolved in dichloromethane then poured into water and extracted with dichloromethane (3×20 mL). The combined organic extracts were dried, filtered and evaporated. The resulting solid was purified (SiO2, methanol:dichloromethane:ammonium hydroxide solution 10:90:1 as eluant) then redissolved in methanol and treated with HCl in 1,4-dioxane (4M, 1 mL) for 1 hour. The resultant suspension was evaporated to dryness and recrystallised from methanol/ethyl acetate to give the title compound as a solid (90 mg).
1H NMR (400 MHz, d6-DMSO) δ 10.09 (1H, s), 9.40 (2H, s), 7.89 (1H, d), 7.83-7.69 (2H, m), 7.50-7.26 (5H, m), 4.04 (4H, s), 3.25 (4H, s), 3.08 (2H, t), 2.83 (2H, t). MS: APCI(+ve) 429 (M+H+). m.p. 265-270° C.
Prepared according to method of Example 10(b) using 4-(5-amino-6-chloro-2-quinolinyl)-1-piperazinecarboxylic acid, 1,1-dimethylethyl ester (Example 10(a)) (200 mg) and 2,4-dichloro-benzenepropanoic acid (242 mg). Purification by HPLC (Symmetry—0.1% aqueous ammonium acetate/acetonitrile), treatment with HCl in 1,4-dioxane (4M, 1 mL) and recrystallisation (methanol/ethyl acetate) afforded the title compound as a solid (29 mg).
1H NMR (400 MHz, d6-DMSO) δ 10.10 (1H, s), 9.39 (2H, s), 7.90 (1H, d), 7.83-7.67 (2H, m), 7.63 (1H, s), 7.50-7.33 (3H, m), 4.03 (4H, s), 3.25 (4H, s), 3.06 (2H, t), 2.82 (2H, t). MS: APCI(+ve) 463(M+H+). m.p. 200° C. (dec)
Prepared according to method of Example 10(b) using 4-(5-amino-6-chloro-2-quinolinyl)-1-piperazinecarboxylic acid, 1,1-dimethylethyl ester (Example 10(a)) (200 mg) and 4-chloro-benzenepropanoic acid (204 mg). Purification (SiO2, methanol:dichloromethane:ammonium hydroxide solution 10:90:1 as eluant), treatment with HCl in 1,4-dioxane (4M, 1 mL) and recrystallisation (ethyl acetate/iso-hexane) afforded the title compound as a solid (17 mg).
1H NMR (400 MHz, d6-DMSO) δ 9.68 (1H, s), 9.30 (1H, s), 7.79 (1H, d), 7.64-7.58 (2H, m), 7.37-7.28 (4H, m), 7.23 (1H, d), 3.98 (4H, t), 3.23 (4H, s), 2.99 (2H, t), 2.78 (2H, m). MS: APCI(+ve) 429/431 (M+H+). m.p. 183-188° C.
To a 10 mL microwave vial was added (βR)-N-(2,6-dichloro-5-quinolinyl)-β-methyl-benzenepropanamide (Example 3(b)) (200 mg), (3S)-3-pyrrolidinamine (145 mg), triethylamine (0.085 mL) and acetonitrile (5 mL). The vial was sealed and heated at 100° C. for 1 hour within a microwave. The reaction was cooled to room temperature and evaporated. Purification (SiO2, methanol:dichloromethane:ammonium hydroxide solution 10:90:1 as eluant) afforded the title compound as a solid (80 mg).
1H NMR (400 MHz, d6-DMSO) δ 9.77 (1H, s), 7.51 (1H, d), 7.43 (1H, d), 7.39-7.30 (5H, m), 7.29-7.23 (1H, m), 6.71 (1H, d), 3.69-3.46 (4H, m), 3.38-3.26 (1H, m), 3.24-3.14 (1H, m), 2.77 (1H, dd), 2.67 (1H, dd), 2.12-2.01 (1H, m), 1.78-1.68 (1H, m), 1.33 (3H, d). MS: APCI(+ve) 409/411 (M+H+). m.p. 204-207° C.
Prepared according to method of Example 10(b) using 4-(5-amino-6-chloro-2-quinolinyl)-1-piperazinecarboxylic acid, 1,1-dimethylethyl ester (Example 10(a)) (200 mg) and 2-methoxy-benzenepropanoic acid (200 mg). Purification by HPLC (Waters Symmetry column using 5% to 50% acetonitrile in 0.1% aqueous trifluoroacetic acid) and recrystallisation (methanol/ethyl acetate) afforded the title compound as a solid (25 mg).
1H NMR (400 MHz, d6-DMSO) δ 9.90 (1H, s), 9.10 (2H, s), 7.78 (1H, d), 7.66 (1H, d), 7.58 (1H, d), 7.34-7.19 (3H, m), 7.00 (1H, d), 6.92 (1H, t), 3.95 (4H, s), 3.83 (3H, s), 3.23 (4H, s), 2.94 (2H, t), 2.74 (2H, t). MS: APCI(+ve) 425/427 (M+H+).
To a 10 mL microwave vial was added (βR)-N-(2,6-dichloro-5-quinolinyl)-β-methyl-benzenepropanamide (Example 3(b)) (300 mg), (3R)-3-pyrrolidinol (220 mg) and acetonitrile (5 mL). The vial was sealed and heated at 100° C. for 45 minutes within a microwave. The reaction was cooled to room temperature and the resulting solid removed by filtration and washed with acetonitrile to afford the sub-title compound (340 mg).
1H NMR (400 MHz, d6-DMSO) δ 9.78 (1H, s), 7.51 (1H, d), 7.44 (1H, d), 7.40-7.31 (5H, m), 7.29-7.23 (1H, m), 6.74 (1H, d), 4.99 (1H, s), 4.41 (1H, s), 3.63-3.53 (2H, m), 3.39-3.22 (3H, m), 2.77 (1H, dd), 2.68 (1H, dd), 2.11-1.98 (1H, m), 1.97-1.88 (1H, m), 1.33 (3H, d).
To a stirred solution of (βR)-N-[6-chloro-2-[(3R)-3-hydroxy-1-pyrrolidinyl]-5-quinolinyl]-β-methyl-benzenepropanamide (Example 15(a)) (340 mg) in dichloromethane was added methanesulphonyl chloride (0.26 mL) and triethylamine (0.46 mL). The reaction was stirred for 12 hours under nitrogen and then purified (SiO2, methanol:dichloromethane:ammonium hydroxide solution 10:90:1 as eluant) to afford the sub-titled compound (250 mg).
1H NMR (400 MHz, d6-DMSO) δ 9.80 (1H, s), 7.55 (1H, d) 7.48 (1H, d), 7.44-7.32 (5H, m), 7.30-7.23 (1H, m), 6.81 (1H, d), 5.45 (1H, s), 3.93-3.69 (3H, m), 3.64-3.51 (1H, m), 3.35-3.29 (1H, m), 3.27 (3H, s), 2.78 (1H, dd), 2.68 (1H, dd), 2.38-2.28 (2H, m), 1.33 (3H, d).
To a 10 mL vial was added (βR)-N-[6-chloro-2-[(3R)-3-[(methylsulfonyl)oxy]-1-pyrrolidinyl]-5-quinolinyl]-β-methyl-benzenepropanamide (Example 15(b)) (130 mg), 3-amino-1-propanol (0.5 mL) and acetonitrile (3 mL). The vial was sealed and heated at 100° C. for 90 minutes within a microwave. The reaction was cooled to room temperature and evaporated. Purification (SiO2, methanol:dichloromethane 1:9 as eluant) and recrystallisation (acetonitrile) afforded the title compound as a solid (21 mg).
1H NMR (400 MHz, CD3OD) δ 7.47 (1H, d), 7.41 (1H, d), 7.30-7.24 (4H, m), 7.23-7.16 (1H, m), 7.02 (1H, d), 6.56 (1H, d), 3.78-3.71 (1H, m), 3.68-3.61 (1H, m), 3.56 (2H, t), 3.51-3.35 (2H, m), 3.33-3.24 (2H, m), 2.82-2.73 (1H, m), 2.71-2.64 (3H, m), 2.25-2.14 (1H, m), 1.90-1.77 (1H, m), 1.67 (2H, dt), 1.32 (3H, d). MS: APCI(+ve) 467/469 (M+H+). m.p. 155-158° C.
A suspension of N-[2-[(3S)-3-amino-1-pyrrolidinyl]-6-chloro-5-quinolinyl]-β-methyl-, (βR)-benzenepropanamide (Example 13) (400 mg) and activated 3A molecular sieves (500 mg) in methanol (10 mL) was treated with (tert-butyldimethylsilyloxy)acetaldehyde (0.17 mL) and the resulting mixture stirred at room temperature for 6 hours. Sodium triacetoxyborohydride (416 mg) was added and the mixture stirred for 16 hours. The reaction mixture was concentrated to dryness. Purification (SiO2, ethyl acetate:isohexane 1:1 as eluant) gave the sub-title compound as a solid (250 mg).
1H NMR (400 MHz, CD3OD) δ 7.52 (1H, d), 7.46 (1H, d), 7.35-7.19 (6H, m), 7.06 (1H, d), 6.61 (1H, d), 3.84-3.63 (4H, m), 3.59-3.48 (2H, m), 3.43-3.28 (2H, m), 2.87-2.64 (4H, m), 2.33-2.20 (1H, m), 1.97-1.84 (1H, m), 1.37 (3H, d), 0.85 (9H, s), 0.04 (6H, s).
Trifluoroacetic acid (2 mL) was added to a stirred solution of (βR)-N-[6-chloro-2-[(3S)-3-[[2-[[(1,1-dimethylethyl)dimethylsilyl]oxy]ethyl]amino]-1-pyrrolidinyl]-5-quinolinyl]-β-methyl-benzenepropanamide (Example 16(a)) (250 mg) in dichloromethane (5 mL). The mixture was stirred at room temperature for 5 hours then concentrated. Purification (SiO2, dichloromethane:methanol:7N ammonia in methanol 97:2:1 as eluant) and further purification (Varian SCX cartridge using methanol (100 mL) and then 7N ammonia in methanol (100 mL) as eluant) gave the title compound as a solid (40 mg).
1H NMR (400 MHz, CD3OD) δ 7.47 (1H, d), 7.41 (1H, d), 7.31-7.24 (4H, m), 7.20 (1H, quintet), 7.02 (1H, d), 6.56 (1H, d), 3.75 (1H, dd), 3.69-3.56 (3H, m), 3.52-3.42 (2H, m), 3.37-3.24 (2H, m), 2.83-2.63 (4H, m), 2.28-2.15 (1H, m), 1.94-1.80 (1H, m), 1.32 (3H, d). MS: APCI(+ve) 453.2/455.2 (M+H+). m.p. 177-182° C.
Prepared according to the method of Example 10(b) using 4-(5-amino-6-chloro-2-quinolinyl)-1-piperazinecarboxylic acid, 1,1-dimethylethyl ester (Example 10(a)) (200 mg) and benzenepropanoic acid (166 mg). Purification (SiO2, dichloromethane:methanol:7N ammonia in methanol 90:10:1 as eluant) and recrystallisation from acetonitrile gave the title compound as a solid (17 mg).
1H NMR (400 MHz, d6-DMSO) δ 9.86 (1H, s), 7.66-7.55 (2H, m), 7.49 (1H, d), 7.38-7.28 (4H, m), 7.28-7.22 (1H, m), 7.18 (1H, d), 3.75-3.66 (4H, m), 3.03-2.89 (6H, m), 2.82-2.72 (2H, m). MS: APCI(+ve) 395/397 (M+H+). m.p. 231-234° C.
To a stirred solution of 2-chloro-benzenepropanoic acid (1 g) in dichloromethane (5 mL) at 0° C. under nitrogen, was added N,N-dimethylformamide (1 drop) and oxalyl chloride (2.4 mL). The reaction mixture was stirred at room temperature for 2 hours, then evaporated to dryness and redissolved in dichloromethane (2 mL). The solution was added to a mixture of 2,6-dichloroquinoline-5-amine (prepared as described in WO2003080579) (400 mg) and potassium carbonate (522 mg) in acetone (10 mL). The reaction mixture was stirred at room temperature for 2 hours. The resulting solid was collected by filtration and subsequently washed with water (10 mL) to give the sub-title compound (420 mg).
1H NMR (400 MHz, d6-DMSO) δ 10.19 (1H, s), 8.08 (1H, d), 7.93 (2H, s), 7.63 (1H, d), 7.52-7.40 (2H, m), 7.37-7.27 (2H, m), 3.09 (2H, t), 2.85 (2H, t). MS: APCI(+ve) 379 (M+H+).
Prepared according to the method of Example 13 using 2-chloro-N-(2,6-dichloro-5-quinolinyl)-benzenepropanamide (Example 18(a)) (420 mg) and (3S)-3-pyrrolidinamine (287 mg). Purification (SiO2, dichloromethane:methanol:7N ammonia in methanol 90:10:1 as eluant) gave the title compound as a solid (335 mg).
1H NMR (400 MHz, CD3OD) δ 7.58-7.39 (3H, m), 7.37-7.26 (2H, m), 7.22-7.13 (2H, m), 6.71 (1H, d), 3.74-3.62 (2H, m), 3.62-3.47 (2H, m), 3.26 (1H, dd), 3.11 (2H, t), 2.80 (2H, t), 2.24-2.10 (1H, m), 1.87-1.73 (1H, m). MS: APCI(+ve) 429/431 (M+H+). m.p. 200-212° C.
Prepared according to the method of Example 16(a) using N-[2-[(3S)-3-amino-1-pyrrolidinyl]-6-chloro-5-quinolinyl]-2-chloro-benzenepropanamide (Example 18) (300 mg) and (tert-butyldimethylsilyloxy)acetaldehyde (0.12 mL). Purification (SiO2, Ethyl acetate:isohexane 2:1 as eluant) gave the sub-title compound (200 mg).
1H NMR (400 MHz, CD3OD) δ 7.56-7.50 (2H, m), 7.45 (1H, d), 7.36-7.27 (2H, m), 7.21-7.14 (2H, m), 6.73 (1H, d), 3.81-3.62 (4H, m), 3.56-3.45 (2H, m), 3.41-3.35 (1H, m), 3.12 (2H, t), 2.85-2.72 (4H, m), 2.29-2.19 (1H, m), 1.92-1.83 (1H, m), 0.81 (9H, s), 0.01 (6H, s).
Hydrochloric acid (2 mL, 4 M solution in 1,4-dioxane) was added to a stirred solution of 2-chloro-N-[6-chloro-2-[(3S)-3-[[2-[[(1,1-dimethylethyl)dimethylsilyl]oxy]ethyl]amino]-1-pyrrolidinyl]-5-quinolinyl]-benzenepropanamide (Example 19(a)) (200 mg). The mixture was stirred at room temperature under nitrogen for 45 minutes then concentrated. Purification (SiO2, dichloromethane:methanol:7N ammonia in methanol 93:7:1 as eluant) gave the title compound as a solid (77 mg).
1H NMR (400 MHz, d6-DMSO) δ 9.86 (1H, s), 7.67 (1H, d), 7.54 (1H, d), 7.50-7.39 (3H, m), 7.37-7.25 (2H, m), 6.85 (1H, d), 4.49 (1H, t), 3.75-3.25 (6H, m), 3.08 (2H, t), 2.79 (2H, t), 2.65 (2H, t), 2.19-2.05 (1H, m), 1.92-1.75 (1H, m). MS: APCI(+ve) 473/475 (M+H+). m.p. 180-182° C.
Prepared according to the method of Example 13 using 2,6-dichloro-5-quinolinamine (prepared as described in WO2003080579) (800 mg) and 4-piperidinecarboxylic acid, ethyl ester (1.8 g). Purification (SiO2, dichloromethane:methanol 99:1 as eluant) gave sub-title compound as a solid (900 mg).
1H NMR (400 MHz, d6-DMSO) δ 8.34 (1H, d), 7.29 (1H, d), 7.14 (1H, d), 6.78 (1H, d), 5.84 (2H, s), 4.40 (2H, d), 4.07 (2H, q), 3.03 (2H, t), 2.69-2.58 (1H, m), 1.90 (2H, d), 1.55 (2H, q), 1.19 (3H, t). MS: APCI(+ve) 334/336 (M+H+).
Prepared according to the method of Example 18 (a) using 1-(5-amino-6-chloro-2-quinolinyl)-4-piperidinecarboxylic acid ethyl ester (Example 20(a)) (200 mg) and 2-chloro-benzenepropanoic acid (330 mg). Solid product was collected by filtration and washed with water to give the sub-title compound (230 mg).
1H NMR (400 MHz, CD3OD) δ 9.91 (1H, s), 7.71 (1H, d), 7.58 (1H, d), 7.53-7.40 (3H, m), 7.38-7.21 (3H, m), 4.43 (2H, d), 4.08 (2H, q), 3.17-3.03 (4H, m), 2.80 (2H, t), 2.72-2.62 (1H, m), 1.93 (2H, d), 1.57 (2H, q), 1.19 (3H, t). MS: APCI(+ve) 500/502 (M+H+).
Potassium hydroxide (100 mg), in water (1 mL) was added to a solution of 1-[6-chloro-5-[[3-(2-chlorophenyl)-1-oxopropyl]amino]-2-quinolinyl]-4-piperidinecarboxylic acid, ethyl ester (Example 20(b)) (230 mg) in methanol (2 mL), in a 10 mL vial. The vial was sealed and heated at 70° C. for 10 minutes within a microwave. The reaction mixture was concentrated and water (10 mL) was added to the residue. The solid was collected by filtration to give the title compound (160 mg).
1H NMR (300 MHz, d6-DMSO) δ 7.73 (1H, d), 7.53-7.38 (4H, m), 7.32-7.20 (2H, m), 7.10 (1H, d), 4.27-4.13 (2H, m), 3.22-2.91 (4H, m), 2.82-2.68 (2H, m), 2.06-1.95 (1H, m), 1.84-1.71 (2H, m), 1.66-1.49 (2H, m). MS: APCI(+ve) 472/474 (M+H+).
To a solution of 5-bromo-6-chloroquinoline (prepared according to the method of Journal of Heterocyclic Chemistry 1967, 4, 410) (3 g), 2-chloro-benzeneethanamine (3.8 g) and triethylamine (1.9 mL) in N-methyl pyrrolidinone (12 mL) was added dichlorobis(triphenylphosphine)palladium (II) (1.2 g). The mixture was heated with stirring at 100° C. under a 6 bar pressure of carbon monoxide for 16 hours after which it was cooled and filtered through diatamaceous earth, washing with methanol. The combined organics were concentrated and the residue was partitioned between dichloromethane (100 mL) and water (100 mL). The layers were separated and the aqueous was extracted with dichloromethane (2×100 mL). The combined organics were washed with 2M aqueous hydrochloric acid (50 mL) and saturated aqueous sodium hydrogen carbonate (50 mL) and then dried, filtered and evaporated. Purification (SiO2, dichloromethane:methanol 95:5 as eluant) gave the sub-title compound as a solid (2 g).
1H NMR (400 MHz, d6-DMSO) δ 9.00-8.86 (2H, m), 8.06 (1H, d), 7.92-7.77 (2H, m), 7.63-7.53 (1H, m), 7.52-7.38 (2H, m), 7.36-7.24 (2H, m), 3.77-3.60 (2H, m), 3.10-2.98 (2H, m).
To a stirred solution of 6-chloro-N-[2-(2-chlorophenyl)ethyl]-5-quinolinecarboxamide (Example 21(a)) (2 g) in acetic acid (20 mL) was added peracetic acid 36-40 wt. % solution in acetic acid (10 mL). The mixture was stirred at room temperature for 16 hours then added to a solution of 10% aqueous sodium sulfite (100 mL) which was subsequently extracted with dichloromethane (3×100 mL). The combined extracts were washed with saturated aqueous sodium hydrogen carbonate (2×50 mL), dried, filtered and evaporated. Purification (SiO2, dichloromethane:methanol 98:2 as eluant) gave the sub-title compound as a solid (1 g).
1H NMR (400 MHz, d6-DMSO) δ 8.97 (1H, t), 8.63 (1H, d), 8.55 (1H, d), 7.87 (1H, d), 7.54-7.37 (4H, m), 7.35-7.27 (2H, m), 3.67 (2H, q), 3.04 (2H, t). MS: APCI(+ve) 361 (M+H+).
Phosphorus oxychloride (6 mL) was added drop wise to a suspension of 6-chloro-N-[2-(2-chlorophenyl)ethyl]-5-quinolinecarboxamide 1-oxide (Example 21(b)) (1 g) in dichloromethane (3 mL) at 0° C. The reaction mixture was then heated to 60° C. for 2 hours then allowed to cool and concentrated. The residue was partitioned between dichloromethane (100 mL) and ice water (50 mL). The organic layer was separated and the aqueous layer was extracted with dichloromethane (3×50 mL). The combined organics were washed with saturated aqueous sodium hydrogen carbonate (50 mL), dried, filtered and evaporated. Purification (SiO2, ethyl acetate:isohexane 1:3 as eluant) gave the sub-title compound (700 mg).
1H NMR (400 MHz, d6-DMSO) δ 8.94 (1H, t), 8.01 (1H, d), 7.90 (2H, t), 7.65 (1H, d), 7.50-7.40 (2H, m), 7.35-7.28 (2H, m), 3.67 (2H, q), 3.03 (2H, t). MS: APCI(+ve) 379/381 (M+H+).
Prepared according to the method of Example 13 using 2,6-dichloro-N-[2-(2-chlorophenyl)ethyl]-5-quinolinecarboxamide (500 mg) and (3S)-3-pyrrolidinamine (354 mg). Purification (SiO2, dichloromethane:methanol:7N ammonia in methanol 95:5:1) gave the title compound as a solid (450 mg).
1H NMR (400 MHz, d6-DMSO) δ 8.77 (1H, t), 7.57-7.39 (5H, m), 7.35-7.27 (2H, m), 6.85 (1H, d), 3.72-3.47 (6H, m), 3.27-3.13 (1H, m), 3.01 (2H, t), 2.13-2.01 (1H, m), 1.80-1.64 (3H, m). MS: APCI(+ve) 429/431 (M+H+). m.p. 196-198° C.
Prepared according to the method of Example 16(a) using 2-[(3S)-3-amino-1-pyrrolidinyl]-6-chloro-N-[2-(2-chlorophenyl)ethyl]-5-quinolinecarboxamide (Example 21) (300 mg) and (tert-butyldimethylsilyloxy)acetaldehyde (0.12 mL). Purification (SiO2, dichloromethane:methanol 95:5 as eluant) gave the sub-title compound (320 mg).
1H NMR (400 MHz, d6-DMSO) δ 8.77 (1H, t), 7.56-7.39 (5H, m), 7.34-7.26 (2H, m), 6.87 (1H, d), 3.76-3.19 (9H, m), 3.01 (2H, t), 2.74-2.63 (2H, m), 2.18-2.05 (1H, m), 1.87-1.75 (1H, m), 0.86 (9H, s), 0.04 (6H, s).
Prepared according to the method of Example 19(b) using 6-chloro-N-[2-(2-chlorophenyl)ethyl]-2-[(3S)-3-[[2-[[(1,1-dimethylethyl)dimethylsilyl]oxy]ethyl]amino]-1-pyrrolidinyl]-5-quinolinecarboxamide (Example 22(a)) (320 mg). Purification by HPLC (Symmetry 0.1% aqueous trifluoroacetic acid/acetonitrile) gave the title compound as a solid (69 mg).
1H NMR (300 MHz, d6-DMSO) δ 8.77 (1H, t), 7.59-7.38 (5H, m), 7.36-7.25 (2H, m), 6.87 (1H, d), 4.51 (1H, s), 3.77-3.19 (7H, m), 3.01 (2H, t), 2.66 (2H, t), 2.20-2.05 (1H, m), 1.91-1.77 (1H, m). MS: APCI(+ve) 473/475 (M+H+). m.p. 170-172° C.
2,6-Dichloroquinoline (30 g) and aluminium trichloride (60 g) were heated to 120° C. with stirring under a nitrogen atmosphere. Bromine (9.2 mL) was added dropwise over 1 hour and the mixture was then stirred at 120° C. for 1 hour before being cooled to room temperature. A methanol/deionised water mixture (150 mL, 1:1) was then slowly added and the mixture was concentrated in vacuo. Dichloromethane (500 mL) and deionised water (250 mL) were added, the layers were separated and the aqueous fraction was extracted with dichloromethane (2×250 mL). The combined organic extracts were washed with saturated aqueous sodium hydrogen carbonate (250 mL) before being dried, filtered and concentrated. Purification by chromatography (SiO2, isohexane:dichloromethane 7:3 as eluant) gave the sub-title compound as a solid (27 g).
1H NMR (400 MHz, CDCl3) δ 8.53 (1H, d), 7.94 (1H, d), 7.78 (1H, d), 7.50 (1H, d). MS: APCI(+ve) 276/278/280/282 (M+H+).
To a stirred solution of 5-bromo-2,6-dichloro-quinoline (23 g) in tetrahydrofuran (300 mL) at 0° C. was added iso-propylmagnesium chloride (2M in tetrahydrofuran, 42 mL) over 2 hours. CO2 was bubbled through the solution for 20 minutes and then methanol (20 mL) was added. The mixture was poured into water (500 mL) and extracted with ethyl acetate. The aqueous layer was acidified with hydrochloric acid (2M in water) to pH2-3 and the resulting solid collected by filtration. The solid was washed with water and dried to afford the sub-titled compound (11.5 g).
1H NMR (400 MHz, d6-DMSO) δ 8.29 (1H, d), 8.07 (1H, d), 7.94 (1H, d), 7.74 (1H, d).
Prepared according to the method of Example 13 using 2,6-dichloro-5-quinolinecarboxylic acid (Example 23(b)) (800 mg) and 4-piperidinecarboxylic acid, ethyl ester (2.7 g). Purification (SiO2, dichloromethane:methanol 99:1 as eluant) and further purification (Varian NH2 cartridge using methanol (100 mL) and then 5% acetic acid in methanol (100 mL) as eluant) gave sub-title compound as a solid (900 mg).
1H NMR (400 MHz, d6-DMSO) δ 7.85 (1H, d), 7.62-7.53 (2H, m), 7.38 (1H, d), 4.43 (2H, d), 4.08 (2H, q), 3.11 (2H, t), 2.72-2.60 (1H, m), 1.97-1.87 (2H, m), 1.56 (2H, q), 1.19 (3H, t). MS: APCI(+ve) 363/365 (M+H+).
Prepared according to the method of Example 1(b) using 6-chloro-2-[4-(ethoxycarbonyl)-1-piperidinyl]-5-quinolinecarboxylic acid (Example 23(c)) (220 mg) and 2,6-dichlorobenzenepropanoic acid (323 mg). Purification (SiO2, dichloromethane:methanol 99:1 as eluant) gave the sub-title compound (240 mg).
1H NMR (400 MHz, d6-DMSO) δ 8.87 (1H, t), 7.67 (1H, d), 7.58-7.48 (4H, m), 7.36-7.30 (2H, m), 4.43 (2H, d), 4.08 (2H, q), 3.56 (2H, q), 3.21 (2H, t), 3.11 (2H, t), 2.73-2.60 (1H, m), 1.93 (2H, d), 1.56 (2H, q), 1.19 (3H, t). MS: APCI(+ve) 534/536 (M+H+).
Prepared according to the method of Example 20(c) using 1-[6-chloro-5-[[[2-(2,6-dichlorophenyl)ethyl]amino]carbonyl]-2-quinolinyl]-4-piperidinecarboxylic acid ethyl ester (Example 23(b)) (240 mg). The reaction mixture was acidified to pH5 using 2 M aqueous hydrochloric acid and the solid was collected by filtration. Purification (Varian NH2 cartridge using methanol (100 mL) and then 5% acetic acid in methanol (100 mL) as eluant) gave the title compound as a solid (115 mg).
1H NMR (300 MHz, d6-DMSO) δ 8.92-8.80 (1H, m), 7.66 (1H, d), 7.57-7.44 (4H, m), 7.38-7.28 (2H, m), 4.42 (2H, d), 3.66-3.46 (2H, m), 3.27-2.97 (5H, m), 2.01-1.81 (2H, m), 1.64-1.45 (2H, m). MS: APCI(+ve) 506 (M+H+). m.p. 262-264° C.
Prepared according to the method of Example 1 using 6-chloro-2-[4-(ethoxycarbonyl)-1-piperidinyl]-5-quinolinecarboxylic acid (Example 23(c)) (220 mg) and 2-chlorobenzeneethanamine (265 mg). Purification (SiO2, dichloromethane:methanol 99:1 as eluant) gave the sub-title compound (160 mg).
1H NMR (400 MHz, d6-DMSO) δ 8.77 (1H, t), 7.60-7.39 (5H, m), 7.35-7.24 (3H, m), 4.42 (2H, d), 4.08 (2H, q), 3.63 (2H, q), 3.10 (2H, t), 3.01 (2H, t), 2.73-2.62 (1H, m), 1.92 (2H, d), 1.55 (2H, q), 1.19 (3H, t). MS: APCI(+ve) 500/502 (M+H+).
Prepared according to the method of Example 20(c) using 1-[6-chloro-5-[[[2-(2-chlorophenyl)ethyl]amino]carbonyl]-2-quinolinyl]-4-piperidinecarboxylic acid ethyl ester (Example 24(a)) (160 mg). Reaction mixture was acidified to pH5 using 2 M aqueous hydrochloric acid and the solid was collected by filtration. Purification (Varian NH2 cartridge using methanol:dichloromethane 1:1 (100 mL) and then acetic acid:methanol:dichloromethane 1:10:10 (100 mL) as eluant) gave the title compound as a solid (70 mg).
1H NMR (300 MHz, d6-DMSO) δ 8.76 (1H, t), 7.61-7.38 (5H, m), 7.37-7.23 (3H, m), 4.41 (2H, d), 3.63 (2H, q), 3.16-2.96 (4H, m), 2.63-2.39 (1H, m), 1.95-1.84 (2H, m), 1.65-1.43 (2H, m). MS: APCI(−ve) 470/472 (M−H+). m.p. 250-253° C.
Prepared according to the method of Example 1 using 6-chloro-2-[4-(ethoxycarbonyl)-1-piperidinyl]-5-quinolinecarboxylic acid (Example 23(c)) (220 mg) and β-phenylbenzeneethanamine (335 mg). Purification (SiO2, dichloromethane as eluant) gave the sub-title compound (250 mg).
1H NMR (300 MHz, d6-DMSO) δ 8.78-8.68 (1H, m), 7.55-6.95 (14H, m), 4.45-4.30 (3H, m), 4.14-3.96 (4H, m), 3.20-2.98 (2H, m), 2.76-2.59 (1H, m), 2.01-1.81 (2H, m), 1.54 (2H, q), 1.19 (3H, t). MS: APCI(+ve) 542/544 (M+H+).
Prepared according to the method of Example 20(c) using 1-[6-chloro-5-[[(2,2-diphenylethyl)amino]carbonyl]-2-quinolinyl]-4-piperidinecarboxylic acid ethyl ester (Example 25(a)) (250 mg). Reaction mixture was acidified to pH 5 using 2M aqueous hydrochloric acid and the solid was collected by filtration. Purification (Varian NH2 cartridge using methanol (100 mL) and then 5% acetic acid in methanol (100 mL) as eluant) gave the title compound as a solid (160 mg).
1H NMR (300 MHz, d6-DMSO) δ 8.73 (1H, t), 7.53-7.19 (12H, m), 7.10 (1H, d), 6.99 (1H, d), 4.46-4.27 (3H, m), 4.01 (2H, t), 3.04 (2H, t), 2.59-2.33 (1H, m), 1.98-1.74 (2H, m), 1.62-1.40 (2H, m). MS: APCI(−ve) 512/514 (M−H+). m.p. 180-185° C.
Prepared according to the method of Example 1 using 6-chloro-2-[4-(ethoxycarbonyl)-1-piperidinyl]-5-quinolinecarboxylic acid (Example 23(c)) (220 mg) and benzeneethanamine (175 mg). The resulting solid was recrystallised from acetonitrile to give the sub-title compound (200 mg).
1H NMR (400 MHz, d6-DMSO) δ 8.71 (1H, t), 7.57-7.47 (3H, m), 7.37-7.19 (6H, m), 4.41 (2H, d), 4.08 (2H, q), 3.60 (2H, q), 3.10 (2H, t), 2.88 (2H, t), 2.72-2.62 (1H, m), 1.93 (2H, d), 1.55 (2H, q), 1.19 (3H, t). MS: APCI(+ve) 466/468 (M+H+).
Prepared according to the method of Example 20(c) using 1-[6-chloro-5-[[(2-phenylethyl)amino]carbonyl]-2-quinolinyl]-4-piperidinecarboxylic acid ethyl ester (Example 26(a)) (200 mg). The reaction mixture was acidified to pH 5 using 2M aqueous hydrochloric acid and the solid was collected by filtration and washed with water to give the title compound (110 mg).
1H NMR (400 MHz, d6-DMSO) δ 12.26 (1H, s), 8.72 (1H, t), 7.59-7.46 (3H, m), 7.36-7.20 (6H, m), 4.41 (2H, d), 3.60 (2H, q), 3.11 (2H, t), 2.88 (2H, t), 2.62-2.53 (1H, m), 1.92 (2H, d), 1.55 (2H, q). MS: APCI(−ve) 436/438 (M−H+). m.p. 260-262° C.
Prepared according to the method of Example 1(b) using 6-chloro-2-[4-(ethoxycarbonyl)-1-piperidinyl]-5-quinolinecarboxylic acid (Example 23(c)) (220 mg) and 2-fluorobenzeneethanamine (216 mg). The resulting solid was recrystallised from acetonitrile to give the sub-title compound (260 mg).
1H NMR (400 MHz, d6-DMSO) δ 8.75 (1H, t), 7.57-7.49 (3H, m), 7.41-7.14 (5H, m), 4.42 (2H, d), 4.08 (2H, q), 3.61 (2H, q), 3.10 (2H, t), 2.92 (2H, t), 2.67 (1H, tt), 1.92 (2H, d), 1.55 (2H, q), 1.19 (3H, t). MS: APCI(+ve) 484/486 (M+H+).
Prepared according to the method of Example 20(c) using 1-[6-chloro-5-[[[2-(2-fluorophenyl)ethyl]amino]carbonyl]-2-quinolinyl]-4-piperidinecarboxylic acid ethyl ester (Example 27(a)) (260 mg). The reaction mixture was acidified to pH 5 using 2M aqueous hydrochloric acid and the solid was collected by filtration and washed with water to give the title compound (125 mg).
1H NMR (400 MHz, d6-DMSO) δ 8.75 (1H, t), 7.57-7.49 (3H, m), 7.41-7.14 (5H, m), 4.41 (2H, d), 3.60 (2H, q), 3.09 (2H, t), 2.92 (2H, t), 2.61-2.52 (1H, m), 1.92 (2H, d), 1.53 (2H, q). MS: APCI(−ve) 454/456 (M−H+). m.p. 270-272° C.
Prepared according to the method of Example 1 using 6-chloro-2-[4-(ethoxycarbonyl)-1-piperidinyl]-5-quinolinecarboxylic acid (Example 23(c)) (220 mg) and 2-methyl-benzeneethanamine (164 mg). The resulting solid was recrystallised from acetonitrile to give the sub-title compound (180 mg).
1H NMR (400 MHz, d6-DMSO) δ 8.76 (1H, t), 7.60-7.51 (3H, m), 7.29-7.13 (5H, m), 4.42 (2H, d), 4.08 (2H, q), 3.54 (2H, q), 3.10 (2H, t), 2.88 (2H, t), 2.73-2.62 (1H, m), 2.35 (3H, s), 1.93 (2H, d), 1.55 (2H, q), 1.19 (3H, t). MS: APCI(+ve) 480/482 (M+H+).
Prepared according to the method of Example 20(c) using 1-[6-chloro-5-[[[2-(2-methylphenyl)ethyl]amino]carbonyl]-2-quinolinyl]-4-piperidinecarboxylic acid ethyl ester (Example 28(a)) (180 mg). The reaction mixture was acidified to pH 5 using 2M aqueous hydrochloric acid and the solid was collected by filtration and washed with water to give the title compound (120 mg).
1H NMR (400 MHz, d6-DMSO) δ 8.88 (1H, s), 8.04-7.83 (1H, m), 7.68 (2H, d), 7.44 (1H, s), 7.26-7.10 (4H, m), 4.43 (2H, d), 3.55 (2H, q), 3.41-3.22 (2H, m), 2.89 (2H, t), 2.72-2.60 (1H, m), 2.35 (3H, s), 1.99 (2H, d), 1.65 (2H, d). MS: APCI(−ve) 450/452 (M−H+). m.p. 237-241° C.
Prepared according to the method of Example 1(b) using 6-chloro-2-[4-(ethoxycarbonyl)-1-piperidinyl]-5-quinolinecarboxylic acid (Example 23(c)) (220 mg) and (PS)-β-methyl-benzeneethanamine (150 mg). The resulting solid was recrystallised from acetonitrile to give the sub-title compound (230 mg).
1H NMR (400 MHz, d6-DMSO) δ 8.67 (1H, t), 7.55-7.47 (2H, m), 7.38-7.23 (6H, m), 7.17 (1H, d), 4.40 (2H, d), 4.07 (2H, q), 3.65 (1H, dt), 3.39 (1H, ddd), 3.15-3.01 (3H, m), 2.71-2.62 (1H, m), 1.92 (2H, d), 1.54 (2H, q), 1.28 (3H, d), 1.18 (3H, t). MS: APCI(+ve) 480/482 (M+H+).
Prepared according to the method of Example 20(c) using 1-[6-chloro-5-[[[(2S)-2-phenylpropyl]amino]carbonyl]-2-quinolinyl]-4-piperidinecarboxylic acid ethyl ester (Example 29 (a)) (230 mg). The reaction mixture was acidified to pH 5 using 2 M aqueous hydrochloric acid and the solid was collected by filtration and washed with water to give the title compound (160 mg).
1H NMR (400 MHz, d6-DMSO) δ 8.35 (1H, t), 7.58 (1H, d), 7.49 (2H, t), 7.35-7.27 (4H, m), 7.26-7.20 (1H, m), 7.16 (1H, d), 4.33 (2H, d), 3.68-3.59 (1H, m), 3.49-3.40 (1H, m), 3.25-3.06 (3H, m), 2.63-2.53 (1H, m), 1.94 (2H, d), 1.62 (2H, q), 1.30 (3H, d). MS: APCI(−ve) 450/452 (M−H+). m.p. 150-153° C.
1-(Phenylmethyl)-4-piperidinamine (3 g) in dichloromethane (10 mL) and triethylamine (4.5 mL) were added dropwise to a stirred solution of triphosgene (1.55 g) in dichloromethane (20 mL) at 0° C. under nitrogen. The reaction mixture was allowed to warm to room temperature and stirred for 30 minutes. The mixture was cooled to 0° C. and formyl-hydrazine (1.4 g) and triethylamine (4.5 mL) were added. The reaction was stirred at room temperature for 1 hour, then evaporated to dryness. Purification (SiO2, methanol:dichloromethane:ammonium hydroxide solution 5:95:1 as eluant) gave the sub-title compound (2.5 g).
MS: APCI(+ve) 277.2 (M+H+).
2-Formyl-N-[1-(phenylmethyl)-4-piperidinyl]-hydrazinecarboxamide (Example 30 (a)) (2.5 g) was divided between 5 10 mL vials. Potassium hydroxide (5 ml, 1 M solution in methanol) was added to each vial and the reactions were heated at 90° C. for 35 minutes within a microwave. The combined reaction mixtures were acidified to pH6 with aqueous 2M hydrochloric acid and then evaporated to dryness. Purification (SiO2, methanol:dichloromethane:acetic acid 15:85:1 as eluant) gave the sub-title compound as an oil (2.2 g).
MS: APCI(+ve) 259.2 (M+H+).
2,4-Dihydro-4-[1-(phenylmethyl)-4-piperidinyl]-3H-1,2,4-triazol-3-one (Example 30(b)) (2.2 g) was divided between 2 10 mL vials. 1,4-Cyclohexadiene (5 mL) and palladium hydroxide (270 mg, 20 wt. % on carbon) were added to each vial and the reactions were heated at 100° C. for 30 minutes within a microwave. The reaction mixtures were combined. Ethanol (50 mL) and water (50 mL) were added and the mixture was filtered through diatomaceous earth and evaporated to give sub-title compound as a solid (720 mg).
MS: APCI(+ve) 169.2 (M+H+).
Prepared according to the method of Example 13, using 2,6-dichloro-N-[2-(2-chlorophenyl)ethyl]-5-quinolinecarboxamide (Example 21(c)) (150 mg) and 2,4-dihydro-4-(4-piperidinyl)-3H-1,2,4-triazol-3-one (Example 30(c)) (200 mg). Purification (SiO2, methanol:dichloromethane 2:98 as eluant) gave the title compound as a solid (60 mg).
1H NMR (400 MHz, d6-DMSO) δ 11.65 (1H, s), 8.78 (1H, t), 7.97 (1H, s), 7.62-7.39 (5H, m), 7.35-7.26 (3H, m), 4.70 (2H, d), 4.13-4.01 (1H, m), 3.63 (2H, q), 3.12-2.96 (4H, m), 1.94 (2H, d), 1.79 (2H, q). MS: APCI(+ve) 511/513 (M+H+).
Prepared according to the method of Example 1 using 6-chloro-2-[4-(ethoxycarbonyl)-1-piperidinyl]-5-quinolinecarboxylic acid (Example 23 (c) (220 mg) and 4-chlorobenzeneethanamine (200 mg). The resulting solid was recrystallised from acetonitrile to give the sub-title compound (107 mg).
1H NMR (400 MHz, d6-DMSO) δ 8.68 (1H, t), 7.56-7.48 (2H, m), 7.43-7.29 (5H, m), 7.20 (1H, d), 4.41 (2H, d), 4.08 (2H, q), 3.60 (2H, q), 3.11 (2H, t), 2.88 (2H, t), 2.73-2.62 (1H, m), 1.92 (2H, d), 1.55 (2H, q), 1.19 (3H, t). MS: APCI(+ve) 502 (M+H+).
Prepared according to the method of Example 20 (c) using 1-[6-chloro-5-[[[2-(4-chlorophenyl)ethyl]amino]carbonyl]-2-quinolinyl]-4-piperidinecarboxylic acid ethyl ester (Example 31 (a)) (107 mg). The reaction mixture was acidified to pH 5 using 2 M aqueous hydrochloric acid and the solid was collected by filtration and washed with water to give the title compound (80 mg).
1H NMR (400 MHz, d6-DMSO) δ 8.45-8.36 (1H, m), 7.64 (1H, d), 7.57 (1H, d), 7.52 (1H, d), 7.37-7.26 (4H, m), 7.22 (1H, d), 4.34 (2H, d), 3.62 (2H, q), 3.23 (2H, t), 2.91 (2H, t), 2.65-2.54 (1H, m), 1.95 (2H, d), 1.64 (2H, q). MS: APCI(−ve) 470/472 (M−H+). m.p. 231-234° C.
Certain compounds such as benzoylbenzoyl adenosine triphosphate (bbATP) are known to be agonists of the P2X7 receptor, effecting the formation of pores in the plasma membrane (Drug Development Research (1996), 37(3), p. 126). Consequently, when the receptor is activated using bbATP in the presence of ethidium bromide (a fluorescent DNA probe), an increase in the fluorescence of intracellular DNA-bound ethidium bromide is observed. The increase in fluorescence can be used as a measure of P2X7 receptor activation and therefore to quantify the effect of a compound on the P2X7 receptor.
In this manner, each of the title compounds of the Examples was tested for antagonist activity at the P2X7 receptor. Thus, the test was performed in 96-well flat bottomed microtitre plates, the wells being filled with 250 μl of test solution comprising 200 μl of a suspension of THP-1 cells (2.5×106 cells/ml) containing 10−4M ethidium bromide, 25 μl of a high potassium buffer solution containing 10−5M bbATP, and 25 μl of the high potassium buffer solution containing 3×10−5M test compound. The plate was covered with a plastics sheet and incubated at 37° C. for one hour. The plate was then read in a Perkin-Elmer fluorescent plate reader, excitation 520 nm, emission 595 nm, slit widths: Ex 15 nm, Em 20 nm. For the purposes of comparison, bbATP (a P2X7 receptor agonist) and pyridoxal 5-phosphate (a P2X7 receptor antagonist) were used separately in the test as controls. From the readings obtained, a pIC50 figure was calculated for each test compound, this figure being the negative logarithm of the concentration of test compound necessary to reduce the bbATP agonist activity by 50%. Each of the compounds of the Examples demonstrated antagonist activity, having a pIC50 figure>5.5. For example, the following table shows the pIC50 figures for a representative selection of compounds:
| Number | Date | Country | Kind |
|---|---|---|---|
| 0302139-1 | Jul 2003 | SE | national |
| Filing Document | Filing Date | Country | Kind | 371c Date |
|---|---|---|---|---|
| PCT/SE04/01144 | 7/21/2004 | WO | 00 | 1/26/2006 |
