Patent Application
20240360109
The present disclosure belongs to the field of biomedicine, specifically related to a cycloalkene derivative regulator, preparation method therefor and application thereof.
Diabetes mellitus is a common endocrine and metabolic disease, which causes metabolic disorders due to multiple reasons, leading to damage to multiple systems and organs. The incidence is high, there are about 425 million diabetes patients in the world, the incidence of diabetes in China is about 10%, of which type II diabetes accounts for 90%, moreover, the prevalence is still increasing, and the age of disease is becoming younger and younger.
At present, there are several types of drugs on the market for type II diabetes, including insulin, biguanides, glucagon-likepeptide 1 (GLP-1) receptor agonists, dipeptidyl peptidase (DPP-IV) inhibitors, sodium-glucose cotransporter 2 (SGLT-2) inhibitors, α-glucosidase inhibitors, etc. among them, GLP-1 receptor agonists are the most concerned.
GLP-1 is a peptide hormone secreted by human intestinal L cells, and its receptors are distributed in islet cells, various gastrointestinal cells, central nervous system and peripheral nervous system neurons. After activation, GLP-1 receptor has physiological effects such as promoting insulin secretion, inhibiting glucagon secretion, inhibiting appetite and delaying gastric emptance. Clinical evidence shows that compared to other hypoglycemic drugs, GLP-1 receptor agonists have better hypoglycemic effects and are less prone to side effects such as hypoglycemia. In addition, it also has additional cardiovascular benefits and can reduce food intake and delay gastric emptying, which is beneficial for weight control.
Currently marketed GLP-1 receptor agonists are polypeptide drugs, most of which require subcutaneous administration, resulting in poor patient compliance, and the bioavailability of oral peptides is very low. So there is a great clinical demand for developing oral small molecule GLP-1 receptor agonists.
At present, there are no approved small molecule GLP-1 receptor agonists, and three small molecule GLP-1 receptor agonists have entered the clinical research stage, such as PF-06882961 and PF-07081532 developed by Pifzer, and TTP273 developed by vTv, all of which are currently in the clinical phase I/II research stage. Among them, PF-06882961 has shown significant hypoglycemic and weight reducing effects in early clinical practice, and its safety is similar to that of polypeptide GLP-1 receptor agonist, which is expected to bring more treatment options for diabetes, obesity and NASH patients in the future.
There is a huge clinical demand for GLP-1 receptor agonists. Oral small molecule GLP-1 receptor agonists with lower costs and better compliance have the potential to treat various metabolic diseases and have broad market prospects.
The object of the present invention is to provide a compound of general formula (I-A), a stereoisomer thereof or a pharmaceutically acceptable salt thereof:
In some further preferred embodiments of the present invention, the compound is further shown as general formula (I′) or (I″):
In some further preferred embodiments of the present invention, the compound is further shown as general formula (I′):
In some further preferred embodiments of the present invention, the compound is further shown as general formula (I):
In some further preferred embodiments of the present invention, in the compounds of the aforementioned general formulas (I-A), (I′), (I″), and (I):
In some further preferred embodiments of the present invention, in the compounds of the aforementioned general formulas (I-A), (I′), (I″), and (I):
In some further preferred embodiments of the present invention, the compound is further shown as general formula (II′) and (IV):
In some further preferred embodiments of the present invention, the compound is further shown as general formula (II′) and (IV):
In some further preferred embodiments of the present invention, the compound is further shown as general formula (II′):
In some further preferred embodiments of the present invention, Raa, and Rbb are each independently selected from the group consisting of hydrogen, deuterium, C1-3 alkyl, C1-3 deuterated alkyl, C1-3 haloalkyl, C1-3 hydroxyalkyl, C1-3 alkoxy, C1-3 haloalkoxy, C3-6 cycloalkyl, 3 to 6 membered heterocyclyl, C6-10 aryl and 5 to 6 membered heteroaryl.
In some further preferred embodiments of the present invention, the compound is further shown in the following general formula:
In some further preferred embodiments of the present invention, the compound is further shown as general formula (II):
In some further preferred embodiments of the present invention, the compound is further shown as general formula (II):
In some further preferred embodiments of the present invention, in the aforementioned general formulas, R1 is each independently selected from the group consisting of hydrogen, deuterium, fluorine, chlorine, cyano, C1-6 alkyl, C1-6 deuterated alkyl, C1-6haloalkyl, C1-6alkoxy, C1-6 deuterated alkoxy, and C1-6 haloalkoxy, preferably hydrogen, deuterium, fluorine, chlorine, cyano, C1-3 alkyl, C1-3 deuterated alkyl, C1-3 haloalkyl, C1-3 alkoxy, C1-3 deuterated alkoxy, and C1-3 haloalkoxy, more preferably hydrogen, deuterium, fluorine, chlorine, cyano, —OCD3, and methoxy.
In some further preferred embodiments of the present invention, in the aforementioned general formulas, R2 is each independently selected from the group consisting of hydrogen, deuterium, fluorine, chlorine, cyano, C1-6 alkyl, C1-6 deuterated alkyl, C1-6haloalkyl, C1-6alkoxy, C1-6 deuterated alkoxy, and C1-6 haloalkoxy, preferably hydrogen, deuterium, fluorine, chlorine, cyano, C1-3 alkyl, C1-3 deuterated alkyl, C1-3 haloalkyl, C1-3 alkoxy, C1-3 deuterated alkoxy, and C1-3 haloalkoxy, more preferably hydrogen, deuterium, fluorine, chlorine, and methyl.
In some further preferred embodiments of the present invention, in the aforementioned general formulas, R3 is each independently selected from the group consisting of hydrogen, deuterium, fluorine, methyl, deuterated methyl, and halomethyl, preferably hydrogen and methyl.
In some further preferred embodiments of the present invention, in the aforementioned general formulas, R4 is each independently selected from the group consisting of hydrogen, deuterium, fluorine, chlorine, cyano, carboxy, C1-6 alkyl, C1-6 deuterated alkyl, and C1-6 haloalkyl, preferably carboxy.
In some further preferred embodiments of the present invention, in the aforementioned general formulas, R4 is selected from the group consisting of hydrogen, deuterium, fluorine, chlorine, cyano, oxo, C1-6 carboxy, C1-6 alkyl, C1-6 deuterated alkyl, C1-6 haloalkyl and 5 to 6 membered heteroaryl comprising 1 to 4 nitrogen atoms, oxygen atoms, or sulfur atoms, wherein the C1-6 carboxy and 5 to 6 membered heteroaryl comprising 1 to 4 nitrogen atoms, oxygen atoms are each optionally further substituted by one or more substituents selected from the group consisting of oxo, halogen, cyano, C1-3 deuterated alkyl, C1-3 haloalkyl, C1-3 alkoxy, C1-3 deuterated alkoxy, and C1-3 haloalkoxy, preferably carboxy and —C(O)OCH3.
In some further preferred embodiments of the present invention, in the aforementioned general formulas, R5 is selected from the group consisting of C1-6 alkyl, C1-6 deuterated alkyl, C1-6 haloalkyl, C1-6 hydroxyalkyl, C1-6 alkoxy, C1-6 haloalkoxy, C3-8 cycloalkyl, 3 to 8 membered heterocyclyl, C6-10 aryl and 5 to 10 membered heteroaryl, optionally further substituted by one or more substituents selected from halogen, C1-6 alkyl, C1-6 deuterated alkyl, C1-6 haloalkyl, C1-6 hydroxyalkyl, C1-6 alkoxy, C1-6 haloalkoxy, C1-6 cyanoalkyl, C3-8 cycloalkyl, and 3 to 8 membered heterocyclyl, preferably C1-3 alkyl, C1-3 deuterated alkyl, C1-3 haloalkyl, C3-6 cycloalkyl, and 3 to 6 membered heterocyclyl, optionally further substituted by one or more substituents selected from the group consisting of halogen, C1-3 alkyl, C1-3 deuterated alkyl, C1-3 haloalkyl, C1-3 cyanoalkyl, C3-6 cycloalkyl, and 3 to 6 membered heterocyclyl, more preferably C3-6 cycloalkyl, and 3 to 6 membered heterocyclyl comprising 1 to 2 nitrogen atoms, oxygen atoms, or sulfur atoms, optionally further substituted by one or more substituents selected from the group consisting of halogen C1-3 alkyl, C1-3 deuterated alkyl, C1-3 cyanoalkyl, and C1-3 haloalkyl, further preferably
In some further preferred embodiments of the present invention, in the aforementioned general formulas, R5 is selected from the group consisting of C1-6 alkyl, C1-6 deuterated alkyl, C1-6 haloalkyl, C1-6 hydroxyalkyl, C1-6 alkoxy, C1-6 haloalkoxy, C3-8 cycloalkyl, 3 to 8 membered heterocyclyl, C6-10 aryl and 5 to 10 membered heteroaryl, optionally further substituted by one or more substituents selected from the group consisting of halogen, C1-6 alkyl, C1-6 deuterated alkyl, C1-6 haloalkyl, C1-6 hydroxyalkyl, C1-6 alkoxy, C1-6 haloalkoxy, C3-8 cycloalkyl, and 3 to 8 membered heterocyclyl, preferably C1-3 alkyl, C1-3 deuterated alkyl, C1-3 haloalkyl, C3-6 cycloalkyl, and 3 to 6 membered heterocyclyl, optionally further substituted by one or more substituents selected from the group consisting of halogen, C1-3 alkyl, C1-3 deuterated alkyl, C1-3 haloalkyl, C3-6 cycloalkyl, and 3 to 6 membered heterocyclyl, more preferably
In some further preferred embodiments of the present invention, in the aforementioned general formulas, M1 is selected from the group consisting of N, C, and (CH)n9.
In some further preferred embodiments of the present invention, in the aforementioned general formulas, M2 is selected from the group consisting of N, C, and (CH)n10.
In some further preferred embodiments of the present invention, in the aforementioned general formulas, n9 or n10 is each independently integer from 0 to 2.
In some further preferred embodiments of the present invention, in the aforementioned general formulas, L1 and L2 are each independently selected from a bond or —(CH2)n1—, preferably bond.
In some further preferred embodiments of the present invention, in the aforementioned general formulas, R1 is each independently selected from the group consisting of hydrogen, deuterium, fluorine, chlorine, cyano, methoxy and —OCD3;
In some further preferred embodiments of the present invention, R1 is each independently selected from the group consisting of hydrogen, deuterium, fluorine, chlorine, cyano, and methoxy;
In some further preferred embodiments of the present invention, the compound is further shown as general formula (III)˜(III-3):
In a further preferred embodiment of the present invention, the compound is further shown as general formula (III)—(III-7):
In some further preferred embodiments of the present invention, the compound is further shown as general formula (III):
In some further preferred embodiments of the present invention, in compounds of general formulas (III)˜(III-7), the stereoisomer thereof or the pharmaceutically acceptable salt thereof, wherein:
In some embodiments, x is 0; In some embodiments, x is 1; In some embodiments, x is 2; In some embodiments, x is 3; In some embodiments, x is 4; In some embodiments, x is 5;
In a further preferred embodiment of the present invention, the compound is further shown as general formula (III′):
preferably
In a further preferred embodiment of the present invention, the compound is further shown as general formula (V-1) and (V-2):
preferably
more preferably
In a further preferred embodiment of the present invention, the compound is further shown as general formula (V-3) and (V-4):
In a further preferred embodiment of the present invention, the compound is further shown as general formula (V-5) and (V-6):
The present invention further relates to a pharmaceutical composition comprising a therapeutically effective dose of any one of the compound of the general formula, the stereoisomer thereof or the pharmaceutically acceptable salt thereof, and one or more pharmaceutically acceptable carriers, diluents or excipients.
The present invention further relates to a use of any one of the compound of the general formula, the stereoisomer thereof or the pharmaceutically acceptable salt thereof, or the pharmaceutical composition in the preparation of a GLP-1 receptor agonist medicament.
The present invention further relates to a use of any one of the compound of the general formula, the stereoisomer thereof or the pharmaceutically acceptable salt thereof, or the pharmaceutical composition comprising the same in the preparation of a medicament for treating metabolic related diseases, wherein the metabolic related diseases are selected from diabetes, obesity or nonalcoholic steatohepatitis related diseases or other related diseases caused by diabetes, obesity or nonalcoholic steatohepatitis.
The present invention further relates to a method for treating metabolic related diseases by the compound of the general formulas, the stereoisomer thereof or the pharmaceutically acceptable salt thereof or the pharmaceutical composition comprising the same.
The present invention also relates to a method for treating, preventing, and/or treating metabolic diseases and related diseases, comprising administering to a patient a therapeutic effective dose of the compound of the general formula, the stereoisomer thereof or the pharmaceutically acceptable salt thereof or the pharmaceutical composition comprising the same.
The present invention also provides a method for treating a disease condition by using the compound or pharmaceutical composition according to the present invention, wherein the disease condition includes, but is not limited to a condition related to a modulator of GLP-1 receptor.
The present invention also relates to a method for treating metabolic related diseases in a mammal, comprising administering a therapeutically effective amount of the compound or the pharmaceutically acceptable salt, ester, prodrug, solvate, hydrate or derivative thereof according to the present invention to the mammal.
Unless otherwise stated, the terms used in the specification and claims have the meanings described below.
The term “alkyl” refers to a saturated aliphatic hydrocarbon group, which is a straight or branched chain group comprising 1 to 20 carbon atoms, preferably an alkyl having 1 to 8 carbon atoms, more preferably an alkyl having 1 to 6 carbon atoms, most preferably an alkyl having 1 to 3 carbon atoms. Non-limiting examples include methyl, ethyl, n-propyl, isopropyl, n-butyl, isobutyl, tert-butyl, sec-butyl, n-pentyl, 1,1-dimethylpropyl, 1,2-dimethylpropyl, 2,2-dimethylpropyl, 1-ethylpropyl, 2-methylbutyl, 3-methylbutyl, n-hexyl, 1-ethyl-2-methylpropyl, 1,1,2-trimethylpropyl, 1,1-dimethylbutyl, 1,2-dimethylbutyl, 2,2-dimethylbutyl, 1,3-dimethylbutyl, 2-ethylbutyl, 2-methylpentyl, 3-methylpentyl, 4-methylpentyl, 2,3-dimethylbutyl, n-heptyl, 2-methylhexyl, 3-methylhexyl, 4-methylhexyl, 5-methylhexyl, 2,3-dimethylpentyl, 2,4-dimethylpentyl, 2,2-dimethylpentyl, 3,3-dimethylpentyl, 2-ethylpentyl, 3-ethylpentyl, n-octyl, 2,3-dimethylhexyl, 2,4-dimethylhexyl, 2,5-dimethylhexyl, 2,2-dimethylhexyl, 3,3-dimethylhexyl, 4,4-dimethylhexyl, 2-ethylhexyl, 3-ethylhexyl, 4-ethylhexyl, 2-methyl-2-ethylpentyl, 2-methyl-3-ethylpentyl, n-nonyl, 2-methyl-2-ethylhexyl, 2-methyl-3-ethylhexyl, 2,2-diethylpentyl, n-decyl, 3,3-diethylhexyl, 2,2-diethylhexyl, and various branched isomers thereof. More preferably, the alkyl group is a lower alkyl having 1 to 6 carbon atoms, and non-limiting examples include methyl, ethyl, n-propyl, isopropyl, n-butyl, isobutyl, tert-butyl, sec-butyl, n-pentyl, 1,1-dimethylpropyl, 1,2-dimethylpropyl, 2,2-dimethylpropyl, 1-ethylpropyl, 2-methylbutyl, 3-methylbutyl, n-hexyl, 1-ethyl-2-methylpropyl, 1,1,2-trimethylpropyl, 1,1-dimethylbutyl, 1,2-dimethylbutyl, 2,2-dimethylbutyl, 1,3-dimethylbutyl, 2-ethylbutyl, 2-methylpentyl, 3-methylpentyl, 4-methylpentyl, 2,3-dimethylbutyl and the like. The alkyl group can be substituted or unsubstituted. When substituted, the substituent group(s) can be substituted at any available connection point. The substituent group(s) is preferably one or more groups independently selected from the group consisting of alkyl, alkenyl, alkynyl, alkoxy, alkylthio, alkylamino, halogen, thiol, hydroxy, nitro, cyano, cycloalkyl, heterocyclyl, aryl, heteroaryl, cycloalkoxy, heterocycloalkoxy, cycloalkylthio, heterocyclylthio, oxo, carboxy and alkoxycarbonyl. The alkyl of the present invention is preferably selected from the group consisting of methyl, ethyl, isopropyl, tert-butyl, haloalkyl, deuterated alkyl, alkoxy-substituted alkyl and hydroxy-substituted alkyl.
The term “alkylene” refers to an alkyl with one hydrogen being further substituted, for example, “methylene” refers to —CH2—, “ethylene” refers to —(CH2)2—, “propylene” refers to —(CH2)3—, “butylene” refers to —(CH2)4— and the like.
The term “alkenylene” refers to an alkenyl group with one hydrogen being further substituted, for example, “ethenylene” refers to —CH2=CH2—, “propenylene” refers to —CH2—=CH2—CH2—, etc. The alkenylene group can be substituted or unsubstituted, and when substituted, the substituent group(s) is preferably one or more groups independently selected from the group consisting of alkyl, alkenyl, alkynyl, alkoxy, alkylthio, alkylamino, halogen, thiol, hydroxy, nitro, cyano, cycloalkyl, heterocyclyl, aryl, heteroaryl, cycloalkoxy, heterocycloalkoxy, cycloalkylthio, and heterocyclylthio. The term “cycloalkyl” refers to a saturated or partially unsaturated monocyclic or polycyclic hydrocarbon substituent group having 3 to 20 carbon atoms, preferably 3 to 12 carbon atoms, more preferably 3 to 8 carbon atoms, further preferably 3 to 6 carbon atoms. Non-limiting examples of monocyclic cycloalkyl include cyclopropyl, cyclobutyl, cyclopentyl, cyclopentenyl, cyclohexyl, cyclohexenyl, cyclohexadienyl, cycloheptyl, cycloheptatrienyl, cyclooctyl and the like. Polycyclic cycloalkyl includes cycloalkyl having a spiro ring, fused ring or bridged ring. The cycloalkyl is preferably cyclopropyl, cyclobutyl, cyclohexyl, cyclopentyl and cycloheptyl.
The term “cycloalkyl” refers to a saturated or partially unsaturated monocyclic or polycyclic hydrocarbon substituent group having 3 to 20 carbon atoms, preferably 3 to 12 carbon atoms, and more preferably 3 to 6 carbon atoms. Non-limiting examples of monocyclic cycloalkyl include cyclopropyl, cyclobutyl, cyclopentyl, cyclopentenyl, cyclohexyl, cyclohexenyl, cyclohexadienyl, cycloheptyl, cycloheptatrienyl, cyclooctyl and the like. Polycyclic cycloalkyl includes cycloalkyl having a spiro ring, fused ring or bridged ring. The cycloalkyl is preferably cyclopropyl, cyclobutyl, cyclohexyl, cyclopentyl and cycloheptyl.
The term “spiro cycloalkyl” refers to a 5 to 20 membered polycyclic group with individual rings connected through one shared carbon atom (called a spiro atom), wherein the rings can contain one or more double bonds, but none of the rings has a completely conjugated π-electron system. The spiro cycloalkyl is preferably 6 to 14 membered spiro cycloalkyl, and more preferably 7 to 10 membered spiro cycloalkyl. According to the number of the spiro atoms shared between the rings, the spiro cycloalkyl can be divided into mono-spiro cycloalkyl, di-spiro cycloalkyl, or poly-spiro cycloalkyl, and the spiro cycloalkyl is preferably a mono-spiro cycloalkyl or di-spiro cycloalkyl, and more preferably 4-membered/4-membered, 4-membered/5-membered, 4-membered/6-membered, 5-membered/5-membered, or 5-membered/6-membered mono-spiro cycloalkyl. Non-limiting examples of spiro cycloalkyl include:
The term “fused cycloalkyl” refers to a 5 to 20 membered all-carbon polycyclic group, wherein each ring in the system shares an adjacent pair of carbon atoms with another ring, wherein one or more rings can contain one or more double bonds, but none of the rings has a completely conjugated π-electron system. The fused cycloalkyl is preferably 6 to 14 membered fused cycloalkyl, and more preferably 7 to 10 membered fused cycloalkyl. According to the number of membered rings, the fused cycloalkyl can be divided into bicyclic, tricyclic, tetracyclic or polycyclic fused cycloalkyl, and the fused cycloalkyl is preferably bicyclic or tricyclic fused cycloalkyl, and more preferably 5-membered/5-membered, or 5-membered/6-membered bicyclic fused cycloalkyl. Non-limiting examples of fused cycloalkyl include:
The term “bridged cycloalkyl” refers to a 5 to 20 membered all-carbon polycyclic group, wherein every two rings in the system share two disconnected carbon atoms, wherein the rings can have one or more double bonds, but none of the rings has a completely conjugated π-electron system. The bridged cycloalkyl is preferably 6 to 14 membered bridged cycloalkyl, and more preferably 7 to 10 membered bridged cycloalkyl. According to the number of membered rings, the bridged cycloalkyl can be divided into bicyclic, tricyclic, tetracyclic or polycyclic bridged cycloalkyl, and the bridged cycloalkyl is preferably bicyclic, tricyclic or tetracyclic bridged cycloalkyl, and more preferably bicyclic or tricyclic bridged cycloalkyl. Non-limiting examples of bridged cycloalkyl include:
The cycloalkyl ring can be fused to the ring of aryl, heteroaryl or heterocyclyl, wherein the ring bound to the parent structure is cycloalkyl. Non-limiting examples include indanyl, tetrahydronaphthyl, benzocycloheptyl and the like. The cycloalkyl can be optionally substituted or unsubstituted. When substituted, the substituent group(s) is preferably one or more group(s) independently selected from the group consisting of alkyl, alkenyl, alkynyl, alkoxy, alkylthio, alkylamino, halogen, thiol, hydroxy, nitro, cyano, cycloalkyl, heterocyclyl, aryl, heteroaryl, cycloalkoxy, heterocycloalkoxy, cycloalkylthio, heterocyclylthio, oxo, carboxy and alkoxycarbonyl.
The term “heterocyclyl” refers to a 3 to 20 membered saturated or partially unsaturated monocyclic or polycyclic hydrocarbon group, wherein one or more ring atoms are heteroatoms selected from the group consisting of N, O and S(O)m (wherein m is an integer of 0 to 2), but excluding —O—O—, —O—S— or —S—S— in the ring, with the remaining ring atoms being carbon atoms. Preferably, the heterocyclyl has 3 to 12 ring atoms wherein 1 to 4 atoms are heteroatoms; more preferably, 3 to 10 ring atoms; and further preferably 3 to 8 ring atoms; and more further preferably 3 to 6 ring atoms wherein 1 to 2 atoms are heteroatoms selected from the group consisting of N, O and S. Non-limiting examples of monocyclic heterocyclyl include pyrrolidinyl, azacyclobutanyl, oxocyclobutanyl, oxocyclohexyl, imidazolidinyl, tetrahydrofuranyl, tetrahydrothienyl, dihydroimidazolyl, dihydrofuranyl, dihydropyrazolyl, dihydropyrrolyl, piperidinyl, piperazinyl, morpholinyl, thiomolinyl, homopiazinyl and pyranyl and the like, and preferably pyrrolidinyl, azacyclobutanyl, oxocyclobutanyl, tetrahydrofuranyl, pyrazolidinyl, morpholinyl,
piperazinyl and pyranyl, and more preferably pyrrolidinyl, azacyclobutanyl, oxocyclobutanyl, piperidinyl,
piperazinyl and pyranyl. Polycyclic heterocyclyl includes a heterocyclyl having a spiro ring, fused ring or bridged ring; wherein the involved heterocyclyl having a spiro ring, fused ring or bridged ring is optionally bonded to other group(s) through single bond, or further bonded to other cycloalkyl, heterocyclyl, aryl and heteroaryl through any two or more atoms in the ring.
The term “spiro heterocyclyl” refers to a 5 to 20 membered polycyclic heterocyclyl group with individual rings connected through one shared atom (called a spiro atom), wherein one or more ring atoms are heteroatoms selected from the group consisting of N, O and S(O)m (wherein m is an integer of 0 to 2), with the remaining ring atoms being carbon atoms, wherein the rings can contain one or more double bonds, but none of the rings has a completely conjugated π-electron system. The spiro heterocyclyl is preferably 6 to 14 membered spiro heterocyclyl, and more preferably 7 to 10 membered spiro heterocyclyl. According to the number of the spiro atoms shared between the rings, the spiro heterocyclyl can be divided into mono-spiro heterocyclyl, di-spiro heterocyclyl, or poly-spiro heterocyclyl, and the spiro heterocyclyl is preferably mono-spiro heterocyclyl or di-spiro heterocyclyl, and more preferably 4-membered/4-membered, 4-membered/5-membered, 4-membered/6-membered, 5-membered/5-membered, or 5-membered/6-membered mono-spiro heterocyclyl. Non-limiting examples of spiro heterocyclyl include:
with another ring, wherein one or more rings can contain one or more double bonds, but none of the rings has a completely conjugated π-electron system, and wherein one or more ring atoms are heteroatoms selected from the group consisting of N, O and S(O)m (wherein m is an integer of 0 to 2), with the remaining ring atoms being carbon atoms. The fused heterocyclyl is preferably 6 to 14 membered fused heterocyclyl, and more preferably 7 to 10 membered fused heterocyclyl. According to the number of membered rings, the fused heterocyclyl can be divided into bicyclic, tricyclic, tetracyclic or polycyclic fused heterocyclyl, and the fused heterocyclyl is preferably bicyclic or tricyclic fused heterocyclyl, and more preferably 5-membered/5-membered or 5-membered/6-membered bicyclic fused heterocyclyl. Non-limiting examples of fused heterocyclyl include:
The term “bridged heterocyclyl” refers to a 5 to 14 membered polycyclic heterocyclyl group, wherein every two rings in the system share two disconnected atoms, wherein the rings can have one or more double bonds, but none of the rings has a completely conjugated π-electron system, and wherein one or more ring atoms are heteroatoms selected from the group consisting of N, O and S(O)m (wherein m is an integer of 0 to 2), with the remaining ring atoms being carbon atoms. The bridged heterocyclyl is preferably 6 to 14 membered bridged heterocyclyl, and more preferably 7 to 10 membered bridged heterocyclyl. According to the number of membered rings, the bridged heterocyclyl can be divided into bicyclic, tricyclic, tetracyclic or polycyclic bridged heterocyclyl, and the bridged heterocyclyl is preferably bicyclic, tricyclic or tetracyclic bridged heterocyclyl, and more preferably bicyclic or tricyclic bridged heterocyclyl. Non-limiting examples of bridged heterocyclyl include:
The heterocyclyl ring can be fused to the ring of aryl, heteroaryl or cycloalkyl, wherein the ring bound to the parent structure is heterocyclyl. Non-limiting examples thereof include:
The heterocyclyl can be optionally substituted or unsubstituted. When substituted, the substituent group(s) is preferably one or more group(s) independently selected from the group consisting of alkyl, alkenyl, alkynyl, alkoxy, alkylthio, alkylamino, halogen, thiol, hydroxy, nitro, cyano, cycloalkyl, heterocyclyl, aryl, heteroaryl, cycloalkoxy, heterocycloalkoxy, cycloalkylthio, heterocyclylthio, oxo, carboxy and alkoxycarbonyl.
The term “aryl” refers to a 6 to 14 membered all-carbon monocyclic ring or polycyclic fused ring (i.e. each ring in the system shares an adjacent pair of carbon atoms with another ring in the system) having a conjugated π-electron system, preferably 6 to 10 membered aryl, more preferably 6 to 8 membered aryl, for example, phenyl and naphthyl. The aryl is more preferably phenyl. The aryl ring can be fused to the ring of heteroaryl, heterocyclyl or cycloalkyl, wherein the ring bound to the parent structure is aryl ring. Non-limiting examples thereof include:
The aryl can be substituted or unsubstituted. When substituted, the substituent group(s) is preferably one or more group(s) independently selected from the group consisting of alkyl, alkenyl, alkynyl, alkoxy, alkylthio, alkylamino, halogen, thiol, hydroxy, nitro, cyano, cycloalkyl, heterocyclyl, aryl, heteroaryl, cycloalkoxy, heterocycloalkoxy, cycloalkylthio, heterocyclylthio, carboxy and alkoxycarbonyl.
The term “heteroaryl” refers to a 5 to 14 membered heteroaromatic system having 1 to 4 heteroatoms selected from the group consisting of O, S and N. The heteroaryl is preferably 5 to 10 membered heteroaryl, more preferably 5 to 10 membered heteroaryl, most preferably 5 or 6 membered heteroaryl, for example imidazolyl, furanyl, thienyl, thiazolyl, pyrazolyl, oxazolyl, pyrrolyl, triazolyl, tetrazolyl, pyridyl, pyrimidinyl, thiadiazolyl, pyrazinyl and the like; preferably triazolyl, thienyl, imidazolyl, pyrazolyl or pyrimidinyl, thiazolyl; and more preferably triazolyl, pyrazolyl thienyl, thiazolyl and pyrimidinyl. The heteroaryl ring can be fused to the ring of aryl, heterocyclyl or cycloalkyl, wherein the ring bound to the parent structure is heteroaryl ring. Non-limiting examples thereof include:
The heteroaryl can be optionally substituted or unsubstituted. When substituted, the substituent group(s) is preferably one or more group(s) independently selected from the group consisting of alkyl, alkenyl, alkynyl, alkoxy, alkylthio, alkylamino, halogen, thiol, hydroxy, nitro, cyano, cycloalkyl, heterocyclyl, aryl, heteroaryl, cycloalkoxy, heterocycloalkoxy, cycloalkylthio, heterocyclylthio, carboxy and alkoxycarbonyl.
The term “alkoxy” refers to an —O-(alkyl) or an —O-(unsubstituted cycloalkyl) group, wherein the alkyl is as defined above, preferably the alkyl containing 1 to 8 carbon atoms, more preferably the alkyl containing 1 to 6 carbon atoms, and more preferably the alkyl containing 1 to 3 carbon atoms. Non-limiting examples of alkoxy include methoxy, ethoxy, propoxy, butoxy, cyclopropyloxy, cyclobutyloxy, cyclopentyloxy, cyclohexyloxy. The alkoxy can be optionally substituted or unsubstituted. When substituted, the substituent group(s) is preferably one or more group(s) independently selected from the group consisting of alkyl, alkenyl, alkynyl, alkoxy, alkylthio, alkylamino, halogen, thiol, hydroxy, nitro, cyano, cycloalkyl, heterocyclyl, aryl, heteroaryl, cycloalkoxy, heterocycloalkoxy, cycloalkylthio, heterocyclylthio, carboxy and alkoxycarbonyl.
The “alkenyl” refers to a chain alkene group, also known as an alkene group, preferably containing 2 to 8 carbon atoms, more preferably 2 to 6 carbon atoms, and most preferably 2 to 3 carbon atoms, for example, ethenyl, 1-propenyl, 2-propenyl, 1-, 2- or 3-butenyl and the like. The alkenyl group can be further substituted by other related group, for example, alkyl, alkenyl, alkynyl, alkoxy, alkylthio, alkylamino, halogen, thiol, hydroxy, nitro, cyano, cycloalkyl, heterocyclyl, aryl, heteroaryl, cycloalkoxy, heterocycloalkoxy, cycloalkylthio, heterocyclylthio, carboxy and alkoxycarbonyl.
The “alkynyl” refers to (CH—C—), preferably an alkyne group containing 2 to 8 carbon atoms, more preferably an alkyne group containing 2 to 6 carbon atoms, and most preferably an alkyne group containing 2 to 3 carbon atoms. The alkynyl group can be further substituted by other related group, for example, alkyl, alkenyl, alkynyl, alkoxy, alkylthio, alkylamino, halogen, thiol, hydroxy, nitro, cyano, cycloalkyl, heterocyclyl, aryl, heteroaryl, cycloalkoxy, heterocycloalkoxy, cycloalkylthio, heterocyclylthio, carboxy and alkoxycarbonyl.
The term “alkynylene” refers to an alkynyl group with one hydrogen being further substituted, for example, “ethynylene” refers to —C≡C—, “propynylene” refers to —C≡C—CH2—, etc. The alkynylene group can be substituted or unsubstituted, and when substituted, the substituent group(s) is preferably one or more groups independently selected from the group consisting of alkyl, alkenyl, alkynyl, alkoxy, alkylthio, alkylamino, halogen, thiol, hydroxy, nitro, cyano, cycloalkyl, heterocyclyl, aryl, heteroaryl, cycloalkoxy, heterocycloalkoxy, cycloalkylthio, and heterocyclylthio.
The “haloalkyl” refers to an alkyl group substituted by one or more halogens, wherein the alkyl is as defined above.
The “haloalkoxy” refers to an alkoxy group substituted by one or more halogens, wherein the alkoxy is as defined above.
The “hydroxyalkyl” refers to an alkyl group substituted by hydroxy(s), wherein the alkyl is as defined above.
The “C1-6 cyanoalkyl” refers to —C1-6 alkyl CN, for example, —CH2CN, —CH2CH2CN, etc.
The “C1-6 carboxy” refers to —C1-5 alkyl COOH.
The “hydroxy” refers to an —OH group.
The “halogen” refers to fluorine, chlorine, bromine or iodine.
The “amino” refers to —NH2.
The “cyano” refers to —CN.
The “nitro” refers to —NO2.
The “carboxy” refers to —C(O)OH.
The “THF” refers to tetrahydrofuran.
The “EtOAc” refers to ethyl acetate.
The “MeOH” refers to methanol.
The “DMF” refers to N,N-dimethylformamide.
The “DIPEA” refers to diisopropylethylamine.
The “TFA” refers to trifluoroacetic acid.
The “MeCN” refers to acetonitrile.
The “DMA” refers to N, N-dimethylacetamide.
The “Et2O” refers to diethyl ether.
The “DCE” refers to 1,2 dichloroethane.
The “DIPEA” refers to N,N-diisopropylethylamine.
The “NBS” refers to N-bromosuccinimide.
The “NIS” refers to N-iodosuccinimide.
The “Cbz-Cl” refers to benzyl chloroformate.
The “Pd2(dba)3” refers to tris(dibenzylideneacetone)dipalladium.
The “Dppf” refers to 1,1′-bis(diphenylphosphino)ferrocene.
The “HATU” refers to 2-(7-azabenzotriazol-1-yl)-N,N,N′,N′-tetramethyluronium hexafluorophosphate.
The “KHMDS” refers to potassium hexamethyldisilazide.
The “LiHMDS” refers to lithium bis(trimethylsilyl)amide.
The “MeLi” refers to methyl lithium.
The “n-BuLi” refers to n-butyl lithium.
The “NaBH(OAc)3” refers to sodium triacetoxyborohydride.
The “” represents a single bond or a double bond.
Different expressions such as “X is selected from the group consisting of A, B, or C”, “X is selected from the group consisting of A, B and C”, “X is A, B or C”, “X is A, B and C” and the like, express the same meaning, that is, X can be any one or more of A, B and C.
The hydrogen described in the present invention can all be substituted by its isotope deuterium, and any hydrogen in a compound involved in the examples of the present invention can also be substituted by deuterium.
“Optional” or “optionally” means that the event or circumstance described subsequently can, but need not, occur, and such a description includes the situation in which the event or circumstance does or does not occur. For example, “the heterocyclyl optionally substituted by an alkyl” means that an alkyl group can be, but need not be, present, and such a description includes the situation of the heterocyclyl being substituted by an alkyl and the heterocyclyl being not substituted by an alkyl.
“Substituted” refers to one or more hydrogen atoms in a group, preferably up to 5, and more preferably 1 to 3 hydrogen atoms, independently substituted by a corresponding number of substituents. It goes without saying that the substituents only exist in their possible chemical position. The person skilled in the art is able to determine whether the substitution is possible or impossible by experiments or theory without paying excessive efforts. For example, the combination of amino or hydroxy having free hydrogen and carbon atoms having unsaturated bonds (such as olefinic) may be unstable.
A “pharmaceutical composition” refers to a mixture of one or more of the compounds according to the present invention or physiologically/pharmaceutically acceptable salts or prodrugs thereof with other chemical components, and other components such as physiologically/pharmaceutically acceptable carriers and excipients. The purpose of the pharmaceutical composition is to facilitate administration of a compound to an organism, which is conducive to the absorption of the active ingredient so as to show biological activity.
A “pharmaceutically acceptable salt” refers to a salt of the compound of the present invention, which is safe and effective in mammals and has the desired biological activity.
3-Fluoro-4-(1-(6-(piperidin-4-yl)pyridine-2-yl)oxo)cyclopropyl)benzonitrile (2 g, 10.04 mmol) and K2CO3 (2.78 g, 20.08 mmol) were dissolved in tetrahydrofuran (30 mL) in a 50 mL reaction flask, then (S)-oxetan-2-ylmethanamine (874 mg, 10.04 mmol) was added, and the reaction solution was stirred at room temperature for 12 hours. The reaction was stopped, water (20 mL) was added to quench the reaction, and the reaction solution was extracted with ethyl acetate (15 mL×2). The combined organic phases were washed with saturated sodium chloride (10 mL), dried over anhydrous sodium sulfate, filtered, and the resulting residue was purified by silica gel column chromatography with petroleum ether and ethyl acetate as eluent system to obtain the title product methyl (S)-4-nitro-3-((oxetan-2-ylmethyl)amino)benzoate (2.0 g, yellow solid) with a yield of 74.8%.
MS m/z (ESI): 267.0 [M+1].
Methyl (S)-4-nitro-3-((2-oxetan-2-ylmethyl)amino)benzoate (3 g, 11.27 mmol) was dissolved in methanol (30 mL), then 10% Pd/C (300 mg) was added, the reaction system was purged with hydrogen gas three times, and the reaction was stirred for 3 hours. The reaction solution was filtered, the organic phase was dried, and then concentrated to dryness by rotary evaporation to obtain the title product methyl (S)-4-amino-3-((oxetan-2-ylmethyl)amino)benzoate (2.6 g, yellow solid) with a yield of 97.7%.
MS m/z (ESI): 237.1 [M+1].
In a 50 mL reaction flask, methyl (S)-4-nitro-3-((oxetan-2-ylmethyl)amino)benzoate (2 g, 8.46 mmol) and p-toluenesulfonic acid (86 mg, 499.41) were dissolved in tetrahydrofuran (100 mL), then 2-chloro-1,1,1-trimethoxyethane (1.3 g, 8.41 mmol) was added, and the reaction solution was stirred at 60° C. for 1 hour. The reaction was stopped, cooled to room temperature, concentrated under reduced pressure, and the resulting residue was purified by silica gel column chromatography with petroleum ether and ethyl acetate as eluent system to obtain the title product methyl (S)-2-(chloromethyl)-1-(oxetan-2-ylmethyl)-1H-benzo[d]imidazole-6-carboxylate (Im-1) (1.3 g, yellow solid) with a yield of 52.0%.
MS m/z (ESI): 295.0 [M+1].
Using methyl 6-chloro-5-nitro-2-nitropicolinate as the starting material and referring to Step 1 of intermediate Im-1, the title product methyl (S)-5-nitro-6-((oxetan-2-ylmethyl)amino)picolinate was obtained.
MS m/z (ESI): 268.1 [M+1].
Using methyl (S)-5-nitro-6-((oxetan-2-ylmethyl)amino)picolinate as the starting material and referring to Step 2 of intermediate Im-1, the title product methyl (S)-5-amino-6-((oxetan-2-ylmethyl)amino)picolinate was obtained.
MS m/z (ESI): 238.1 [M+1].
At room temperature, methyl (S)-5-amino-6-((oxetan-2-ylmethyl)amino)picolinate (340 mg, 1.43 mmol) was dissolved in tetrahydrofuran (5 mL), then a solution of chloroacetic anhydride (257.27 mg, 1.50 mmol) in tetrahydrofuran (5 mL) was added dropwise. The reaction solution was stirred at room temperature for 30 minutes, heated to 60° C., reacted for 2 hours, cooled to room temperature, and LCMS showed the end of the reaction. The reaction solution was diluted with ethyl acetate (30 mL), then washed with saturated sodium bicarbonate solution (15 mL×3) and saturated sodium chloride solution (15 mL×3) The organic phase was dried over anhydrous sodium sulfate, filtered, and concentrated to dryness by rotary evaporation to obtain the title product methyl (S)-2-(chloromethyl)-3-(oxetan-2-ylmethyl)-3H-imidazo[4,5-b]pyridine-5-carboxylate (Im-2) (yellow oil, 0.4 g) with a yield of 94.4%. This crude product was directly used in the next step.
MS m/z (ESI): 296.1 [M+1].
Using methyl 5-fluoro-6-nitronicotinate as the starting material and referring to the synthesis of intermediate Im-2, the product methyl (S)-2-(chloromethyl)-1-(oxetan-2-ylmethyl)-1H-imidazolo[4,5-b]pyridine-6-carboxylate was obtained.
MS m/z (ESI): 296.1 [M+1].
Ethyl 1-(hydroxymethyl)cyclopropane-1-carboxylate (7 g, 48.55 mmol) was dissolved in DCM (100 mL), and DAST (8.61 g, 53.41 mmol) was added thereto at −78° C. The reaction system was naturally raised to room temperature and stirred for 16 hours. After the reaction was completed, 50 mL of water was added thereto. The reaction solution was extracted with dichloromethane (50 mL×2), washed with saturated sodium chloride solution (30 mL×2), dried over anhydrous sodium sulfate, and concentrated to obtain the title product ethyl 1-(fluoromethyl)cyclopropane-1-carboxylate (6.5 g, yellow oil) was with a yield of 91.6%.
1H NMR (400 MHz, CDCl3): δ 4.52 (dd, 1.5 Hz, 2H), 4.17 (q, 2H), 1.41-1.33 (m, 2H), 1.26 (t, 3H), 1.05-0.95 (m, 2H).
Ethyl 1-(fluoromethyl)cyclopropane-1-carboxylate (6.5 g, 44.47 mmol) was dissolved in THE (60 mL), and LiAlH4 (2.53 g, 66.71 mmol) was added thereto in an ice water bath. The reaction system was naturally raised to room temperature and stirred for 16 hours. After the reaction was completed, 15 g of sodium sulfate decahydrate was added thereto to quench the reaction. The reaction solution was filtered and concentrated to obtain the title product (1-(fluoromethyl)cyclopropyl)methanol (3.5 g, yellow oil) with a yield of 75.6%.
1H NMR (400 MHz, CDCl3): δ 4.36 (d, 2H), 3.58 (s, 2H), 0.60 (m, 4H).
(1-(Fluoromethyl)cyclopropyl)methanol (1.3 g, 12.49 mmol) was dissolved in DCM (30 mL), and methylsulfonyl chloride (1.86 g, 16.23 mmol, 1.26 mL) and triethylamine (2.53 g, 24.97 mmol, 3.48 mL) were added dropwise thereto in an ice water bath. The reaction system was stirred at 20° C. After the reaction was completed, saturated NaHCO3 (10 mL) was added dropwise to quench the reaction. The reaction solution was extracted with dichloromethane (20 mL×3), washed with saturated sodium chloride solution (20 mL×2), dried over anhydrous sodium sulfate, and concentrated to obtain the crude (1-(fluoromethyl)cyclopropyl)methylmethanesulfonate (2.0 g, light yellow oil) with a yield of 87.0%.
1H NMR (400 MHz, CDCl3) δ 4.32 (d, 2H), 4.19 (s, 2H), 3.05 (s, 3H), 0.81-0.72 (m, 4H).
(1-(Fluoromethyl)cyclopropyl)methylmethanesulfonate (1.0 g, 5.49 mmol) was dissolved in NH3/i-PrOH-(10 mL), and the reaction system was heated under microwave at 60° C. for 6 hours. After the reaction was completed, the reaction solution was concentrated to obtain the title product (1-(fluoromethyl)cyclopropyl)methanamine (600 mg, yellow oil). The crude product is directly used for the next reaction.
Ethyl 3-fluoro-4-nitrobenzoate (1.24 g, 5.82 mmol) was dissolved in DMF (30 mL), and (1-(fluoromethyl)cyclopropyl)methanamine (600 mg, 5.82 mmol) and K2CO3 (1.61 g, 11.64 mmol) were added thereto. The reaction system was stirred at 20° C. for four hours. After the reaction was completed, 10 mL of water was added thereto. The reaction solution was extracted with ethyl acetate (20 mL×2), washed with saturated sodium chloride solution (20 mL×2), dried over anhydrous sodium sulfate, and concentrated to obtain the crude product. The resulting residue was purified by silica gel column chromatography with petroleum ether and ethyl acetate as eluent system to obtain the title product ethyl 3-(((1-(fluoromethyl)cyclopropyl)methyl)amino)-4-nitrobenzoate (1.2 g, light yellow solid) with a yield of 69.6%.
MS m/z (ESI): 297.1 [M+1].
1H NMR (400 MHz, CDCl3): δ 8.22 (d, 1H), 7.56 (s, 1H), 7.25 (d, 1H), 4.41 (q, 2H), 4.30 (d, 2H), 3.42 (d, 2H), 1.41 (t, 3H), 0.76 (m, 4H).
Ethyl 3-(((1-(fluoromethyl)cyclopropyl)methyl)amino)-4-nitrobenzoate (1.2 g, 4.05 mmol) was dissolved in MeOH-(30 mL), and Pd/C (200 mg, 10% purity) was added thereto. The reaction system was purged with hydrogen gas three times, and stirred at 20° C. for 2 hours. After the reaction was completed, the reaction solution was filtered through diatomaceous earth, and the filtrate was concentrated to obtain the title product ethyl 4-amino-3-(((1-(fluoromethyl)cyclopropyl)methyl)amino)benzoate (1.0 g, yellow solid) with a yield of 92.7%.
MS m/z (ESI): 267.1 [M+1].
Ethyl 4-amino-3-(((1-(fluoromethyl)cyclopropyl)methyl)amino) benzoate (1.0 g, 3.76 mmol) was dissolved in MeCN (30 mL), and p-toluenesulfonic acid (193.99 mg, 1.13 mmol) and 2-chloro-1,1,1-trimethoxyethane (1.16 g, 7.51 mmol) were added thereto. The reaction system was stirred for 4 hours in an oil bath at 60° C. After the reaction was completed, the reaction solution was concentrated to obtain the crude product. The resulting residue was purified by silica gel column chromatography with petroleum ether and ethyl acetate as eluent system to obtain ethyl 2-(chloromethyl)-1-((1-(fluoromethyl)cyclopropyl)methyl)-1H-benzo[d]imidazole-6-carboxylate (700 mg, yellow solid) with a yield of 57.4%.
MS m/z (ESI): 325.1 [M+1].
1H NMR (400 MHz, CDCl3): δ 8.21 (s, 1H), 8.04 (d, 1H), 7.81 (d, 1H), 4.97 (s, 2H), 4.47 (s, 2H), 4.44 (q, 2H), 4.03 (d, 2H), 1.43 (t, 3H), 0.92-0.82 (m, 4H).
Using ethyl 6-chloro-5-nitropicolinate as the starting material and referring to the synthesis of intermediate Im-4, the title product 2-(chloromethyl)-3-(((1-(fluoromethyl)cyclopropyl)methyl)-3H-imidazolo[4,5-b]pyridine-5-carboxylate was obtained.
MS m/z (ESI): 326.10 [M+1].
Using methyl 5-fluoro-6-nitronicotinate as the starting material and referring to the synthesis of intermediate Im-4, the product methyl 2-(chloromethyl)-1-((1-(fluoromethyl)cyclopropyl)methyl)-1H-imidazolo[4,5-b]pyridine-6-carboxylate was obtained.
MS m/z (ESI): 312.1 [M+1].
1-(3-Bromo-2-hydroxyphenyl)ethan-1-one Im-7a (20 g, 0.09 mol), tert-butyl 4-(4,4,5,5-tetramethyl-1,3,2-dioxaborolan-2-yl)-3,6-dihydropyridine-1(2H)-carboxylate (32 g, 0.10 mol), Pd(dppf)Cl2·CH2Cl2 (7.6 g, 9.40 mmol), and anhydrous potassium carbonate (39 g, 0.28 mol) were dissolved in a mixed solvent of 250 mL of dioxane and water (4:1). The reaction was heated to 100° C. and stirred for 8 hours. The reaction was stopped, the reaction solution was cooled to ambient temperature, filtered through diatomaceous earth. The filtrate was concentrated under reduced pressure, and the residue was purified by silica gel column chromatography with petroleum ether and ethyl acetate as eluent system to obtain the title product tert-butyl 4-(3-acetyl-2-hydroxyphenyl)-3,6-dihydropyridine-1(2H)-carboxylate Im-7b (26 g, colorless oil) with a yield of 88.1%.
MS m/z (ESI): 318.1 [M+1].
Tert-butyl 4-(3-acetyl-2-hydroxyphenyl)-3,6-dihydropyridine-1(2H)carboxylate Im-7b (26 g, 0.08 mol) and Pd/C (2.6 g, 10% wt.) were dispersed in methanol (300 mL), and the reaction system was purged with hydrogen gas three times to discharge air. The reaction solution was stirred for 12 hours. The reaction was stopped, and the reaction solution was filtered through diatomaceous earth. The filtrate was concentrated under reduced pressure, and the residue was purified by silica gel column chromatography with petroleum ether and ethyl acetate as eluent system to obtain the title product, tert-butyl 4-(3-acetyl-2-hydroxyphenyl)piperidine-1-carboxylate Im-7 (25 g, white solid) with a yield of 95.6%.
MS m/z (ESI): 320.1 [M+1].
Sodium tetraborate decahydrate (45.97 g, 66.50 mmol) was added to a solution of 1-(3-bromo-2-hydroxyphenyl)ethan-1-one (13 g, 60.45 mmol) and 4-chloro-2-fluorobenzaldehyde (10.06 g, 63.48 mmol) in ethanol (125 mL) and water (200 mL), and stirred at 90° C. for 12 hours. The reaction solution was cooled, and filtered. The filter cake was washed with water, and dried to obtain the title product (E)-1-(3-bromo-2-hydroxyphenyl)-3-(4-chloro-2-fluorophenyl)prop-2-en-1-one (20 g, yellow solid) with a yield of 93.0%.
MS m/z (ESI): 354.9 [M+1]
A solution of (E)-1-(3-bromo-2-hydroxyphenyl)-3-(4-chloro-2-fluorophenyl)prop-2-en-1-one (2 g, 5.62 mmol) and concentrated hydrochloric acid (4 mL) in ethanol (10 mL) was stirred under microwave at 110° C. for 20 hours, cooled, and concentrated to dryness by rotary evaporation. The resulting residue was purified by silica gel column chromatography with petroleum ether and ethyl acetate as eluent system to obtain the title product 8-bromo-2-(4-chloro-2-fluorophenyl)chroman-4-one (1.8 g, yellow solid), with a yield of 90.0%.
MS m/z (ESI): 355.0 [M+1]
Bis 2-Methoxy-N-(2-methoxyethyl)-N-(trifluoro-sulfoalkyl) ethylamine (10 mL) was added dropwise into a solution of 8-bromo-2-(4-chloro-2-fluorophenyl)chroman-4-one (1.8 g, 5.06 mmol) in tetrahydrofuran (10 mL), then stirred at 70° C. for 12 hours, and cooled. Water was added to quench the reaction, and the reaction solution was extracted with dichloromethane (50 mL×3). The organic phase was washed with saturated sodium bicarbonate solution (50 mL×2) and saturated sodium chloride solution (50 mL×2), dried over anhydrous sodium sulfate, filtered, and concentrated to dryness by rotary evaporation. The resulting residue was purified by silica gel column chromatography with petroleum ether and ethyl acetate as eluent system to obtain the title product 8-bromo-2-(4-chloro-2-fluorophenyl)-4,4-difluorochromane (400 mg, yellow solid) with a yield of 20.9%.
MS m/z (ESI): 377.0 [M+1]
A mixture of 8-bromo-2-(4-chloro-2-fluorophenyl)-4,4-difluorochromane (400 mg, 1.06 mmol), tert-butyl 4-(4,4,5,5-tetramethyl-1,3,2-dioxaborolan-2-yl)-3,6-dihydropyridine-1(2H)-carboxylate (360.32 mg, 1.17 mmol), sodium carbonate (280.71 mg, 2.65 mmol), [1,1′-Bis(diphenylphosphino)ferrocene]palladium chloride (77.44 mg, 105.94 μmol), 1,4-dioxane (10 mL), and water (2 mL) was stirred at 100° C. under a nitrogen atmosphere for 2 hours, cooled, and water was added. The reaction solution was extracted with dichloromethane (10 mL×2), and the organic phase was washed with saturated sodium chloride solution (20 mL×2), dried over anhydrous sodium sulfate, filtered, and concentrated to dryness by rotary evaporation. The resulting residue was purified by silica gel column chromatography with petroleum ether and ethyl acetate as eluent system to obtain the title product tert-butyl 4-[2-(4-chloro-2-fluorophenyl)-4,4-difluorochroman-8-yl]-3,6-dihydropyridine-1(2H)-carboxylate (450 mg, yellow oil) with a yield of 88.5%.
MS m/z (ESI): 480.1 [M+1]
A mixture of tert-butyl 4-[2-(4-chloro-2-fluorophenyl)-4,4-difluorochroman-8-yl]-3,6-dihydropyridine-1(2H)-carboxylate (450 mg, 937.66 μmol), palladium on carbon (80 mg, 10%), and ethyl acetate (30 mL) was purged with hydrogen gas three times and stirred for 5 hours. The reaction solution was filtered and concentrated to dryness by rotary evaporation to obtain the title product tert-butyl 4-[2-(4-chloro-2-fluorophenyl)-4,4-difluorochroman-8-yl]piperidine-1-carboxylate (380 mg, light yellow oil) with a yield of 84.1%.
MS m/z (ESI): 482.2 [M+1]
A mixture of tert-butyl 4-[2-(4-chloro-2-fluorophenyl)-4,4-difluorochroman-8-yl]piperidine-1-carboxylate (340 mg, 705.49 μmol), and hexafluoroisopropanol (10 mL) was stirred at 80° C. under microwave for 4 hours, cooled, and the filtrate was concentrated under reduced pressure. The resulting residue was purified by silica gel column chromatography with petroleum ether and ethyl acetate as eluent system to obtain the title product 4-[2-(4-chloro-2-fluorophenyl)-4-fluoro-2H-chromen-8-yl]piperidine (40 mg, colorless oil) with a yield of 15.7%.
MS m/z (ESI): 362.1 [M+1]
A mixture of 4-[2-(4-chloro-2-fluorophenyl)-4-fluoro-2H-chromen-8-yl]piperidine (40 mg, 110.55 μmol), Im-1 (46.68 mg, 143.72 μmol), potassium carbonate (61.03 mg, 442.22 μmol) and acetonitrile (5 mL) was stirred at 50° C. for 3 hours, cooled, and 5 mL of water was added. The reaction solution was extracted with dichloromethane (20 mL×3), and the organic phase was washed with saturated sodium chloride solution (20 mL×2), dried over anhydrous sodium sulfate, filtered, and the filtrate was concentrated under reduced pressure. The resulting residue was purified by silica gel column chromatography with petroleum ether and ethyl acetate as eluent system to obtain the title product methyl 2-[4-[2-(4-chloro-2-fluorophenyl)-4-fluoro-2H-chromen-8-yl]piperidin-1-yl]methyl]-3-[[1-(fluoromethyl)cyclopropyl]methyl]benzimidazole-5-carboxylate (30 mg, colorless oil) with a yield of 43.7%.
MS m/z (ESI): 620.2 [M+1]
A mixture of methyl 2-[4-[2-(4-chloro-2-fluorophenyl)-4-fluoro-2H-chromen-8-yl]piperidin-1-yl]methyl]-3-[[1-(fluoromethyl)cyclopropyl]methyl]benzimidazol-5-carboxylate (30 mg, 48.38 μmol, lithium hydroxide monohydrate (20 mg, 476.62 μmol), methanol (2 mL), water (2 mL), and tetrahydrofuran (3 mL) was stirred at room temperature for 12 hours, adjusted to pH=6 with formic acid, and concentrated to dryness by rotary evaporation. The resulting residue was purified by silica gel column chromatography with petroleum ether and ethyl acetate as eluent system to obtain 2-((4-(2-(4-chloro-2-fluorophenyl)-4-fluoro-2H-chromen-8-yl)piperidin-1-yl)methyl)-1-(((S)-oxetan-2-yl)methyl)-1H-benzo[d]imidazole-6-carboxylic acid (20 mg, white solid) with a yield of 68.2%.
MS m/z (ESI): 606.2 [M+1].
MS m/z (ESI): 606.2 [M+1].
MS m/z (ESI): 606.2 [M+1].
Replacing Im-1 with Im-2, and referring to Example 1, 2-((4-(2-(4-chloro-2-fluorophenyl)-4-fluoro-2H-chromen-8-yl)piperidin-1-yl)methyl)-3-(((S)-oxetan-2-yl)methyl)-3H-imidazolo[4,5-b]pyridine-5-carboxylic acid was obtained.
MS m/z (ESI): 607.2 [M+1].
MS m/z (ESI): 607.2 [M+1].
MS m/z (ESI): 607.2 [M+1].
Replacing Im-1 with Im-4 and referring to Example 1, 2-((4-(2-(4-chloro-2-fluorophenyl)-4-fluoro-2H-chromen-8-yl)piperidin-1-yl)methyl)-1-((1-(fluoromethyl)cyclopropyl)methyl)-1H-benzo[d]imidazole-6-carboxylic acid was obtained.
MS m/z (ESI): 622.2 [M+1].
MS m/z (ESI): 622.2 [M+1].
MS m/z (ESI): 622.2 [M+1].
Replacing Im-1 with Im-5 and referring to Example 1, 2-((4-(2-(4-chloro-2-fluorophenyl)-4-fluoro-2H-chromen-8-yl)piperidin-1-yl)methyl)-3-((1-(fluoromethyl)cyclopropyl)methyl)-3H-imidazolo[4,5-b]pyridine-5-carboxylic acid was obtained.
MS m/z (ESI): 623.2 [M+1].
MS m/z (ESI): 623.2 [M+1].
MS m/z (ESI): 623.2 [M+1].
Using 2,4-dichlorobenzaldehyde as the starting material, and referring to Step 1 of Example 1, (E)-1-(3-bromo-2-hydroxyphenyl)-3-(2,4-dichlorophenyl)prop-2-en-1-one was obtained.
MS m/z (ESI): 371.0 [M+1]
Using (E)-1-(3-bromo-2-hydroxyphenyl)-3-(2,4-dichlorophenyl)prop-2-en-1-one as the starting material, and referring to Step 2 to Step 6 of Example 1, 4-(2-(2,4-dichlorophenyl)-4-fluoro-2H-chromen-8-yl)piperidine was obtained.
MS m/z (ESI): 378.1 [M+1]
Using 4-(2,4-dichlorophenyl)-4-fluoro-2H-chromen-8-yl)piperidine and Im-5 as the starting materials, and referring to Step 7 to Step 8 of Example 1, 2-((4-(2,4-dichlorophenyl)-4-fluoro-2H-chromen-8-yl)piperidine-1-yl)methyl)-3-(1-(fluoromethyl)cyclopropyl)methyl)-3H-imidazolo[4,5-b]pyridine-5-carboxylic acid was obtained.
MS m/z (ESI): 639.2 [M+1].
MS m/z (ESI): 639.2 [M+1].
MS m/z (ESI): 639.2 [M+1].
Replacing Im-1 with Im-6 and referring to Example 1, 2-(4-(2-(4-chloro-2-fluorophenyl)-4-fluoro-2H-chromen-8-yl)piperidin-1-yl)methyl)-1-(1-(fluoromethyl)cyclopropyl)methyl)-1H-imidazolo[4,5-b]pyridine-6-carboxylic acid was obtained.
MS m/z (ESI): 623.2 [M+1].
MS m/z (ESI): 623.2 [M+1].
MS m/z (ESI): 623.2 [M+1].
Using 3-fluoro-4-formylbenzonitrile as the starting material, and referring to Step 1 of Example 1, (E)-4-(3-(3-bromo-2-hydroxyphenyl)-3-oxoprop-1-en-1-yl)-3-fluorobenzonitrile was obtained.
MS m/z (ESI): 346.0 [M+1]
Using (E)-1-(3-bromo-2-hydroxyphenyl)-3-(2,4-dichlorophenyl)prop-2-en-1-one as the starting material, and referring to Step 2 to Step 6 of Example 1, 3-fluoro-4-(4-fluoro-8-(piperidin-4-yl)-2H-chromen-2-yl)benzonitrile was obtained.
MS m/z (ESI): 353.1 [M+1].
Using 3-fluoro-4-(4-fluoro-8-(piperidin-4-yl)-2H-chromen-2-yl)benzonitrile and Im-4 as the starting materials, and referring to steps Step 7 to Step 8 of Example 1, 2-((4-(2-(4-cyano-2-fluorophenyl)-4-fluoro-2H-chromen-8-yl)piperidin-1-yl)methyl)-1-((1-(fluoromethyl)cyclopropyl)methyl)-1H-benzo[d]imidazole-6-carboxylic acid was obtained.
MS m/z (ESI): 613.2 [M+1].
MS m/z (ESI): 613.2 [M+1].
MS m/z (ESI): 613.2 [M+1].
Using 3-fluoro-4-(4-fluoro-8-(piperidin-4-yl)-2H-chromen-2-yl)benzonitrile and Im-1 as the starting materials, and referring to Example 1, 2-((4-(2-(4-cyano-2-fluorophenyl)-4-fluoro-2H-chromen-8-yl)piperidin-1-yl)methyl)-1-(((S)-oxetan-2-yl)methyl)-1H-benzo[d]imidazole-6-carboxylic acid was obtained.
MS m/z (ESI): 597.2 [M+1].
MS m/z (ESI): 597.2 [M+1].
MS m/z (ESI): 597.2 [M+1].
Using 4-(2,4-dichlorophenyl)-4-fluoro-2H-chromen-8-yl)piperidine and Im-6 as the starting materials, and referring to Example 1, 2-((4-(2-(2,4-dichlorophenyl)-4-fluoro-2H-chromen-8-yl)piperidin-1-yl)methyl)-1-((1-(fluoromethyl)cyclopropyl)methyl)-1H-imidazolo[4,5-b]pyridine-6-carboxylic acid was obtained.
MS m/z (ESI): 639.2 [M+1].
MS m/z (ESI): 639.2 [M+1].
MS m/z (ESI): 639.2 [M+1].
Using (E)-1-(3-bromo-2-hydroxyphenyl)-3-(4-chloro-2-fluorophenyl)prop-2-en-1-one as the starting material, and referring to Step 4 and Step 5 of Example 1, tert-butyl (E)-4-(3-(4-chloro-2-fluorophenyl)acryloyl)-2-hydroxyphenyl)piperidine-1-carboxylate was obtained.
MS m/z (ESI): 460.2 [M+1].
Sodium borohydride (248 mg, 6.54 mmol) was added to a solution of tert-butyl (E)-4-(3-(3-(4-chloro-2-fluorophenyl)acryloyl)-2-hydroxyphenyl)piperidine-1-carboxylate (1 g, 2.18 mmol) in isopropanol (25 mL) at 50° C., then stirred at room temperature for 16 hours. 10 mL of water was added to quench the reaction, and the reaction solution was extracted with dichloromethane (50 mL×3). The organic phase was washed with saturated sodium chloride solution (20 mL×3), dried over anhydrous sodium sulfate, and filtered. The filtrate was concentrated under reduced pressure. The resulting residue was purified by silica gel column chromatography with petroleum ether and ethyl acetate as eluent system to obtain tert-butyl 4-(2-(4-chloro-2-fluorophenyl)-2H-chromen-8-yl)piperidine-1-carboxylate (260 mg, light yellow oil) with a yield of 26.9%.
MS m/z (ESI): 444.2 [M+1].
Using tert-butyl 4-(2-(4-chloro-2-fluorophenyl)-2H-chromen-8-yl)piperidine-1-carboxylate and Im-5 as the starting materials, and referring to Step 6 to Step 8 of Example 1, 2-((4-(2-(4-chloro-2-fluorophenyl)-2H-chromen-8-yl)piperidin-1-yl)methyl)-3-(1-(fluoromethyl)cyclopropyl)methyl)-3H-imidazolo[4,5-b]pyridine-5-carboxylic acid was obtained.
MS m/z (ESI): 605.2 [M+1].
MS m/z (ESI): 605.2 [M+1].
MS m/z (ESI): 605.2 [M+1].
Using 4-[2-(4-chloro-2-fluorophenyl)-4-fluoro-2H-chromen-8-yl]piperidine and Im-3 as the starting materials, and referring to Example 1, 2-((4-(2-(4-chloro-2-fluorophenyl)-4-fluoro-2H-chromen-8-yl)piperidin-1-yl)methyl)-1-(((S)-oxetan-2-yl)methyl)-1H-imidazolo[4,5-b]pyridine-6-carboxylic acid was obtained.
MS m/z (ESI): 607.2 [M+1].
MS m/z (ESI): 607.2 [M+1].
MS m/z (ESI): 607.2 [M+1].
Using 4-(2,4-dichlorophenyl)-4-fluoro-2H-chromen-8-yl)piperidine and Im-4 as the starting materials, and referring to Example 1, 2-((4-(2-(2,4-dichlorophenyl)-4-fluoro-2H-chromen-8-yl)piperidin-1-yl)methyl)-1-((1-(fluoromethyl)cyclopropyl)methyl)-1H-benzo[d]imidazole-6-carboxylic acid was obtained.
MS m/z (ESI): 638.2 [M+1].
MS m/z (ESI): 638.2 [M+1].
MS m/z (ESI): 638.2 [M+1].
Using 4-(2,4-dichlorophenyl)-4-fluoro-2H-chromen-8-yl)piperidine and Im-2 as the starting materials, and referring to Example 1, 2-((4-(2-(2,4-dichlorophenyl)-4-fluoro-2H-chromen-8-yl)piperidin-1-yl)methyl)-3-(((S)-oxetan-2-yl)methyl)-3H-imidazolo[4,5-b]pyridine-5-carboxylic acid was obtained.
MS m/z (ESI): 623.2 [M+1].
MS m/z (ESI): 623.2 [M+1].
MS m/z (ESI): 623.2 [M+1].
Using 4-(2,4-dichlorophenyl)-4-fluoro-2H-chromen-8-yl)piperidine and Im-1 as the starting materials, and referring to Example 1, 2-((4-(2-(2,4-dichlorophenyl)-4-fluoro-2H-chromen-8-yl)piperidin-1-yl)methyl)-1-(((S)-oxetan-2-yl)methyl)-1H-benzo[d]imidazole-6-carboxylic acid was obtained.
MS m/z (ESI): 622.2 [M+1].
MS m/z (ESI): 622.2 [M+1].
MS m/z (ESI): 622.2 [M+1].
Using 4-(2,4-dichlorophenyl)-4-fluoro-2H-chromen-8-yl)piperidine and Im-3 as the starting materials, and referring to Example 1, 2-((4-(2-(2,4-dichlorophenyl)-4-fluoro-2H-chromen-8-yl)piperidin-1-yl)methyl)-1-(((S)-oxetan-2-yl)methyl)-1H-imidazolo[4,5-b]pyridine-6-carboxylic acid was obtained.
MS m/z (ESI): 623.2 [M+1].
MS m/z (ESI): 623.2 [M+1].
MS m/z (ESI): 623.2 [M+1].
Using 8-bromo-2-(4-chloro-2-fluorophenyl)chroman-4-one as the starting material, and referring to the Step 4 and Step 5 of Example 1 the product tert-butyl 4-(2-(4-chloro-2-fluorophenyl)-4-oxochroman-8-yl)piperidine-1-carboxylate was obtained.
MS m/z (ESI): 460.1 [M+1]
Tert-butyl 4-(2-(4-chloro-2-fluorophenyl)-4-oxochroman-8-yl)piperidine-1-carboxylate (1 g, 2.17 mmol) was dissolved in 20 mL of THF, lithium bis(trimethylsilyl)amide (2.4 mL, 2.40 mmol) was added at −78° C., and reacted for 1 hour. A solution of 2-[N,N-bis(trifluoromethylsulphonyl)amino]-5-chloropyridine (0.94 g, 2.4 mmol) in THE (20 mL) was added at −78° C. The reaction solution was slowly raised to room temperature and stirred for 5 hours. Sodium bicarbonate (10 mL) was added to quench the reaction. The reaction solution was extracted with ethyl acetate (20 mL×3). The combined organic phases were washed with saturated sodium chloride solution (20 mL×2), dried over anhydrous sodium sulfate and concentrated under reduced pressure to obtain the crude product. The resulting residue was purified by silica gel column chromatography with petroleum ether and ethyl acetate as eluent system to obtain tert-butyl 4-(2-(4-chloro-2-fluorophenyl)-4-(((trifluoromethyl)sulfonyl)oxy)-2H-chromen-8-yl)piperidine-1-carboxylate (456 mg, yield: 35.5%).
MS m/z (ESI): 592.1[M+1].
Tert-butyl 4-(2-(4-chloro-2-fluorophenyl)-4-(((trifluoromethyl)sulfonyl)oxy)-2H-chromen-8-yl)piperidine-1-carboxylate (0.5 g, 0.84 mmol) was dissolved in 10 mL of DMA/THF (v:v=1:3), nickel acetate tetrahydrate (24.8 mg, 0.1 mmol), Zn powder (10 mg, 0.16 mmol), 1,5-cyclooctadiene (11 mg, 0.1 mmol), and lithium chloride (53 mg, 1.3 mmol) were added, and reacted at room temperature under a nitrogen atmosphere for 16 hours. 10 mL of water was added to quench the reaction, and the reaction solution was extracted with ethyl acetate (20 mL×3). The combined organic phases were washed with saturated sodium chloride solution (20 mL×2), dried over anhydrous sodium sulfate and concentrated under reduced pressure to obtain the crude product. The resulting residue was purified by silica gel column chromatography with petroleum ether and ethyl acetate as eluent system to obtain tert-butyl 4-(4-chloro-2-(4-chloro-2-fluorophenyl)-2H-chromen-8-yl)piperidine-1-carboxylate (241 mg, yield: 60.0%).
MS m/z (ESI): 478.1[M+1].
Using tert-butyl 4-(4-chloro-2-(4-chloro-2-fluorophenyl)-2H-chromen-8-yl)piperidine-1-carboxylate and Im-1 as the starting materials, and referring to Step 6 to Step 8 of Example 1, the product 2-(4-(4-chloro-2-(4-chloro-2-fluorophenyl)-2H-chromen-8-yl)piperidin-1-yl)methyl)-1-(((S)-oxetan-2-yl)methyl)-1H-benzo[d]imidazole-6-carboxylic acid was obtained.
MS m/z (ESI): 622.1[M+1].
MS m/z (ESI): 622.1[M+1].
MS m/z (ESI): 622.1[M+1].
Using tert-butyl 4-(4-chloro-2-(4-chloro-2-fluorophenyl)-2H-chromen-8-yl)piperidine-1-carboxylate and Im-2 as the starting materials, and referring to Step 6 to Step 8 of Example 1, the product 2-(4-(4-chloro-2-(4-chloro-2-fluorophenyl)-2H-chromen-8-yl)piperidin-1-yl)methyl)-3-(((S)-oxetan-2-yl)methyl)-3H-imidazolo[4,5-b]pyridine-5-carboxylic acid was obtained.
MS m/z (ESI): 623.1[M+1].
MS m/z (ESI): 623.1[M+1].
MS m/z (ESI): 623.1[M+1].
(E)-1-(3-Bromo-2-hydroxyphenyl)-3-(4-chloro-2-fluorophenyl)prop-2-en-1-one (1 g, 2.81 mmol) was dissolved in 30 mL of THF, and methylmagnesium bromide (7 mL, 7 mmol) was added at 0° C. The reaction solution was slowly raised to room temperature and stirred for 3 hours. Ammonium chloride (10 mL) was added to quench the reaction, the reaction solution was extracted with ethyl acetate (20 mL×3). The combined organic phases were washed with saturated sodium chloride solution (20 mL×2), dried over anhydrous sodium sulfate and concentrated under reduced pressure to obtain the crude product. The resulting residue was purified by silica gel column chromatography with petroleum ether and ethyl acetate as eluent system to obtain (E)-2-bromo-6-(4-(4-chloro-2-fluorophenyl)-2-hydroxybut-3-en-2-yl)phenol (831 mg, yield: 79.6%).
MS m/z (ESI): 370.9 [M+1].
(E)-2-Bromo-6-(4-(4-chloro-2-fluorophenyl)-2-hydroxybut-3-en-2-yl)phenol (0.5 g, 1.34 mmol) was dissolved in 15 mL of nitromethane, (2,3,4,5-tetrafluorophenyl)boric acid (52 mg, 0.26 mmol) was added, and stirred at 60° C. for 16 hours. 10 mL of water was added to quench the reaction, and the reaction solution was extracted with ethyl acetate (20 mL×3), washed with saturated sodium chloride solution (20 mL×2), dried over anhydrous sodium sulfate and concentrated under reduced pressure to obtain the crude product. The resulting residue was purified by silica gel column chromatography with petroleum ether and ethyl acetate as eluent system to obtain 8-bromo-2-(4-chloro-2-fluorophenyl)-4-fluoro-2H-chromene (326 mg, yield: 68.0%).
MS m/z (ESI): 356.9 [M+1].
Using 8-bromo-2-(4-chloro-2-fluorophenyl)-4-fluoro-2H-chromene as the starting material, and referring to Step 4, Step 5, Step 7, and Step 8 of Example 1, the product 2-((4-(2-(4-chloro-2-fluorophenyl)-4-methyl-2H-chromen-8-yl)piperidin-1-yl)methyl)-1-(((S)-oxetan-2-yl)methyl)-1H-benzo[d]imidazole-6-carboxylic acid was obtained.
MS m/z (ESI): 602.2 [M+1].
MS m/z (ESI): 602.2 [M+1].
MS m/z (ESI): 602.2 [M+1].
Using 4-chloro-2-methoxybenzaldehyde as the starting material and referring to Example 3, the product 2-((4-(2-(4-chloro-2-methoxyphenyl)-4-fluoro-2H-chromen-8-yl)piperidin-1-yl)methyl)-1-(1-(fluoromethyl)cyclopropyl)methyl)-1H-benzo[d]imidazole-6-carboxylic acid was obtained.
MS m/z (ESI): 634.2 [M+1].
MS m/z (ESI): 634.2 [M+1].
MS m/z (ESI): 634.2 [M+1].
Using 4-chloro-2-methoxybenzaldehyde as the starting material and referring to Example 4, the product 2-((4-(2-(4-chloro-2-methoxyphenyl)-4-fluoro-2H-chromen-8-yl)piperidin-1-yl)methyl)-3-(1-(fluoromethyl)cyclopropyl)methyl)-3H-imidazolo[4,5-b]pyridine-5-carboxylic acid was obtained.
MS m/z (ESI): 635.2 [M+1].
MS m/z (ESI): 635.2 [M+1].
MS m/z (ESI): 635.2 [M+1].
Using 4-chloro-2-methoxybenzaldehyde as the starting material and referring to Example 6, the product 2-((4-(2-(4-chloro-2-methoxyphenyl)-4-fluoro-2H-chromen-8-yl)piperidin-1-yl)methyl)-1-((1-(fluoromethyl)cyclopropyl)methyl)-1H-imidazolo[4,5-b]pyridine-6-carboxylic acid was obtained.
MS m/z (ESI): 635.2 [M+1].
MS m/z (ESI): 635.2 [M+1].
MS m/z (ESI): 635.2 [M+1].
Using 3-fluoro-4-(4-fluoro-8-(piperidin-4-yl)-2H-chromen-2-yl)benzonitrile and Im-2 as the starting materials, and referring to Step 7 to Step 8 of Example 1, the product 2-((4-(2-(4-cyano-2-fluorophenyl)-4-fluoro-2H-chromen-8-yl)piperidin-1-yl)methyl)-3—(((S)-oxetan-2-yl)methyl)-3H-imidazolo[4,5-b]pyridine-5-carboxylic acid was obtained.
MS m/z (ESI): 598.2[M+1].
MS m/z (ESI): 598.2 [M+1].
MS m/z (ESI): 598.2 [M+1].
Using 4-chloro-2-(methoxy-d3)benzaldehyde as the starting material and referring to Example 2, the product 2-((4-(2-(4-chloro-2-(methoxy-d3)phenyl)-4-fluoro-2H-chromen-8-yl)piperidin-1-yl)methyl)-3-(((S)-oxetan-2-yl)methyl)-3H-imidazolo[4,5-b]pyridine-5-carboxylic acid was obtained.
MS m/z (ESI): 622.2 [M+1].
MS m/z (ESI): 622.2 [M+1].
MS m/z (ESI): 622.2 [M+1].
Using 4-chloro-2-(methoxy-d3)benzaldehyde as the starting material and referring to Example 1, the product 2-((4-(2-(4-chloro-2-(methoxy-d3)phenyl)-4-fluoro-2H-chromen-8-yl)piperidin-1-yl)methyl)-1-(((S)-oxetan-2-yl)methyl)-1H-benzo[d]imidazole-6-carboxylic acid was obtained.
MS m/z (ESI): 621.2[M+1].
MS m/z (ESI): 621.2 [M+1].
MS m/z (ESI): 621.2 [M+1].
To a mixture solution of 8-bromo-2-(4-chloro-2-fluorophenyl)-4,4-difluorochromane (1 g, 2.65 mmol), tert-butyl piperazine-1-carboxylate (740 mg, 3.97 mmol), cesium carbonate (2.59 g, 7.95 mmol), and toluene (30 mL) was added tris(dibenzylideneacetone)dipalladium (238 mg, 0.26 mmol) and 4,5-bis(diphenylphosphino)-9,9-dimethylxanthene (300 mg, 0.52 mmol). The reaction system was purged with nitrogen gas, and then stirred at 80° C. for 12 hours. After the reaction was completed, the reaction solution was cooled and filtered. The filtrate was concentrated to dryness under reduced pressure. The resulting residue was purified by silica gel column chromatography with petroleum ether and ethyl acetate as eluent system to obtain tert-butyl 4-(2-(4-chloro-2-fluorophenyl)-4,4-difluorochroman-8-yl)piperazine-1-carboxylate (750 mg) with a yield of 58.6%.
MS m/z (ESI): 483.1 [M+1].
Using tert-butyl 4-(2-(4-chloro-2-fluorophenyl)-4,4-difluorochroman-8-yl)piperazine-1-carboxylate as the starting material, and referring to Step 6 to Step 8 of Example, the product 2-((4-(2-(4-chloro-2-fluorophenyl)-4-fluoro-2H-chromen-8-yl)piperazine-1-yl)methyl)-1-(((S)-oxetan-2-yl)methyl)-1H-benzo[d]imidazole-6-carboxylic acid was obtained.
MS m/z (ESI): 607.1[M+1].
MS m/z (ESI): 607.1 [M+1].
MS m/z (ESI): 607.1 [M+1].
2-Chloro-1-(4-chloro-2-fluorophenyl)ethan-1-one (1 g, 4.83 mmol) and 2-amino-6-bromophenol (908 mg, 4.83 mmol) were dissolved in THE (30 mL). The reaction system was purged with nitrogen gas, and then stirred under microwave at 60° C. for 2 hours. After the reaction was completed, the reaction solution was cooled and filtered. The filtrate was concentrated to dryness under reduced pressure. The resulting residue was purified by silica gel column chromatography with petroleum ether and ethyl acetate as eluent system to obtain 8-bromo-2-(4-chloro-2-fluorophenyl)-2H-benzo[b][1,4]oxazine (810 mg) with a yield of 49.2%.
MS m/z (ESI): 340.1 [M+1].
Using 8-bromo-2-(4-chloro-2-fluorophenyl)-2H-benzo[b][1,4]oxazine as the starting material, and referring to Step 4 to Step 8 of Example 1, the product 2-((4-(2-(4-chloro-2-fluorophenyl)-2H-benzo[b][1,4]oxazin-8-yl)piperidin-1-yl)methyl)-1-(((S)-oxetan-2-yl)methyl)-1H-benzo[d]imidazole-6-carboxylic acid was obtained.
MS m/z (ESI): 589.2[M+1].
MS m/z (ESI): 589.2 [M+1].
MS m/z (ESI): 589.2 [M+1].
Using 8-bromo-2-(4-chloro-2-fluorophenyl)-4,4-difluorochromane and tert-butyl (S)-2-methylpiperazine-1-carboxylate as the starting materials, and referring to Example 25, the product 2-(((2S)-4-(2-(4-chloro-2-fluorophenyl)-4-fluoro-2H-chromen-8-)-2-methylpiperazine-1-yl)methyl)-1-(((S)-oxetan-2-yl)methyl)-1H-benzo[d]imidazole-6-carboxylic acid was obtained.
MS m/z (ESI): 621.2 [M+1]
MS m/z (ESI): 621.2 [M+1].
MS m/z (ESI): 621.2 [M+1].
Using 3-fluoro-4-(4-fluoro-8-(piperidin-4-yl)-2H-chromen-2-yl)benzonitrile and Im-5 as the starting materials, and referring to Step 7 to Step 8 of Example 1, 2-((4-(2-(4-cyano-2-fluorophenyl)-4-fluoro-2H-chromen-8-yl)piperidin-1-yl)methyl)-3-((1-(fluoromethyl)cyclopropyl)methyl)-3H-imidazolo[4,5-b]pyridine-5-carboxylic acid was obtained.
MS m/z (ESI): 614.2 [M+1].
MS m/z (ESI): 614.2 [M+1].
MS m/z (ESI): 614.2 [M+1].
4-Chloro-2-fluorobenzaldehyde (4 g, 25.23 mmol) and nitromethane (14 mL) were dissolved in glacial acetic acid (50 mL), ammonium acetate (5.83 g, 75.68 mmol) was added, stirred at 110° C. for 3 hours, and cooled. The reaction solution was added to ice water to precipitate a solid, and filtered. The filter cake was purified by silica gel column chromatography with petroleum ether and ethyl acetate as eluent system to obtain (E)-4-chloro-2-fluoro-1-(2-nitrovinyl)benzene (2.50 g, yield: 49.2%).
MS m/z (ESI): 202.0 [M+1].
3-Ethyl-5-(2-hydroxyethyl)-4-methylthiazolium bromide (37.63 mg, 149.24 mmol) was added to a solution of (E)-4-chloro-2-fluoro-1-(2-nitrovinyl)benzene (451.26 mg, 2.24 mmol), 2-bromo-6-hydroxybenzaldehyde (300 mg, 1.49 mmol), and 4 A molecular sieve (400 mg mol) in dichloromethane (10 mL), then stirred at room temperature for 0.5 hours, and then 1,4-diazobicyclo[2.2.2]octane (33.48 mg, 298.48 mol) was added dropwise. The reaction solution was stirred at room temperature for 12 hours under a nitrogen atmosphere, mixed with silica gel and concentrated to dryness under reduced pressure. The resulting residue was purified by silica gel column chromatography with petroleum ether and ethyl acetate as eluent system to obtain 5-bromo-3-(4-chloro-2-fluorophenyl) chromen-4-one (90 mg, yield: 16.9%)
MS m/z (ESI): 355.0 [M+1].
Using 5-bromo-3-(4-chloro-2-fluorophenyl)chroman-4-one as the starting material, and referring to Step 3 to Step 8 of Example 1, the product 2-((4-(3-(4-chloro-2-fluorophenyl)-4,4-difluorochroman-5-yl)piperidin-1-yl)methyl)-3-(((S)-oxetan-2-yl)methyl)-3H-imidazolo[4,5-b]pyridine-5-carboxylic acid was obtained.
MS m/z (ESI): 627.2[M+1].
MS m/z (ESI): 627.2[M+1].
MS m/z (ESI): 627.2[M+1].
Triethylsilane (655 mg, 0.9 mL, 5.65 mmol) was added dropwise to a solution of 5-bromo-3-(4-chloro-2-fluorophenyl)chroman-4-one (500 mg, 1.41 mmol) in trifluoroacetic acid (5 mL), then stirred at 60° C. for 8 hours, and cooled. Water was added to quench the reaction, and the reaction solution was extracted with dichloromethane (30 mL×3). The organic phase was washed with saturated sodium bicarbonate solution (50 mL×2) and saturated sodium chloride solution (50 mL×2), dried over anhydrous sodium sulfate, filtered, and the filtrate was concentrated under reduced pressure. The resulting residue was purified by silica gel column chromatography with petroleum ether and ethyl acetate as eluent system to obtain a light yellow solid 5-bromo-3-(4-chloro-2-fluorophenyl)chromane (230 mg, yield: 47.8%).
MS m/z (ESI): 340.9[M+1].
Using 5-bromo-3-(4-chloro-2-fluorophenyl)chromane as the starting material, and referring to Step 4 to Step 8 of Example 1, 2-((4-(3-(4-chloro-2-fluorophenyl)chroman-5-yl)piperidin-1-yl)methyl)-3-(((S)-oxetan-2-yl)methyl)-3H-imidazolo[4,5-b]pyridine-5-carboxylic acid was obtain.
MS m/z (ESI): 591.2[M+1].
MS m/z (ESI): 591.2[M+1].
MS m/z (ESI): 591.2[M+1].
3-Bromo-2-nitrophenol (2 g, 9.17 mmol), tert-butyl 4-(4,4,5,5-tetramethyl-1,3,2-dioxaborolan-2-yl)-3,6-dihydro-2H-pyridin-1-carboxylate (2.84 g, 9.17 mmol), sodium carbonate (1.94 g, 18.34 mmol), and [1,1′-Bis(diphenylphosphino)ferrocene]palladium chloride (335.48 mg, 458.5 μmol) were dissolved in 1,4-dioxane (20 mL) and water (3 mL), and the reaction was stirred at 80° C. for 6 hours. 20 mL of water was added, and the reaction solution was extracted with ethyl acetate (15 mL×3). The combined organic phases were washed with saturated sodium bicarbonate solution (5 mL×2), saturated ammonium chloride solution (5 mL×2) and saturated brine (5 mL×2) successively, dried over anhydrous sodium sulfate, filtered, and the filtrate was concentrated under reduced pressure. The resulting residue was purified by silica gel column chromatography with petroleum ether and ethyl acetate as eluent system to obtain the title product tert-butyl 4-(3-hydroxy-2-nitrophenyl)-3,6-dihydropyridine-1(2H)-carboxylate (2.3 g, yellow solid) with a yield of 78.3%.
MS m/z (ESI): 321.1 [M+1]
Tert-butyl 4-(3-hydroxy-2-nitrophenyl)-3,6-dihydropyridine-1(2H)-carboxylate (2.30 g, 7.18 mmol), 2-chloro-1-(4-chloro-2-fluorophenyl)ethan-1-one (1.49 g, 7.18 mmol), and potassium carbonate (1.98 g, 14.36 mmol) were dissolved in toluene (20 mL), and stirred at 80° C. for 2 hours. 20 mL of water was added, and the reaction solution was extracted with ethyl acetate (15 mL×3). The combined organic phases were washed with saturated sodium bicarbonate solution (5 mL×2), saturated ammonium chloride solution (5 mL×2) and saturated brine (5 mL×2) successively, dried over anhydrous sodium sulfate, filtered, and the filtrate was concentrated under reduced pressure. The resulting residue was purified by silica gel column chromatography with petroleum ether and ethyl acetate as eluent system to obtain the title product tert-butyl 4-(3-(2-(4-chloro-2-fluorophenyl)-2-oxoethoxy)-2-nitrophenyl)-3,6-dihydropyridine-1(2H)-carboxylate (3.1 g, yellow solid) with a yield of 87.9%.
MS m/z (ESI): 491.1 [M+1]
Tert-butyl 4-(3-(2-(4-chloro-2-fluorophenyl)-2-oxoethoxy)-2-nitrophenyl)-3,6-dihydropyridine-1(2H)-carboxylate (3.10 g, 6.31 mmol) and paraformaldehyde (1.13 g, 12.62 mmol) were dissolved in 30 mL of methanol and 10 mL of water, and palladium/carbon (310 mg, 10%) was added. The reaction system was purged with hydrogen gas three times, stirred for 12 hours, and filtered. The filtrate was concentrated under reduced pressure, and the resulting residue was purified by silica gel column chromatography with petroleum ether and ethyl acetate as eluent system to obtain the title product tert-butyl 4-(3-(4-chloro-2-fluorophenyl)-4-methyl-3,4-dihydro-2H-benzo[b][1,4]oxazin-5-yl)-3,6-dihydropyridine-1(2H)-carboxylate (1.30 g, yellow oil) with a yield of 44.9%.
MS m/z (ESI): 459.1 [M+1]
Using tert-butyl 4-(3-(4-chloro-2-fluorophenyl)-4-methyl-3,4-dihydro-2H-benzo[b][1,4]oxazin-5-yl)-3,6-dihydropyridine-1(2H)carboxylate as the starting material, and referring to Step 5 to Step 8 of Example 1, the product 2-((4-(3-(4-chloro-2-fluorophenyl)-4-methyl-3,4-dihydro-2H-benzo[b][1,4]oxazin-5-yl)piperidin-1-yl)methyl)-3-(((S)-oxetan-2-yl)methyl)-3H-imidazolo[4,5-b]pyridine-5-carboxylic acid was obtain.
MS m/z (ESI): 606.2 [M+1]
MS m/z (ESI): 606.2 [M+1]
MS m/z (ESI): 606.2 [M+1]
Using methyl 6-fluoro-5-nitropicolinate and 2-(1-(aminomethyl)cyclopropyl) acetonitrile as the starting materials, and referring to the synthesis of Im-2, the final product methyl 2-(chloromethyl)-3-((1-(cyanomethyl)cyclopropyl)methyl)-3H-imidazolo[4,5-b]pyridine-5-carboxylate was obtained
MS m/z (ESI): 319.0 [M+1]
Using methyl 2-(chloromethyl)-3-((1-(cyanomethyl)cyclopropyl)methyl)-3H-imidazolo[4,5-b]pyridine-5-carboxylate and 4-[2-(4-chloro-2-fluorophenyl)-4-fluoro-2H-chromen-8-yl]piperidine as the starting materials, and referring to the synthesis of Step 7 to Step 8 of Example 1, the product 2-((4-(2-(4-chloro-2-fluorophenyl)-4-fluoro-2H-chromen-8-yl)piperidin-1-yl)methyl)-3-(1-(cyanomethyl)cyclopropyl)methyl)-3H-imidazolo[4,5-b]pyridine-5-carboxylic acid was obtained.
MS m/z (ESI): 630.2 [M+1]
MS m/z (ESI): 630.2 [M+1]
MS m/z (ESI): 630.2 [M+1]
(E)-1-(3-bromo-2-hydroxyphenyl)-3-(4-chloro-2-fluorophenyl)prop-2-en-1-one (500 mg, 1.41 mmol) was dissolved in methanol (15 mL), sodium borohydride (64 mg, 1.69 mmol) was added, and stirred at room temperature for 2 hours. Water was added to quench the reaction, and the reaction solution was extracted with dichloromethane (30 mL×3), washed with saturated sodium chloride solution (20 mL×2), dried over anhydrous sodium sulfate, filtered, and the filtrate concentrated under reduced pressure. The resulting residue was purified by silica gel column chromatography with petroleum ether and ethyl acetate as eluent system to obtain (E)-2-bromo-6-(3-(4-chloro-2-fluorophenyl)-1-hydroxyallyl)phenol (454 mg, yield: 90.0%).
MS m/z (ESI): 356.9 [M+1].
(E)-2-bromo-6-(3-(4-chloro-2-fluorophenyl)-1-hydroxyallyl)phenol (300 mg, 0.84 mmol) was dissolved in dichloromethane (10 mL), p-toluenesulfonic acid (29 mg, 0.17 mmol) was added, and stir at room temperature for 2 hours. Water was added to quench the reaction, and the reaction solution was extracted with dichloromethane (30 mL×3), washed with saturated sodium chloride solution (20 mL×2), dried over anhydrous sodium sulfate, filtered, and the filtrate concentrated under reduced pressure. The resulting residue was purified by silica gel column chromatography with petroleum ether and ethyl acetate as eluent system to obtain (8-bromo-2-(4-chloro-2-fluorophenyl)-2H-chromene (200 mg, yield: 70.1%)
MS m/z (ESI): 338.9[M+1].
(8-Bromo-2-(4-chloro-2-fluorophenyl)-2H-chromene (200 mg, 0.59 mmol) was dissolved in THE (10 mL), a solution of borane (0.71 mL, 0.71 mmol) in THE was added, and stirred at 0° C. for 1 hour. 2 mL of water was added, followed by the addition of NaOH (71 mg, 1.77 mmol) and 0.1 mL of hydrogen peroxide solution, and stirred at 40° C. for 2 hours. 10 mL of water was added to quench the reaction, and the reaction solution was extracted with dichloromethane (30 mL×3), washed with saturated sodium chloride solution (20 mL×2), dried over anhydrous sodium sulfate, filtered, and the filtrate concentrated under reduced pressure. The resulting residue was purified by silica gel column chromatography with petroleum ether and ethyl acetate as eluent system to obtain 8-bromo-2-(4-chloro-2-fluorophenyl)chroman-3-ol (63 mg, yield: 29.8%).
MS m/z (ESI): 356.9 [M+1].
8-Bromo-2-(4-chloro-2-fluorophenyl)chroman-3-ol (500 mg, 1.40 mmol) was dissolved in DCM (20 mL), Dess Martin oxidant (0.71 mL, 1.67 mmol) was added, and stirred at 0° C. for 1 hour. 10 mL of water was added to quench the reaction, and the reaction solution was extracted with dichloromethane (30 mL×3), washed with saturated sodium chloride solution (20 mL×2), dried over anhydrous sodium sulfate, filtered, and the filtrate concentrated under reduced pressure. The resulting residue was purified by silica gel column chromatography with petroleum ether and ethyl acetate as eluent system to obtain 8-bromo-2-(4-chloro-2-fluorophenyl)chroman-3-one (448 mg, yield: 89.9%).
MS m/z (ESI): 354.9[M+1].
Using 8-bromo-2-(4-chloro-2-fluorophenyl)chroman-3-one as the starting material, and referring to Step 3 to Step 5 of Example 1, the product tert-butyl 4-(2-(4-chloro-2-fluorophenyl)-3,3-difluorochroman-8-yl)piperidine-1-carboxylate was obtained.
MS m/z (ESI): 482.2 [M+1]
Using tert-butyl 4-(2-(4-chloro-2-fluorophenyl)-3,3-difluorochroman-8-yl)piperidine-1-carboxylate as the starting material, and referring to Step 6 of Example 1, the product 4-(2-(4-chloro-2-fluorophenyl)-3-fluoro-2H-chromen-8-yl)piperidine was obtained.
MS m/z (ESI): 362.1 [M+1]
Using 4-(2-(4-chloro-2-fluorophenyl)-3-fluoro-2H-chromen-8-yl)piperidine as the starting material, and referring to Step 7 and Step 8 of Example 1, the product 2-((4-(2-(4-chloro-2-fluorophenyl)-3-fluoro-2H-chromen-8-yl)piperidine-1-1)methyl)-3-(((S)-oxetan-2-yl)methyl)-3H-imidazolo[4,5-b]pyridine-5-carboxylic acid was obtain.
MS m/z (ESI): 607.1 [M+1]
MS m/z (ESI): 607.1 [M+1].
MS m/z (ESI): 607.1 [M+1].
Using 4-formyl-3-hydroxybenzonitrile as the starting material and referring to Example 24, the product 2-((4-(2-(4-cyano-2-(methoxy-d3)phenyl)-4-fluoro-2H-chromen-8-yl)piperidin-1-yl)methyl)-1-(((S)-oxetan-2-yl)methyl)-1H-benzo[d]imidazole-6-carboxylic acid was obtained.
MS m/z (ESI): 612.2[M+1].
MS m/z (ESI): 612.2 [M+1].
MS m/z (ESI): 612.2 [M+1].
Using 4-formyl-3-hydroxybenzonitrile as the starting material and referring to Example 20, the product 2-((4-2-(4-cyano-2-(methoxy-d3)phenyl)-4-fluoro-2H-chromen-8-yl)piperidin-1-yl)methyl)-3-((1-(fluoromethyl)cyclopropyl)methyl)-3H-imidazolo[4,5-b]pyridine-5-carboxylic acid was obtained.
MS m/z (ESI): 629.2 [M+1]
MS m/z (ESI): 629.2 [M+1].
MS m/z (ESI): 629.2 [M+1].
1-(4-Chloro-2-hydroxyphenyl)ethan-1-one 36a (15 g, 87.93 mmol), deuterated iodomethane (16.57 g, 114.31 mmol), and anhydrous potassium carbonate (36.46 g, 0.26 mol) were dispersed in DMF (150 mL). The reaction solution was heated to 50° C. and stirred vigorously for 12 hours. The reaction was stopped, the reaction solution was filtered through diatomaceous earth, and the filtrate was concentrated under reduced pressure. The resulting residue was purified by silica gel column chromatography with petroleum ether and ethyl acetate as eluent system to obtain the title product 1-(4-chloro-2-(methoxy-d3)phenyl)ethan-1-one 36b (15 g) with a yield of 90.9%.
MS m/z (ESI): 188.1 [M+1].
Tert-butyl 4-(3-acetyl-2-hydroxyphenyl)piperidine-1-carboxylate Im-7 (25 g, 79.94 mmol) was dissolved in tetrahydrofuran (300 mL). The solution was cooled in a dry ice/ethanol bath, and LiHMDS (18.4 mL, 0.184 mol, 1 M in THF) was slowly added thereto. After the completion of addition, the mixture were stirred for 30 minutes. 1-(4-Chloro-2-(methoxy-d3)phenyl)ethan-1-one 36b (15 g, 79.94 mmol) was dissolved in THE (30 mL), this solution was slowly added to the aforementioned reaction, and stirred for 40 minutes in the dry ice/ethanol bath. The reaction was stopped, the dry ice/ethanol bath was removed, saturated ammonium chloride solution was added to quench the reaction, and the reaction solution was extracted with ethyl acetate (300 mL×2). The combined organic phases were washed with saturated sodium chloride (500 mL), dried over anhydrous sodium sulfate, filtered, and the filtrate was concentrated under reduced pressure. The resulting residue was purified by silica gel column chromatography with petroleum ether and ethyl acetate as eluent system to obtain the title product tert-butyl 4-(3-(3-(4-chloro-2-(methoxy-d3)phenyl)-3-hydroxybutanoyl)-2-hydroxyphenyl)piperidine-1-carboxylate 36c (31 g) with a yield of 76.5%.
MS m/z (ESI): 507.2 [M+1].
Tert-butyl 4-(3-(3-(4-chloro-2-(methoxy-d3)phenyl)-3-hydroxybutanoyl)-2-hydroxyphenyl)piperidine-1-carboxylate 36c (2.00 g, 4.07 mmol) and BAST (10 mL) were dissolved in DMF (10 mL), then ethanol (20 μL) was added, and the reaction solution was stirred a for 4 hours. The reaction was stopped, the reaction solution was slowly added to ice water, and extracted with ethyl acetate (50 mL×2). The combined organic phases were washed with water (100 mL), washed with saturated sodium bicarbonate (100 mL), dried over anhydrous sodium sulfate, filtered, and the filtrate was concentrated under reduced pressure. The resulting residue was purified by silica gel column chromatography with petroleum ether and ethyl acetate as eluent system to obtain the title product tert-butyl 4-(2-(4-chloro-2-(methoxy-d3)phenyl)-4-fluoro-2-methyl-2H-chromen-8-yl)piperidine-1-carboxylate 36d (750 mg) with a yield of 38.7%.
MS m/z (ESI): 491.2 [M+1].
Tert-butyl 4-(2-(4-chloro-2-(methoxy-d3)phenyl)-4-fluoro-2-methyl-2H-chromen-8-yl)piperidine-1-carboxylate 36d (750 mg, 1.53 mmol), boron trifluoride etherate (543 mg, 3.83 mmol), and powdered 4 A molecular sieve (750 mg) were dispersed in dichloromethane (10 mL), and stirred at 0° C. for 3 hours. The reaction was stopped, and saturated sodium bicarbonate solution was added to the reaction solution to quench the reaction. The mixture was filtered through diatomaceous earth, the filtrate was left to stand, the organic layer was separated, and the water layer was extracted with dichloromethane (20 mL×2). The combined organic phases were dried over anhydrous sodium sulfate, filtered, and the filtrate was concentrated under reduced pressure. The resulting residue was purified by silica gel column chromatography with dichloromethane and methanol as eluent system to obtain the title product 4-(2-(4-chloro-2-(methoxy-d3)phenyl)-4-fluoro-2-methyl-2H-chromen-8-yl)piperidine 36e (490 mg) with a yield of 82.1%.
MS m/z (ESI): 391.2 [M+1].
4-(2-(4-Chloro-2-(methoxy-d3)phenyl)-4-fluoro-2-methyl-2H-chromen-8-yl)piperidine 36e (490 mg, 1.25 mmol), methyl (S)-2-(chloromethyl)-3-(oxetan-2-ylmethyl)-3H-imidazolo[4,5-b]pyridine-5-carboxylate Im-2 (371 mg, 1.25 mmol), and anhydrous potassium carbonate (518 mg, 3.75 mmol) were dispersed in acetonitrile (8 mL). The reaction solution was heated to 50° C. and vigorously stirred for 3 hours. The reaction was stopped, the reaction solution was cooled to room temperature, filtered through diatomaceous earth, and the filtrate was concentrated under reduced pressure. The resulting residue was purified by silica gel column chromatography with ethyl acetate as eluent system, and then the purified resulting sample was subjected to chiral HPLC separation to obtain the title product methyl 2-((4-((R)-2-(4-chloro-2-(methoxy-d3)phenyl)-2-methyl-2H-chromen-8-yl)piperidin-1-yl)methyl)-3-(((S)-oxetan-2-yl)methyl)-3H-imidazolo[4,5-b]pyridine-5-carboxylate 36f (210 mg) with a yield of 26.5%.
MS m/z (ESI): 632.2 [M+1].
Methyl 2-((4-((R)-2-(4-chloro-2-(methoxy-d3)phenyl)-2-methyl-2H-chromen-8-yl)piperidin-1-yl)methyl)-3-(((S)-oxetan-2-yl)methyl)-3H-imidazolo[4,5-b]pyridine-5-carboxylate 36f (210 mg, 332.19 μmol) and lithium hydroxide (133 mg, 3.32 mmol) were dissolved in a 9 mL mixed solvent of THF, water, and methanol (4:4:1), and stirred for 3 hours. The reaction was stopped, the pH was adjusted to 6 with formic acid, the reaction solution was concentrated under reduced pressure. The resulting residue was purified by preparative HPLC to obtain the title product 2-((4-(R)-2-(4-chloro-2-(methoxy-d3)phenyl)-2-methyl-2H-chromen-8-yl)piperidin-1-yl)methyl)-3-(((S)-oxetan-2-yl)methyl)-3H-imidazolo[4,5-b]pyridine-5-carboxylic acid 36 (170 mg), with a yield of 82.8%.
MS m/z (ESI): 618.2 [M+1].
1H NMR (400 MHz, MeOD) δ 8.16-7.97 (m, 2H), 7.29 (d, J=8.2 Hz, 1H), 7.08-6.98 (m, 2H), 6.94-6.85 (m, 2H), 6.81 (t, J=7.5 Hz, 1H), 6.57 (d, J=9.8 Hz, 1H), 5.78 (d, J=9.8 Hz, 1H), 5.25 (dd, J=7.5, 3.0 Hz, 1H), 4.96 (dd, J=14.9, 6.7 Hz, 1H), 4.83 (dd, J=14.9, 3.1 Hz, 1H), 4.66-4.53 (m, 1H), 4.48-4.35 (m, 1H), 4.25 (d, J=14.2 Hz, 1H), 4.16 (d, J=14.2 Hz, 1H), 3.25 (d, J=11.5 Hz, 1H), 3.12 (d, J=11.5 Hz, 1H), 2.91 (s, 1H), 2.83-2.70 (m, 1H), 2.61-2.41 (m, 3H), 1.85 (q, J=3.9 Hz, 2H), 1.78 (s, 3H), 1.68 (d, J=3.7 Hz, 1H), 1.59 (d, J=14.9 Hz, 1H).
Using tert-butyl 4-(3-acetyl-2-hydroxyphenyl)piperidine-1-carboxylate Im-7 and 1-(4-chloro-2-fluorophenyl)ethan-1-one as the starting materials, and referring to Step 2 to Step 6 of Example 36, 2-((4-(R)-2-(4-chloro-2-fluorophenyl)-4-fluoro-2-methyl-2H-chromen-8-yl)piperidin-1-yl)methyl)-3-(((S)-oxetan-2-yl)methyl)-3H-imidazolo[4,5-b]pyridine-5-carboxylic acid 37 was obtained.
MS m/z (ESI): 621.2 [M+1].
Referring to the synthesis method of Example 37, using 1-(4-chloro-2-fluorophenyl)ethan-1-one 38a (5 g, 28.97 mmol), Im-7 (9.25 g, 28.97 mmol), LiHMDS (66.6 mL, 66.63 mmol), and THE (100 mL) as the starting materials, the title product tert-butyl 4-(3-(3-4-chloro-2-fluorophenyl)-3-hydroxybutanoyl)-2-hydroxyphenyl)piperidine-1-carboxylate 41b (7.60 g) was obtained with a yield of 53.3%.
MS m/z (ESI): 492.2 [M+1].
Tert-butyl 4-(3-(3-(4-chloro-2-fluorophenyl)-3-hydroxybutanoyl)-2-hydroxyphenyl)piperidine-1-carboxylate 38b (5 g, 10.16 mmol) and p-toluenesulfonic acid (5.25 g, 30.48 mmol) were dissolved in toluene (50 mL). The reaction solution was heated to 100° C. and stirred for 5 hours. The reaction was stopped, the reaction solution was cooled to room temperature, and 2 M sodium hydroxide solution was added thereto to quench the reaction. The organic layer was separated, and the water layer was extracted with dichloromethane (50 mL×3). The combined organic phases were dried over anhydrous sodium sulfate, filtered, and the filtrate was concentrated under reduced pressure. The resulting residue was purified by silica gel column chromatography with dichloromethane and methanol as eluent system to obtain the title product 2-(4-chloro-2-fluorophenyl)-2-methyl-8-(piperidin-4-yl)chroman-4-one 38c (2.36 g) with a yield of 62.1%.
MS m/z (ESI): 374.1 [M+1].
2-(4-Chloro-2-fluorophenyl)-2-methyl-8-(piperidin-4-yl)chroman-4-one 38c (2 g, 5.35 mmol) was dissolved in methanol (30 mL). In an ice bath, sodium borohydride (396 mg, 10.70 mmol) was slowly added in batches to the solution. After the completion of addition, the ice bath was removed, and the reaction solution was naturally raised to ambient temperature for 2 hours. The reaction was stopped, saturated ammonium chloride solution was added to the reaction solution to quench the reaction, the pH=10 with 1 M sodium hydroxide solution. The reaction solution was extracted with dichloromethane (50 mL×3). The combined organic phases were dried over anhydrous sodium sulfate, filtered, and the filtrate was concentrated under reduced pressure to obtain the title product 2-(4-chloro-2-fluorophenyl)-2-methyl-8-(piperidin-4-yl)chroman-4-ol 38d (1.88 g) with a yield of 93.5%. The compound was not purified and was directly used for the next reaction.
MS m/z (ESI): 376.1 [M+1]
2-(4-Chloro-2-fluorophenyl)-2-methyl-8-(piperidin-4-yl)chroman-4-ol 38d (1.50 g, 3.99 mmol) and p-toluenesulfonic acid (2.06 g, 11.97 mmol) were dissolved in toluene (20 mL). The reaction solution was heated to 100° C. and stirred for 30 minutes. The reaction was stopped, the reaction solution was cooled to room temperature, 2 M sodium hydroxide solution was added thereto to quench the reaction. The organic layer was separated, and the water layer was extracted with dichloromethane (30 mL×3). The combined organic phases were dried over anhydrous sodium sulfate, filtered, and the filtrate was concentrated under reduced pressure to obtain the title product 4-(2-(4-chloro-2-fluorophenyl)-2-methyl-2H-chromen-8-yl)piperidine 38e (1.02 g) with a yield of 71.4%. The compound is not purified and can be directly used for the next reaction.
MS m/z (ESI): 358.1 [M+1].
Referring to the synthesis method of Step 5 of Example 37, using 4-(2-(4-chloro-2-fluorophenyl)-2-methyl-2H-chromen-8-yl)piperidine 38e (500 mg, 1.40 mmol), methyl (S)-2-(chloromethyl)-3-(oxetan-2-ylmethyl)-3H-imidazolo[4,5-b]pyridine-5-carboxylate Im-2 (413 mg, 1.40 mmol), anhydrous potassium carbonate (580 mg, 4.20 mmol), and acetonitrile (10 mL) as the starting materials, the title product methyl 2-((4—((R)-2-(4-chloro-2-fluorophenyl)-2-methyl-2H-chromen-8-yl)piperidin-1-yl)methyl)-3-(((S)-oxetan-2-yl)methyl)-3H-imidazolo[4,5-b]pyridine-5-carboxylate 41f (263 mg) was obtained with a yield of 30.5%.
MS m/z (ESI): 617.2 [M+1]
Referring to the synthesis method of Step 6 of Example 37, using methyl 2-((4-((R)-2-(4-chloro-2-fluorophenyl)-2-methyl-2H-chromen-8-yl)piperidin-1-yl)methyl)-3-(((S)-oxetan-2-yl)methyl)-3H-imidazolo[4,5-b]pyridine-5-carboxylate 38f (100 mg, 162 μmol) and lithium hydroxide (39 mg, 1.62 mmol) as the starting materials, the title product 2-((4-(R)-2-(4-chloro-2-fluorophenyl)-2-methyl-2H-chromen-8-yl)piperidin-1-yl)methyl)-3-(((S)-oxetan-2-yl)methyl)-3H-imidazolo[4,5-b]pyridine-5-carboxylic acid 38 (76 mg) was obtained with a yield of 77.8%.
MS m/z (ESI): 603.2 [M+1].
Referring to the synthesis method of Example 36, using Im-1 as the starting material, the title product 2-((4-(R)-2-(4-chloro-2-(methoxy-d3)phenyl)-2-methyl-2H-chromen-8-yl)piperidin-1-yl)methyl)-3-(((S)-oxetan-2-yl)methyl)-1H-benzo[d]imidazole-6-carboxylic acid was obtained.
MS m/z (ESI): 617.3 [M+1].
4-Chloro-2-fluoro-1-iodobenzene (5 g, 19.50 mmol) and toluene (50 mL) were added to a 100 mL flask. Isopropanol magnesium chloride (12.9 mL, 3M, 38.99 mmol) was added at −30° C., and the reaction solution was reacted at −20° C. for 2 hours. Then N,N-dimethylformamide-D7 (3.12 g, 38.99 mmol) was added to the reaction solution and reacted at 0° C. for 1 hour. The reaction was stopped, the reaction solution was quenched with saturated aqueous ammonium chloride solution, followed by the addition of water (50 mL), and extracted with ethyl acetate (20 mL×3). The organic phase was washed with saturated sodium chloride solution (20 mL), dried over anhydrous sodium sulfate, filtered, and concentrated to dryness by rotary evaporation. The resulting residue was purified by silica gel column chromatography with petroleum ether and ethyl acetate as eluent system to obtain the title product 4-chloro-2-fluoro<α-2H>benzaldehyde 40b (2.7 g), yield: 86.79%.
MS m/z (ESI): 160.0 [M+1].
4-Chloro-2-fluoro<α-2H>benzaldehyde 40b (1.5 g, 9.40 mmol), tert-butyl 4-(3-acetyl-2-hydroxyphenyl)piperidine-1-carboxylate Im-7 (3.00 g, 9.40 mmol), and tetrahydrofuran (40 mL) were added to a 100 mL flask. Sodium hydride (1.13 g, 28.20 mmol, 60% purity) was added at 0° C., and the reaction solution was reacted for 3 hours at 25° C. The reaction was stopped, the reaction solution was quenched with saturated aqueous ammonium chloride solution, followed by the addition of water (20 mL), and extracted with ethyl acetate (20 mL×3). The organic phase was washed with saturated sodium chloride solution (20 mL), dried over anhydrous sodium sulfate, filtered, and concentrated to dryness by rotary evaporation. The resulting residue was purified by silica gel column chromatography with petroleum ether and ethyl acetate as eluent system to obtain the title product tert-butyl 4-(3-(3-(4-chloro-2-fluorophenyl)acryloyl-3-d-3-d)-2-hydroxyphenyl)piperidine-1-carboxylate 40c (3 g) with a yield of 69.23%.
MS m/z (ESI): 461.1 [M+1].
Using tert-butyl 4-(3-(3-(4-chloro-2-fluorophenyl)acryloyl-3-d-3-d)-2-hydroxyphenyl)piperidine-1-carboxylate 40c as the starting material, and referring to the synthesis method of Step 3 to Step 6 of Example 36, 2-((4-(R)-2-(4-chloro-2-fluorophenyl)-4-fluoro-2H-chromen-8-yl-2-d)piperidin-1-yl)methyl)-3-(((S)-oxetan-2-yl)methyl)-3H-imidazolo[4,5-b]pyridine-5-carboxylic acid 40 was obtained.
MS m/z (ESI): 608.1 [M+1].
1H NMR (400 MHz, DMSO-d6) δ 8.10 (d, 1H), 7.97 (d, 1H), 7.54 (dd, 1H), 7.41 (t, 1H), 7.29 (dd, 1H), 7.24-7.15 (m, 2H), 6.96 (t, 1H), 5.67 (d, 1H), 5.20-5.11 (m, 1H), 4.88-4.79 (m, 1H), 4.74-4.65 (m, 1H), 4.53-4.43 (m, 1H), 4.41-4.31 (m, 1H), 3.97 (d, 1H), 3.88 (d, 1H), 2.98-2.91 (m, 1H), 2.87-2.79 (m, 1H), 2.75-2.62 (m, 2H), 2.49-2.41 (m, 1H), 2.25-2.07 (m, 2H), 1.73-1.59 (m, 2H), 1.54-1.41 (m, 1H), 1.37-1.29 (m, 1H).
Using 2-bromo-5-chlorophenol 41a as the starting material and referring to the synthesis method of Step 1 of Example 36, 1-bromo-4-chloro-2-(methoxy-d3)benzene 41b was obtained.
MS m/z (ESI): 223.9 [M+1].
Using 1-bromo-4-chloro-2-(methoxy-d3)benzene 41b as the starting material, and referring to the synthesis method of Step 1 of Example 40, 4-chloro-2-(methoxy-d3)<α-2H>benzaldehyde 41c was obtained.
MS m/z (ESI): 175.0 [M+1].
Using 4-chloro-2-(methoxy-d3)<α-2H>benzaldehyde 41c as the starting material, and referring to the synthesis method of Step 2 step of Example 40, tert-butyl 4-(3-(3-(4-chloro-2-(methoxy-d3)phenyl)acryloyl-3-d-3-d)-2-hydroxyphenyl)piperidine-1-carboxylate 41d was obtained.
MS m/z (ESI): 476.2 [M+1].
Using tert-butyl 4-(3-(3-(4-chloro-2-(methoxy-d3)phenyl)acryloyl-3-d-3-d)-2-hydroxyphenyl)piperidine-1-carboxylate 41d as the starting material, and referring to the synthesis method of Step 3 to Step 6 of Example 36, 2-((4-(R)-2-(4-chloro-2-(methoxy-d3)phenyl)-4-fluoro-2H-chromen-8-yl-2-d)piperidin-1-yl)methyl)-3-(((S)-oxetan-2-yl)methyl)-3H-imidazolo[4,5-b]pyridine-5-carboxylic acid 41 was obtained.
MS m/z (ESI): 623.2 [M+1].
1H NMR (400 MHz, Methanol-d4) δ 8.14-8.04 (m, 2H), 7.31 (d, 1H), 7.20-7.13 (m, 2H), 7.05 (d, 1H), 6.96-6.87 (m, 2H), 5.36 (d, 1H), 5.29-5.24 (m, 1H), 5.03-4.93 (m, 1H), 4.82-4.75 (m, 1H), 4.65-4.55 (m, 1H), 4.45-4.36 (m, 1H), 4.20 (d, 1H), 4.10 (d, 1H), 3.23-3.15 (m, 1H), 3.09-3.02 (m, 1H), 2.91-2.86 (m, 1H), 2.81-2.72 (m, 1H), 2.57-2.37 (m, 3H), 1.88-1.78 (m, 2H), 1.71-1.63 (m, 1H), 1.59-1.52 (m, 1H).
4-Chloro-2-fluoro-1-iodobenzene 42a (5 g, 19.50 mmol) and toluene (50 mL) were added to a 100 mL flask. Isopropanol magnesium chloride (12.9 mL, 3M, 38.99 mmol) was added at −30° C., and the reaction solution was reacted at −20° C. for 2 hours. Then N,N-dimethylformamide-D7 (3.12 g, 38.99 mmol) was added to the reaction solution and reacted at 0° C. for 1 hour. The reaction was stopped, the reaction solution was quenched with saturated aqueous ammonium chloride solution, followed by the addition of water (50 mL), and extracted with ethyl acetate (20 mL×3). The organic phase was washed with saturated sodium chloride solution (20 mL), dried over anhydrous sodium sulfate, filtered, and concentrated to dryness by rotary evaporation. The resulting residue was purified by silica gel column chromatography with petroleum ether and ethyl acetate as eluent system to obtain the title product 4-chloro-2-fluoro<α-2H>benzaldehyde 42b (2.7 g), yield: 86.79%.
MS m/z (ESI): 160.0 [M+1].
4-Chloro-2-fluoro<α-2H>benzaldehyde 42b (1.5 g, 9.40 mmol), tert-butyl 4-(3-acetyl-2-hydroxyphenyl)piperidine-1-carboxylate Im-7 (3.00 g, 9.40 mmol), and tetrahydrofuran (40 mL) were added to a 100 mL flask. Sodium hydride (1.13 g, 28.20 mmol, 60% purity) was added at 0° C., and the reaction solution was reacted for 3 hours at 25° C. The reaction was stopped, the reaction solution was quenched with saturated aqueous ammonium chloride solution, followed by the addition of water (20 mL), and extracted with ethyl acetate (20 mL×3). The organic phase was washed with saturated sodium chloride solution (20 mL), dried over anhydrous sodium sulfate, filtered, and concentrated to dryness by rotary evaporation. The resulting residue was purified by silica gel column chromatography with petroleum ether and ethyl acetate as eluent system to obtain the title product tert-butyl 4-(3-(3-(4-chloro-2-fluorophenyl)acryloyl-3-d-3-d)-2-hydroxyphenyl)piperidine-1-carboxylate 42c (3 g) with a yield of 69.23%.
MS m/z (ESI): 461.1 [M+1].
Tert-butyl 4-(3-(3-(4-chloro-2-fluorophenyl)acryloyl-3-d-3-d)-2-hydroxyphenyl)piperidine-1-carboxylate 42c (3 g, 6.51 mmol) and isopropanol (50 mL) were added to a 250 mL flask, and sodium borohydride (369.33 mg, 9.76 mmol) was added at 0° C. Then the reaction solution was reacted at 20° C. for 3 hours. The reaction was stopped, the reaction solution was quenched with water (10 mL), and extracted with ethyl acetate (20 mL×3). The organic phase was washed with saturated sodium chloride solution (20 mL), dried over anhydrous sodium sulfate, filtered, and concentrated to dryness by rotary evaporation to obtain the title product tert-butyl 4-(3-(3-(4-chloro-2-fluorophenyl)-1-hydroxyallyl-3-d)-2-hydroxyphenyl)piperidine-1-carboxylate 42d (3 g), with a yield of 99.56%.
MS m/z (ESI): 463.1 [M+1].
Tert-butyl 4-(3-(3-(4-chloro-2-fluorophenyl)-1-hydroxyallyl-3-d)-2-hydroxyphenyl)piperidine-1-carboxylate 42d (3 g, 6.48 mmol) and N,N-dimethylformamide (30 mL) were added to a 100 mL flask, and p-toluenesulfonic acid (1.67 g, 9.72 mmol) was added at 25° C. Then the reaction solution was reacted at 50° C. for 4 hours. The reaction was stopped, the reaction solution was quenched with water (20 mL), and extracted with ethyl acetate (20 mL×3). The organic phase was washed with saturated sodium chloride solution (20 mL), dried over anhydrous sodium sulfate, filtered, and concentrated to dryness by rotary evaporation. The resulting residue was purified by silica gel column chromatography with petroleum ether and ethyl acetate as eluent system to obtain the title product tert-butyl 4-(2-(4-chloro-2-fluorophenyl)-2H-chromen-8-yl-2-d)piperidine-1-carboxylate 42e (1.7 g) with a yield of 58.96%.
MS m/z (ESI): 445.1 [M+1].
Tert-butyl 4-(2-(4-chloro-2-fluorophenyl)-2H-chromen-8-yl-2-d)piperidine-1-carboxylate 42e (1.7 g, 3.82 mmol) and dichloromethane (25 mL) were added to a 100 mL flask. 4 A molecular sieve (1.7 g) and boron trifluoride etherate (1.36 g, 9.55 mmol) were added at 0° C. Then the reaction solution was reacted at 0° C. for 2 hours. The reaction was stopped, the reaction solution was quenched with saturated sodium bicarbonate aqueous solution (10 mL), followed by the addition of water (10 mL), and extracted with dichloromethane (20 mL×3). The organic phase was washed with saturated sodium chloride solution (20 mL), dried over anhydrous sodium sulfate, filtered, and concentrated to dryness by rotary evaporation to obtain the title product 4-(2-(4-chloro-2-fluorophenyl)-2H-chromen-8-yl-2-d)piperidine 42f (1.3 g) with a yield of 98.67%.
MS m/z (ESI): 345.1 [M+1]
4-(2-(4-chloro-2-fluorophenyl)-2H-chromen-8-yl-2-d)piperidine 42f (1.3 g, 3.77 mmol) and acetonitrile (15 mL) were added to a 100 mL flask. Potassium carbonate (1.04 g, 7.54 mmol) and methyl (S)-2-(chloromethyl)-3-(oxetan-2-ylmethyl)-3H-imidazolo[4,5-b]pyridine-5-carboxylate Im2 (1.11 g, 3.77 mmol) were added at 25° C. Then the reaction solution was reacted at 25° C. for 10 hours. The reaction was stopped, the reaction solution was quenched with water (10 mL), and extracted with dichloromethane (10 mL×3). The organic phase was washed with saturated sodium chloride solution (10 mL), dried over anhydrous sodium sulfate, filtered, and concentrated to dryness by rotary evaporation. The resulting residue was purified by silica gel column chromatography with petroleum ether and ethyl acetate as eluent system to obtain the title product methyl 2-((4-(-(-2-(4-chloro-2-fluorophenyl)-2H-chromen-8-yl-2-d)piperidin-1-yl)methyl)-3-(((S)-oxetan-2-yl)methyl)-3H-imidazolo[4,5-b]pyridine-5-carboxylate 42 g (1.7 g,) with a yield of 74.65%.
MS m/z (ESI): 604.2 [M+1]
Methyl 2-((4-(-(-2-(4-chloro-2-fluorophenyl)-2H-chromen-8-2-yl-2-d)piperidin-1-yl)methyl)-3-(((S)-oxetan-2-yl)methyl)-3H-imidazolo[4,5-b]pyridin-5-carboxylate 42 g was subjected to chiral separation to obtain methyl 2-((4-((R)-2-(4-chloro-2-fluorophenyl)-2H-chromen-8-yl-2-d)piperidin-1-yl)methyl)-3-(((S)-oxetan-2-yl)methyl)-3H-imidazolo[4,5-b]pyridine-5-carboxylate 42h.
Chiral separation condition: D-H 4.6*250
Hexane:EtOH:MeOH:DEA=70:15:15:0.1%
F=1 mL T=35° C.
Methyl 2-((4-((R)-2-(4-chloro-2-fluorophenyl)-2H-chromen-8-yl-2-d)piperidin-1-yl)methyl)-3-(((S)-oxetan-2-yl)methyl)-3H-imidazolo[4,5-b]pyridine-5-carboxylate 42h (100 mg, 165.54 μmol) and methanol (2 mL) were added to a 25 mL flask, and lithium hydroxide (39.64 mg, 1.66 mmol) was dissolved in water (1 mL) and added dropwise to the reaction solution at 25° C. Then the reaction solution was reacted at 25° C. for 1 hour. The reaction was stopped, the reaction solution was quenched with formic acid (0.1 mL), followed by the addition of water (2 mL), and extracted with dichloromethane (2 mL×3). The organic phase was washed with saturated sodium chloride solution (2 mL), dried over anhydrous sodium sulfate, filtered, and concentrated to dryness by rotary evaporation. The resulting residue was purified by prep-HPLC to obtain the title product 2-((4-(R)-2-(4-chloro-2-fluorophenyl)-2H-chromen-8-2-yl-2-d)piperidin-1-yl)methyl)-3-(((S)-oxetan-2-yl)methyl)-3H-imidazolo[4,5-b]pyridine-5-carboxylic acid 42 (70 mg), with a yield of 71.66%.
MS m/z (ESI): 590.2 [M+1]
1H NMR (400 MHz, DMSO) δ 8.08 (d, 1H), 7.96 (d, 1H), 7.52 (dd, 1H), 7.34 (t, 1H), 7.27 (dd, 1H), 7.05 (dd, 1H), 6.98 (dd, 1H), 6.85 (t, 1H), 6.75 (d, 1H), 5.91 (d, 1H), 5.18-5.11 (m, 1H), 4.87-4.80 (m, 1H), 4.72-4.65 (m, 1H), 4.53-4.43 (m, 1H), 4.39-4.31 (m, 1H), 3.96 (d, 1H), 3.87 (d, 1H), 3.01-2.90 (m, 1H), 2.89-2.79 (m, 1H), 2.77-2.61 (m, 2H), 2.48-2.45 (m, 1H), 2.27-2.08 (m, 2H), 1.73-1.61 (m, 2H), 1.54-1.42 (m, 1H), 1.42-1.34 (m, 1H).
2-Bromo-5-chlorophenol 43a (10 g, 48.20 mmol), deuterated iodomethane (10.48 g, 72.30 mmol), and anhydrous potassium carbonate (13.33 g, 96.41 mol) were dispersed in DMF (100 mL). The reaction solution was heated to 50° C. and stirred vigorously for 12 hours. The reaction was stopped, the reaction solution was filtered through diatomaceous earth, and the filtrate was concentrated under reduced pressure. The resulting residue was purified by silica gel column chromatography with petroleum ether and ethyl acetate as eluent system to obtain the title product 1-bromo-4-chloro-2-(methoxy-d3)benzene 43b (10 g) with a yield of 92.5%.
MS m/z (ESI): 223.9 [M+1].
1-Bromo-4-chloro-2-(methoxy-d3)benzene 43b (1.6 g, 7.13 mmol) was dissolved in tetrahydrofuran (30 mL), the reaction system was purged with nitrogen gas, and n-BuLi (2.5 M, 3.42 mL) was slowly added thereto at −78° C. After the completion of addition, the reaction solution was stirred at −78° C. for 1 hour, and then N,N-dimethylformamide-D7 (856.71 mg, 10.69 mmol) was added dropwise thereto. The reaction system was stirred for 3 hours and naturally raised to room temperature. 20 mL of saturated ammonium chloride solution was slowly added thereto to quench the reaction, the reaction solution was extracted with ethyl acetate (30 mL×3), washed with saturated brine (30 mL×2), dried over anhydrous sodium sulfate, filtered, and concentrated to obtain a white solid 4-chloro-2-(methoxy-d3)-benzaldehyde-d 43c (1.2 g, 6.87 mmol) with a yield of 96.42%.
MS m/z (ESI): 175.0 [M+1].
4-Chloro-2-(methoxy-d3)-benzaldehyde-d 43c (700 mg, 4.01 mmol) and tert-butyl 4-(3-acetyl-2-hydroxyphenyl)piperidine-1-carboxylate Im-7 (1.28 g, 4.01 mmol) were dissolved in tetrahydrofuran (40 mL), and sodium hydride (481.05 mg, 12.03 mmol, 60% purity) was added in batches in an ice water bath. The reaction system was first stirred in an ice water bath for 0.5 hours, then placed at room temperature of 20° C. and stirred for 2.5 hours. After the reaction was completed, 20 mL of water was added dropwise to quench the reaction, the reaction solution was extracted with ethyl acetate (30 mL×3), washed with saturated brine (30 mL×2), dried over anhydrous sodium sulfate, filtered, and concentrated to obtain the crude product. The crude product was purified by silica gel column chromatography with petroleum ether and ethyl acetate as eluent system to obtain the title product tert-butyl (E)-4-(3-(3-(4-chloro-2-(methoxy-d3)phenyl)acryloyl-3-d-3-d)-2-hydroxyphenyl)piperidine-1-carboxylate 43d (1.5 g), yield: 78.6%.
MS m/z (ESI): 476.2 [M+1].
Tert-butyl (E)-4-(3-(3-(4-chloro-2-(methoxy-d3)phenyl)acryloyl-3-d-3-d)-2-hydroxyphenyl)piperidine-1-carboxylate 43d (1.4 g, 2.94 mmol) was dissolved in tetrahydrofuran (30 mL), and sodium borohydride (333.82 mg, 8.82 mmol) was added thereto in batches at room temperature. The reaction system was stirred at room temperature for 2 hours. After the reaction was completed, 20 mL of water was added dropwise to quench the reaction, and the reaction solution was extracted with ethyl acetate (30 mL×3), washed with saturated brine (30 mL×2), dried over anhydrous sodium sulfate, filtered, and concentrated to obtain the title product tert-butyl (E)-4-(3-(3-(4-chloro-2-(methoxy-d3)phenyl)-1-hydroxyallyl-3-d)-2-hydroxyphenyl)piperidine-1-carboxylate 43e (1.4 g).
MS m/z (ESI): 478.2 [M+1].
Tert-butyl (E)-4-(3-(3-(4-chloro-2-(methoxy-d3)phenyl)-1-hydroxyallyl-3-d)-2-hydroxyphenyl)piperidine-1-carboxylate 43e (1.40 g, 2.93 mmol) was dissolved in dichloromethane (20 mL), and p-toluenesulfonic acid (151.62 mg, 880.49 μmol) was added thereto. The reaction system was stirred at room temperature for 3 hours. After the reaction was completed, the reaction solution was concentrated directly to remove the solvent to obtain the crude product. The crude product was purified by silica gel column chromatography with petroleum ether and ethyl acetate as eluent system to obtain the title product tert-butyl 4-(2-(4-chloro-2-(methoxy-d3)phenyl)-2H-chromen-8-yl-2-d)piperidine-1-carboxylate 43f (600 mg, 1.30 mmol) with a yield of 44.4%.
MS m/z (ESI): 460.2 [M+1].
Tert-butyl 4-(2-(4-chloro-2-(methoxy-d3)phenyl)-2H-chromen-8-yl-2-d)piperidine-1-carboxylate 43f (260 mg, 565.22 μmol) was dissolved in dichloromethane (10 mL), and 4 A° molecular sieve (260 mg) and boron trifluoride etherate (240.66 mg, 1.70 mmol) were added thereto in an ice water bath. The reaction system was stirred in an ice water bath for 1 hour. After the reaction was completed, saturated sodium bicarbonate solution (10 mL) was added dropwise to quench the reaction. The reaction solution was extracted with dichloromethane (20 mL×3), washed with saturated brine (20 mL×2), dried over anhydrous sodium sulfate, filtered, and concentrated to obtain the crude 4-(2-(4-chloro-2-(methoxy-d3)phenyl)-2H-chromen-8-yl-2-d)piperidine 43 g (200 mg).
MS m/z (ESI): 360.2 [M+1].
4-(2-(4-Chloro-2-(methoxy-d3)phenyl)-2H-chromen-8-yl-2-d)piperidine 43 g (200 mg, 555.74 μmol, crude), methyl (S)-2-(chloromethyl)-3-(oxetan-2-ylmethyl)-3H-imidazolo[4,5-b]pyridine-5-carboxylate Im-2 (180.17 mg, 611.31 μmol) and potassium carbonate (230.42 mg, 1.67 mmol) were dissolved in acetonitrile (10 mL). The reaction system was stirred in an oil bath at 60° C. for 4 hours. After the reaction was completed, the reaction solution was diluted with water (10 mL), extracted with ethyl acetate (20 mL×3), washed with saturated brine (20 mL×2), dried over anhydrous sodium sulfate, filtered, and concentrated to obtain the crude product. The crude product was purified by silica gel column chromatography with petroleum ether and ethyl acetate as eluent system. The purified resulting sample was then subjected to chiral HPLC separation to obtain the title product methyl 2-((4-(R)-2-(4-chloro-2-(methoxy-d3)phenyl)-2H-chromen-8-yl-2-d)piperidin-1-yl)methyl)-3-(((S)-oxetan-2-yl)methyl)-3H-imidazolo[4,5-b]pyridine-5-carboxylate 43h (100 mg, 161.5 μmol,), yield: 29.1%.
MS m/z (ESI): 619.2 [M+1].
methyl 2-((4-(R)-2-(4-chloro-2-(methoxy-d3)phenyl)-2H-chromen-8-yl-2-d)piperidin-1-yl)methyl)-3-(((S)-oxetan-2-yl)methyl)-3H-imidazolo[4,5-b]pyridine-5-carboxylate 43h (100 mg, 161.5 μmol) and lithium hydroxide (38.8 mg, 1.62 mmol) were dissolved in a 9 mL mixed solvent of THF, water, and methanol (4:4:1), and stirred for 3 hours. The reaction was stopped, the pH was adjusted to 6 with formic acid, the reaction solution was concentrated under reduced pressure. The resulting residue was purified by preparative HPLC to obtain the title product 2-((4-((R)-2-(4-chloro-2-(methoxy-d3)phenyl)-2H-chromen-8-yl-2-d)piperidin-1-yl)methyl)-3-(((S)-oxetan-2-yl)methyl)-3H-imidazolo[4,5-b]pyridine-5-carboxylic acid 43 (60 mg), with a yield of 61.5%.
MS m/z (ESI): 605.2 [M+1].
1H NMR (400 MHz, DMSO) δ 8.08 (d, 1H), 7.96 (d, 1H), 7.22 (d, 1H), 7.14 (d, 1H), 7.02 (d, 1H), 6.99-6.91 (m, 2H), 6.82 (t, 1H), 6.66 (d, 1H), 5.86 (d, 1H), 5.17-5.11 (m, 1H), 4.86-4.77 (m, 1H), 4.73-4.65 (m, 1H), 4.51-4.45 (m, 1H), 4.38-4.30 (m, 1H), 3.97-3.84 (m, 2H), 2.98-2.91 (m, 1H), 2.87-2.81 (m, 1H), 2.76-2.64 (m, 2H), 2.47-2.45 (m, 1H), 2.24-2.09 (m, 2H), 1.70-1.64 (m, 2H), 1.50-1.38 (m, 2H).
Using 4-chloro-2-fluoro<α-2H>benzaldehyde 44a and 1-(3-bromo-2-hydroxyphenyl)ethan-1-one as the starting materials and referring to the synthesis method of Step 1 of Example 1, 1-(3-bromo-2-hydroxyphenyl)-3-(4-chloro-2-fluorophenyl)prop-2-en-1-one-3-d 44b was obtained.
MS m/z (ESI): 355.9 [M+1].
Using 1-(3-bromo-2-hydroxyphenyl)-3-(4-chloro-2-fluorophenyl)prop-2-en-1-one-3-d 44b as the starting material, and referring to the synthesis method of Example 33, 2-((4-(S)-2-(4-chloro-2-fluorophenyl)-3-fluoro-2H-chromen-8-yl-2d)piperidin-1-yl)methyl)-3-(((S)-oxetan-2-yl)methyl)-3H-imidazolo[4,5-b]pyridine-5-carboxylic acid 44 was obtained.
MS m/z (ESI): 608.1 [M+1].
Using 4-chloro-2-(methoxy-d3)<α-2H>benzaldehyde 45a and 1-(3-bromo-2-hydroxyphenyl)ethan-1-one were used as the starting materials, and referring to the synthesis method of Step 1 of Example 1, 1-(3-bromo-2-hydroxyphenyl)-3-(4-chloro-2-(methoxy-d3)phenyl)prop-2-en-1-one-3-d 45b was obtained.
MS m/z (ESI): 371.0 [M+1].
Using 1-(3-bromo-2-hydroxyphenyl)-3-(4-chloro-2-(methoxy-d3)phenyl)prop-2-en-1-one-3-d 45b as the starting material, and referring to the synthesis method of Example 33, 2-(4-(S)-2-(4-chloro-2-(methoxy-d3)phenyl)-3-fluoro-2H-chromen-8-yl-2-d)piperidin-1-yl)methyl)-3-(((S)-oxetan-2-yl)methyl)-3H-imidazolo[4,5-b]pyridine-5-carboxylic acid 45 was obtained.
MS m/z (ESI): 623.2 [M+1].
Using intermediate Im1 as the starting material, and referring to Example 40, the product 2-((4-((R)-2-(4-chloro-2-fluorophenyl)-4-fluoro-2H-chromen-8-yl-2-d)piperidin-1-yl)methyl)-1-(((S)-oxetan-2-yl)methyl)-1H-benzo[d]imidazole-6-carboxylic acid was obtained.
MS m/z (ESI): 607.2 [M+1]
Using intermediate Im1 as the starting material, and referring to the synthesis method of Example 42, the product 2-((4-((R)-2-(4-chloro-2-fluorophenyl)-2H-chromen-8-yl-2-d)piperidin-1-yl)methyl)-1-(((S)-oxetan-2-yl)methyl)-1H-benzo[d]imidazole-6-carboxylic acid was obtained.
MS m/z (ESI): 589.2 [M+1]
Referring to the synthesis method of Example 42, the product 2-((4-((R)-2-(4-chloro-2-fluorophenyl)-2H-chromen-8-yl)piperidin-1-yl)methyl)-3-(((S)-oxetan-2-yl)methyl)-3H-imidazolo[4,5-b]pyridine-5-carboxylic acid was obtained.
Tert-butyl 4-(3-acetyl-2-hydroxyphenyl)piperidine-1-carboxylate Im7 (20.3 g, 63.56 mmol) and tetrahydrofuran (300 mL) were added to a 1000 mL flask, cooled at 0° C. for 10 minutes, and sodium hydride (7.63 g, 190.67 mmol, 60% purity) was added. Then, 4-chloro-2-fluorobenzaldehyde 48a (10.08 g, 63.56 mmol) was dissolved in THF (100 mL) and slowly added dropwise into the reaction solution through a constant pressure dropping funnel for 20 minutes. After the completion of addition, the reaction solution was raised to 25° C. and reacted for 2 hours. The reaction was stopped, the reaction solution was quenched with saturated aqueous ammonium chloride solution (200 mL), followed by the addition of water (50 mL), and extracted with ethyl acetate (200 mL×3). The organic phase was washed with saturated sodium chloride solution (200 mL), dried over anhydrous sodium sulfate, filtered, concentrated to dryness by rotary evaporation, followed by the addition of ethyl acetate (60 mL), triturated (stirred for 15 minutes), and filtered. The filter cake was washed with petroleum ether (30 mL), and dried to obtain the title product tert-butyl 4-(3-(3-(4-chloro-2-fluorophenyl)acryloyl)-2-hydroxyphenyl)piperidine-1-carboxylate 48b (15.2 g), with a yield of 52.00%.
MS m/z (ESI): 460.1 [M+1]
Tert-butyl 4-(3-(3-(4-chloro-2-fluorophenyl)acryloyl)-2-hydroxyphenyl)piperidine-1-carboxylate 48b (25 g, 54.36 mmol) and isopropanol (500 mL) were added to a 1000 mL flask, and sodium borohydride (3.08 g, 81.53 mmol) was added at 0° C. Then the reaction solution was reacted at 20° C. for 3 hours. The reaction was stopped, the reaction solution was quenched with water (100 mL), and extracted with ethyl acetate (200 mL×3). The organic phase was washed with saturated sodium chloride solution (200 mL), dried over anhydrous sodium sulfate, filtered, and concentrated to dryness by rotary evaporation to obtain the title product tert-butyl 4-(3-(3-(4-chloro-2-fluorophenyl)-1-hydroxyallyl)-2-hydroxyphenyl)piperidine-1-carboxylate 48c (25 g) with a yield of 99.56%.
MS m/z (ESI): 462.1 [M+1].
Tert-butyl 4-(3-(3-(4-chloro-2-fluorophenyl)-1-hydroxyallyl)-2-hydroxyphenyl)piperidine-1-carboxylate 48c (25 g, 54.12 mmol) and N,N-dimethylformamide (300 mL) were added to a 500 mL flask, and p-toluenesulfonic acid (13.98 g, 81.18 mmol) was added at 25° C. Then the reaction solution was reacted at 50° C. for 4 hours. The reaction was stopped, the reaction solution was quenched with water (200 mL), and extracted with ethyl acetate (200 mL×3). The organic phase was washed with saturated sodium chloride solution (200 mL), dried over anhydrous sodium sulfate, filtered, and concentrated to dryness by rotary evaporation. The resulting residue was purified by silica gel column chromatography with petroleum ether and ethyl acetate as eluent system to obtain the title product tert-butyl 4-(2-(4-chloro-2-fluorophenyl)-2H-chromen-8-yl)piperidine-1-carboxylate 48d (13 g) with a yield of 54.11%.
MS m/z (ESI): 444.1 [M+1].
Tert-butyl 4-(2-(4-chloro-2-fluorophenyl)-2H-chromen-8-yl)piperidine-1-carboxylate 48d was subjected to chiral separation to obtain tert-butyl (R)-4-(2-(4-chloro-2-fluorophenyl)-2H-chromen-8-yl)piperidine-1-carboxylate 48e.
Chiral separation conditions
OD-H 4.6*150
Hexane:IPA:DEA=90:10:0.1%
F=1 mL T=35° C.
MS m/z (ESI): 444.1 [M+1]
Tert-butyl (R)-4-(2-(4-chloro-2-fluorophenyl)-2H-chromen-8-yl)piperidine-1-carboxylate 48e (2.55 g, 5.74 mmol) and dichloromethane (50 mL) were added to a 100 mL flask. 4 A molecular sieve (2.55 g) and boron trifluoride etherate (2.04 g, 14.36 mmol) were added at 0° C. Then the reaction solution was reacted at 0° C. for 2 hours. The reaction was stopped, the reaction solution was quenched with saturated sodium bicarbonate aqueous solution (10 mL), followed by the addition of water (10 mL), and extracted with dichloromethane (20 mL×3). The organic phase was washed with saturated sodium chloride solution (20 mL), dried over anhydrous sodium sulfate, filtered, and concentrated to dryness by rotary evaporation to obtain the title product (R)-4-(2-(4-chloro-2-fluorophenyl)-2H-chromen-8-yl)piperidine 48f (1.97 g,) with a yield of 100%.
MS m/z (ESI): 344.1 [M+1]
(R)-4-(2-(4-Chloro-2-fluorophenyl)-2H-chromen-8-yl)piperidine 48f (1.97 g, 5.73 mmol) and acetonitrile (50 mL) were added to a 100 mL flask. Potassium carbonate (1.58 g, 11.46 mmol) and methyl (S)-2-(chloromethyl)-3-(oxetan-2-ylmethyl)-3H-imidazolo[4,5-b]pyridine-5-carboxylate Im2 (1.69 g, 5.73 mmol) were added at 25° C. Then the reaction solution was reacted at 25° C. for 10 hours. The reaction was stopped, the reaction solution was quenched with water (20 mL), and extracted with dichloromethane (20 mL×3). The organic phase was washed with saturated sodium chloride solution (20 mL), dried over anhydrous sodium sulfate, filtered, and concentrated to dryness by rotary evaporation. The resulting residue was purified by silica gel column chromatography with petroleum ether and ethyl acetate as eluent system to obtain the title product methyl 2-((4-(R)-2-(4-chloro-2-fluorophenyl)-2H-chromen-8-yl)piperidin-1-yl)methyl)-3-(((S)-oxetan-2-yl)methyl)-3H-imidazolo[4,5-b]pyridine-5-carboxylate 48 g (3.1 g,) with a yield of 89.71%.
MS m/z (ESI): 603.2 [M+1]
Methyl2-((4-((R)-2-(4-chloro-2-fluorophenyl)-2H-chromen-8-yl)piperidin-1-yl)methyl)-3-(((S)-oxetan-2-yl)methyl)-3H-imidazolo[4,5-b]pyridine-5-carboxylate 48 g (3.1 g, 5.14 mmol) and methanol (25 mL) were added to a 100 mL flask. Lithium hydroxide (1.23 g, 51.40 mmol) was dissolved in water (10 mL) and added dropwise into the reaction solution at 25° C. Then the reaction solution was reacted at 25° C. for 1 hour. The reaction was stopped, the reaction solution was quenched with formic acid (1 mL), followed by the addition of water (20 mL), and extracted with dichloromethane (20 mL×3). The organic phase was washed with saturated sodium chloride solution (20 mL), dried over anhydrous sodium sulfate, filtered, and concentrated to dryness by rotary evaporation. The resulting residue was purified by prep-HPLC to obtain the title product 2-((4-(R)-2-(4-chloro-2-fluorophenyl)-2H-chromen-8-yl)piperidin-1-yl)methyl)-3-(((S)-oxetan-2-yl)methyl)-3H-imidazolo[4,5-b]pyridine-5-carboxylic acid 48 (2.1 g,) with a yield of 69.35%.
MS m/z (ESI): 589.1 [M+1]
1H NMR (400 MHz, MeOD) δ 8.14-8.03 (m, 2H), 7.40 (t, 1H), 7.25 (dd, 1H), 7.15 (dd, 1H), 7.05 (dd, 1H), 6.92 (dd, 1H), 6.84 (t, 1H), 6.68 (dd, 1H), 6.21 (dd, 1H), 5.82 (dd, 1H), 5.30-5.24 (m, 1H), 5.03-4.93 (m, 1H), 4.85-4.81 (m, 1H), 4.64-4.54 (m, 1H), 4.45-4.35 (m, 1H), 4.23 (d, 1H), 4.13 (d, 1H), 3.25-3.18 (m, 1H), 3.12-3.05 (m, 1H), 2.95-2.85 (m, 1H), 2.83-2.70 (m, 1H), 2.57-2.38 (m, 3H), 1.88-1.78 (m, 2H), 1.78-1.63 (m, 1H), 1.59-1.51 (m, 1H).
Referring to Example 41, the product 2-((4-((R)-2-(4-chloro-2-(methoxy-d3)phenyl)-4-fluoro-2H-chromen-8-yl-2-d)piperidin-1-yl)methyl)-1-(((S)-oxetan-2-yl)methyl)-1H-benzo[d]imidazole-6-carboxylic acid was obtained.
MS m/z (ESI): 622.2 [M+1].
Referring to the synthesis method of Example 43, the product 2-((4-((R)-2-(4-chloro-2-(methoxy-d3)phenyl)-2H-chromen-8-yl-2-d)piperidin-1-yl)methyl)-1-(((S)-oxetan-2-yl)methyl)-1H-benzo[d]imidazole-6-carboxylic acid was obtained.
MS m/z (ESI): 604.2 [M+1].
Using 4-cyano-2-fluorobenzaldehyde and intermediate Im-2 as the starting materials, and referring to Example 42, the product 2-((4-(R)-2-(4-cyano-2-fluorophenyl)-2H-chromen-8-yl)piperidin-1-yl)methyl)-3-(((S)-oxetan-2-yl)methyl)-3H-imidazolo[4,5-b]pyridine-5-carboxylic acid was obtained.
MS m/z (ESI): 580.2 [M+1].
1H NMR (400 MHz, MeOD) δ 8.13-8.02 (m, 2H), 7.71-7.57 (m, 2H), 7.55-7.49 (m, 1H), 7.15-7.02 (m, 1H), 6.97-6.91 (m, 1H), 6.92-6.83 (m, 1H), 6.73-6.64 (m, 1H), 6.33-6.25 (m, 1H), 5.89-5.80 (m, 1H), 5.37-5.18 (m, 1H), 5.05-4.92 (m, 1H), 4.84-4.79 (m, 1H), 4.72-4.58 (m, 1H), 4.52-4.39 (m, 1H), 4.35-4.19 (m, 2H), 3.29-3.25 (m, 1H), 3.21-3.12 (m, 1H), 3.02-2.86 (m, 1H), 2.82-2.69 (m, 1H), 2.65-2.42 (m, 3H), 1.98-1.72 (m, 3H), 1.68-1.59 (m, 1H).
Using 4-cyano-2-fluorobenzaldehyde and intermediate Im-1 as the starting materials, and referring to Example 42, the product 2-((4-(R)-2-(4-cyano-2-fluorophenyl)-2H-chromen-8-yl)piperidin-1-yl)methyl)-1-(((S)-oxetan-2-yl)methyl)-1H-benzo[d]imidazole-6-carboxylic acid was obtained.
MS m/z (ESI): 579.2 [M+1].
1H NMR (400 MHz, DMSO) δ 8.25 (d, 1H), 7.95 (dd, 1H), 7.79 (dd, 1H), 7.70 (dd, 1H), 7.62 (d, 1H), 7.52 (t, 1H), 7.07 (dd, 1H), 6.99 (dd, 1H), 6.87 (t, 1H), 6.75 (dd, 1H), 6.33 (dd, 1H), 5.93 (dd, 1H), 5.11-5.00 (m, 1H), 4.85-4.71 (m, 1H), 4.67-4.58 (m, 1H), 4.52-4.44 (m, 1H), 4.42-4.31 (m, 1H), 3.92 (d, 1H), 3.75 (d, 1H), 3.04-2.92 (m, 1H), 2.83-2.62 (m, 3H), 2.46-2.38 (m, 1H), 2.23-2.02 (m, 2H), 1.73-1.56 (m, 2H), 1.48-1.34 (m, 2H).
Using Im-1 as the starting material, and referring to Example 48, the product 2-((4-(R)-2-(4-chloro-2-fluorophenyl)-2H-chromen-8-yl)piperidin-1-yl)methyl)-3-(((S)-oxetan-2-yl)methyl)-1H-benzo[d]imidazole-6-carboxylic acid was obtained.
MS m/z (ESI): 588.2 [M+1].
1H NMR (400 MHz, MeOD) δ 8.30 (s, 1H), 7.96 (dd, 1H), 7.66 (d, 1H), 7.40 (t, 1H), 7.25 (s, 1H), 7.16 (d, 1H), 7.04 (dd, 1H), 6.92 (dd, 1H), 6.83 (d, 1H), 6.68 (dd, 1H), 6.23-6.19 (m, 1H), 5.83 (dd, 1H), 5.27-5.20 (m, 1H), 4.85-4.80 (m, 1H), 4.74-4.62 (m, 2H), 4.48-4.41 (m, 1H), 4.05 (d, 1H), 3.95 (d, 1H), 3.12-3.05 (m, 1H), 2.94-2.77 (m, 3H), 2.55-2.46 (m, 1H), 2.39-2.25 (m, 2H), 1.82-1.73 (m, 2H), 1.66-1.50 (m, 2H).
Referring to the synthesis method of Example 48, the product methyl 2-((4-((R)-2-(4-chloro-2-fluorophenyl)-2H-chromen-8-yl)piperidin-1-yl)methyl)-3-(((S)-oxetan-2-yl)methyl)-3H-imidazolo[4,5-b]pyridine-5-carboxylate was obtained.
MS m/z (ESI): 603.2 [M+1].
Using 2-bromo-5-fluoro-4-nitropyridine N-oxide as the starting material and referring to Step 1 of intermediate Im-1, the product (S)-2-bromo-4-nitro-5-((oxetan-2-ylmethyl)amino)pyridine 1-oxide was obtained.
MS m/z (ESI): 303.9 [M+1]
At room temperature, (S)-2-bromo-4-nitro-5-((oxetan-2-ylmethyl)amino)pyridine 1-oxide (1 g, 3.28 mmol) and Zn powder (2.1 g, 32.8 mmol) were dissolved in methanol (25 mL), then acetic acid (985 mg, 16.4 mmol) was added dropwise. The reaction solution was heated to 60° C., stirred for 2 hours, cooled to room temperature, and filtered. The filtrate was adjusted to pH=7 with saturated sodium bicarbonate, and extracted with ethyl acetate (30 mL×3). The organic phase was dried over anhydrous sodium sulfate, filtered, and concentrated to dryness by rotary evaporation to obtain the title product (S)-6-bromo-N3-(oxetan-2-ylmethyl)pyridine-3,4-diamine (804 mg) with a yield of 95%.
MS m/z (ESI): 258.0 [M+1].
At room temperature, (S)-6-bromo-N3-(oxetan-2-ylmethyl)pyridine-3,4-diamine (500 mg, 1.94 mmol), RuPhos Pd-G3 (324.5 mg, 0.39 mmol), X-Phos (186 mg, 0.39 mmol), and Zn(CN)2 (458 mg, 3.9 mmol) were dissolved in NMP (15 mL), and the reaction system was purged with nitrogen gas three times. The reaction solution was heated to 130° C., stirred for 0.5 hours, cooled to room temperature, and filtered. The filtrate was extracted with ethyl acetate (30 mL×3). The organic phase was dried over anhydrous sodium sulfate, filtered, concentrated to dryness by rotary evaporation. The resulting residue was purified by silica gel column chromatography with petroleum ether and ethyl acetate as eluent system to obtain the title product (S)-4-amino-5-((oxetan-2-ylmethyl)amino)picolinonitrile (345 mg) with a yield of 87.1%.
MS m/z (ESI): 205.1 [M+1]
Using (S)-4-amino-5-(oxetan-2-ylmethyl)amino)picolinonitrile as the starting material and referring to Step 3 of intermediate Im-2, the product (S)-2-(chloromethyl)-3-(oxetan-2-ylmethyl)-3H-imidazolo[4,5-c]pyridine-6-carbonitrile was obtained.
MS m/z (ESI): 263.0 [M+1]
Using (S)-2-(chloromethyl)-3-(oxetan-2-ylmethyl)-3H-imidazolo[4,5-c]pyridine-6-carbonitrile and (R)-4-(2-(4-chloro-2-fluorophenyl)-2H-chromen-8-yl)piperidine as the starting materials, and referring to Step 6 of Example 48, the product 2-((4-(R)-2-(4-chloro-2-fluorophenyl)-2H-chromen-8-yl)piperidin-1-yl)methyl)-3-(((S) oxetan-2-yl)methyl)-3H-imidazolo[4,5-c]pyridine-6-carbonitrile was obtain.
MS m/z (ESI): 570.2 [M+1].
At room temperature, 2-((4-((R)-2-(4-chloro-2-fluorophenyl)-2H-chromen-8-yl)piperidin-1-yl)methyl)-3-(((S)-oxetan-2-yl)methyl)-3H-imidazolo[4,5-c]pyridine-6-carbonitrile (500 mg, 0.88 mmol) was dissolved in methanol (15 mL), sodium methoxide (95 mg, 1.76 mmol) was added, and stirred at room temperature for 24 hours. 20 mL of water was added, and the reaction solution was extracted with ethyl acetate (30 mL×3). The organic phase was dried over anhydrous sodium sulfate, filtered, and concentrated to dryness by rotary evaporation to obtain the title product methyl 2-((4-((R)-2-(4-chloro-2-fluorophenyl)-2H-chromen-8-yl)piperidin-1-yl)methyl)-3-(((S)-oxetan-2-yl)methyl)-3H-imidazolo[4,5-c]pyridine-6-carbimidate (450 mg) with a yield of 85%.
MS m/z (ESI): 602.2 [M+1].
Methyl 2-((4-((R)-2-(4-chloro-2-fluorophenyl)-2H-chromen-8-yl)piperidin-1-yl)methyl)-3-(((S)-oxetan-2-yl)methyl)-3H-imidazolo[4,5-c]pyridine-6-carbimidate (100 mg, 0.17 mmol) and 2-hydrazinyl-2-oxoacetamide (35 mg, 0.34 mmol) was dissolved in n-butanol (5 mL), and DIEA (66 mg, 0.51 mmol) was added. The reaction system was purged with nitrogen gas three times, and reacted at 120° C. under a nitrogen atmosphere for 16 hours. The reaction solution was cooled to room temperature, followed by the addition of 20 mL of water, and extracted with ethyl acetate (30 mL×3). The organic phase was dried over anhydrous sodium sulfate, filtered, concentrated to dryness by rotary evaporation. The resulting residue was purified by silica gel column chromatography with dichloromethane and methanol as eluent system to obtain the title product 5-(2-((4-((R)-2-(4-chloro-2-fluorophenyl)-2H-chromen-8-yl)piperidin-1-yl)methyl)-3-(((S)oxetan-2-yl)methyl)-3H-imidazolo[4,5-c]pyridin-6-yl)-4H-1,2,4-triazole-3-carboxamide (67 mg) with a yield of 60%.
MS m/z (ESI): 655.2 [M+1].
5-(2-((4-((R)-2-(4-Chloro-2-fluorophenyl)-2H-chromen-8-yl)piperidin-1-yl)methyl)-3-(((S)oxetan-2-yl)methyl)-3H-imidazolo[4,5-c]pyridin-6-yl)-4H-1,2,4-triazole-3-carboxamide (50 mg, 0.076 mmol) and DIEA (30 mg, 0.23 mmol) were dissolved in DCM, and TFAA (24 mg, 0.11 mmol) was added. The reaction solution was stirred for 10 minutes, followed by the addition of 50 mL of water, and extracted with ethyl acetate (10 mL×3). The organic phase was dried over anhydrous sodium sulfate, filtered, and concentrated to dryness by rotary evaporation. The resulting residue was purified by prep-HPLC to obtain the title product 2-((4-((R)-2-(4-Chloro-2-fluorophenyl)-2H-chromen-8-yl)piperidin-1-yl)methyl)-3-(((S)-oxetan-2-yl)methyl)-3H-imidazo[4,5-c]pyridin-6-yl)-4H-1,2,4-triazole-3-carbonitrile (12 mg) with a yield of 25%.
MS m/z (ESI): 637.2 [M+1].
2-((4-((R)-2-(4-Chloro-2-fluorophenyl)-2H-chromen-8-yl)piperidin-1-yl)methyl)-3-(((S)-oxetan-2-yl)methyl)-3H-imidazolo[4,5-c]pyridine-6-carbonitrile (50 mg, 0.088 mmol), DIEA (57 mg, 0.44 mmol), and hydroxylamine hydrochloride (12 mg, 0.18 mmol) were dissolved in ethanol (5 mL) and stirred at 90° C. for 2 hours. The reaction solution was filtered, and the solid was dried to obtain the title product (Z)-2-((4-(R)-2-(4-chloro-2-fluorophenyl)-2H-chromen-8-yl)piperidin-1-yl)methyl)-N′-hydroxy-3-(((S)-oxetan-2-yl)methyl)-3H-imidazolo[4,5-c]pyridine-6-carboximidamide (21.2 mg) with a yield of 40%.
MS m/z (ESI): 603.2 [M+1].
(Z)-2-((4-((R)-2-(4-Chloro-2-fluorophenyl)-2H-chromen-8-yl)piperidin-1-yl)methyl)-N′-hydroxy-3-(((S)-oxetan-2-yl)methyl)-3H-imidazolo[4,5-c]pyridine-6-carboximidamide (50 mg, 0.083 mmol), and trifluoroacetic anhydride TFAA (87 mg, 0.42 mmol) were dissolved in THF (5 mL) and stirred at 60° C. for 2 hours. 10 mL of saturated sodium bicarbonate solution was added, and the reaction solution was extracted with ethyl acetate (10 mL×3). The organic phase was dried over anhydrous sodium sulfate, filtered, concentrated to dryness by rotary evaporation. The resulting residue was purified by silica gel column chromatography with dichloromethane and methanol as eluent system to obtain the title product (3-(2-((4-((R)-2-(4-chloro-2-fluorophenyl)-2H-chromen-8-yl)piperidin-1-yl)methyl)-3-(((S)-oxetan-2-yl)methyl-3H-imidazolo[4,5-c]pyridin-6-yl)-5-(trifluoromethyl)-1,2,4-oxadiazole (41.3 mg) with a yield of 73%.
MS m/z (ESI): 681.2 [M+1].
(3-(2-((4-(((R)-2-(4-Chloro-2-fluorophenyl)-2H-chromen-8-yl)piperidin-1-yl)methyl)-3-(((S)-oxetan-2-yl)methyl-3H-imidazolo[4,5-c]pyridin-6-yl)-5-(trifluoromethyl)-1,2,4-oxadiazole (50 mg, 0.073 mmol), and 2 drops of hydrazine hydrate were dissolved in DMF (2 mL) and stirred at room temperature for 2 hours. The reaction solution was filtered, and concentrated to dryness by rotary evaporation. The resulting residue was purified by prep-HPLC to obtain the title product 2-((4-((R)-2-(4-chloro-2-fluorophenyl)-2H-chromen-8-yl)piperidin-1-yl)methyl)-3-(((S)-oxetan-2-yl)methyl)-6-(5-(trifluoromethyl)-4H-1,2,4-triazole-3-yl)-3H-imidazolo[4,5-c]pyridine (21 mg) with a yield of 42%.
MS m/z (ESI): 680.2 [M+1].
(Z)-2-((4-((R)-2-(4-Chloro-2-fluorophenyl)-2H-chromen-8-yl)piperidin-1-yl)methyl)-N′-hydroxy-3-(((S)-oxetan-2-yl)methyl)-3H-imidazolo[4,5-c]pyridine-6-carboximidamide (50 mg, 0.083 mmol), and CDI (27 mg, 0.166 mmol) were dissolved in DMF (2 mL), and stirred at 80° C. for 2 hours. The reaction solution was filtered, and concentrated to dryness by rotary evaporation. The resulting residue was purified by prep-HPLC to obtain the title product 3-(2-((4-(R)-2-(4-chloro-2-fluorophenyl)-2H-chromen-8-yl)piperidin-1-yl)methyl)-3-(((S)oxetan-2-yl)methyl)-3H-imidazolo[4,5-c]pyridin-6-yl)-1,2,4-oxadiazol-5(4H)-one (20.9 mg) with a yield of 40%.
MS m/z (ESI): 629.2 [M+1].
2-((4-((R)-2-(4-Cyano-2-fluorophenyl)-2H-chromen-8-yl)piperidin-1-yl)methyl)-3-(((S)-oxetan-2-yl)methyl)-3H-imidazolo[4,5-b]pyridine-5-carboxylic acid (100 mg, 172.52 μmol) and ethanol (5 mL) were added to a 25 mL flask, and potassium hydroxide (96.79 mg, 1.73 mmol) was dissolved in water (1 mL) and added dropwise to the reaction solution at 25° C. Then the reaction solution was reacted at 80° C. for 2 hours. The reaction was stopped, cooled to 25° C., the reaction solution was quenched with formic acid (0.1 mL), followed by the addition of water (2 mL), and extracted with dichloromethane (2 mL×3). The organic phase was washed with saturated sodium chloride solution (2 mL), dried over anhydrous sodium sulfate, filtered, and concentrated to dryness by rotary evaporation. The resulting residue was purified by prep-HPLC to obtain the title product 2-((4-((R)-2-(4-carbamoyl-2-fluorophenyl)-2H-chromen-8-yl)piperidin-1-yl)methyl)-3-(((S)-oxetan-2-yl)methyl)-3H-imidazolo[4,5-b]pyridine-5-carboxylic acid (40 mg), with a yield of 38.79%.
MS m/z (ESI): 598.2 [M+1].
2-((4-((R)-2-(4-Cyano-2-fluorophenyl)-2H-chromen-8-yl)piperidin-1-yl)methyl)-1-(((S)-oxetan-2-yl)methyl)-1H-benzo[d]imidazole-6-carboxylic acid (100 mg, 172.82 mol) and ethanol (5 mL) were added to a 25 mL flask, and potassium hydroxide (96.96 mg, 1.73 mmol) was dissolved in water (1 mL) and added dropwise to the reaction solution at 25° C. Then the reaction solution was reacted at 80° C. for 2 hours. The reaction was stopped, cooled to 25° C., the reaction solution was quenched with formic acid (0.1 mL), followed by the addition of water (2 mL), and extracted with dichloromethane (2 mL×3). The organic phase was washed with saturated sodium chloride solution (2 mL), dried over anhydrous sodium sulfate, filtered, and concentrated to dryness by rotary evaporation. The resulting residue was purified by prep-HPLC to obtain the title product 2-((4-((R)-2-(4-carbamoyl-2-fluorophenyl)-2H-chromen-8-yl)piperidin-1-yl)methyl)-1-(((S)-oxetan-2-yl)methyl)-1H-benzo[d]imidazole-6-carboxylic acid (35 mg) with a yield of 33.94%.
MS m/z (ESI): 597.2 [M+1].
3-Fluoro-4-formylbenzoic acid (5 g, 29.74 mmol) was dissolved in N,N-dimethylformamide (50 mL), then dimethanamine (1.34 g, 29.74 mmol), HATU (11.30 g, 29.74 mmol), and DIEA (3.84 g, 29.74 mmol) were added to the reaction. The reaction was stirred at 25° C. for 8 hours. The reaction was stopped, water (50 mL) was added, and the reaction solution was extracted with dichloromethane (30 mL×3). The organic phase was washed with saturated sodium chloride solution (30 mL), dried over anhydrous sodium sulfate, filtered, and concentrated to dryness by rotary evaporation. The resulting residue was purified by silica gel column chromatography with petroleum ether and ethyl acetate as eluent system to obtain the title product 3-fluoro-4-formyl-N,N-dimethylbenzamide (4.5 g) with a yield of 77.52%.
MS m/z (ESI): 196.0 [M+1]
Using 3-fluoro-4-formyl-N,N-dimethylbenzamide as the starting material and referring to Example 48, the target product 2-((4-((R)-2-(4-(dimethylcarbamoyl)-2-fluorophenyl)-2H-chromen-8-yl)piperidin-1-yl)methyl)-1-(((S)-oxetan-2-yl)methyl)-1H-benzo[d]imidazole-6-carboxylic acid was obtained.
MS m/z (ESI): 625.2 [M+1].
Tert-butyl (R)-4-(2-(4-cyano-2-fluorophenyl)-2H-chromen-8-yl)piperidine-1-carboxylate (1 g, 2.30 mmol) and tetrahydrofuran (20 mL) were added to a 100 mL flask. Cyclopropyl magnesium bromide (2.3 mL, 1M, 2.30 mmol) was added at 0° C., and the reaction solution was reacted at 80° C. for 12 hours, cooled to 0° C., then 2N hydrochloric acid (2 mL) was added, the reaction solution was reacted at 0° C. for 2 hours. Then the reaction solution was neutralized with a saturated sodium bicarbonate solution, and extracted with ethyl acetate (20 mL×3). The organic phase was washed with saturated sodium chloride solution (20 mL), dried over anhydrous sodium sulfate, filtered, and concentrated to dryness by rotary evaporation. The resulting residue was purified by silica gel column chromatography with petroleum ether and ethyl acetate as eluent system to obtain the title product tert-butyl (R)-4-(2-(4-(cyclopropylcarbonyl)-2-fluorophenyl)-2H-chromen-8-yl)piperidine-1-carboxylate (0.6 g) with a yield of 54.59%.
MS m/z (ESI): 478.2 [M+1]
Using tert-butyl (R)-4-(2-(4-(cyclopropylcarbonyl)-2-fluorophenyl)-2H-chromen-8-yl)piperidine-1-carboxylate as the starting material, and referring to Step 5 to Step 7 of Example 48, the target product 2-((4-((R)-2-(4-(cyclopropylcarbonyl)-2-fluorophenyl)-2H-chromen-8-yl)piperidin-1-yl)methyl)-1-(((S)-oxetan-2-yl)methyl)-1H-benzo[d]imidazole-6-carboxylic acid was obtain.
MS m/z (ESI): 622.2 [M+1].
The present invention is further illustrated below in combination with the following test examples, which are not intended to limit the scope of the present invention.
I. Determination of the Ability of the Compound of the Present Invention to Stimulate Human GLP1 Receptor Stable Transgenic Cell Lines to Produce cAMP
The purpose of this test example is to determine the ability of the compound to activate the human GLP-1 receptor on the cell surface. The EC50 that stimulates AMP-production after agonism characterizes the compound's ability to activate the human GLP-1 receptor.
Microplate reader (BioTek Synergy H1);
Pipette (Eppendorf & Rainin).
DMEM/F12 medium was purchased from Gibco, and the article number was 11330032;
Casein was purchased from Sigma, and the article number was C3400;
384-well plate was purchased from Sigma, and the article number was CLS4514;
IBMX was purchased from Sigma, and the article number was 17018;
Cisbio cAMP—Gs Dynamic kit was purchased from Cisbio, and the article number was 62AM4PEC.
The frozen human GLP1 receptor stable transgenic cell line CHO-K1/GLP-1R/CRE-luc was taken from the liquid nitrogen tank, quickly thawed in a 37° C. water bath, resuspended with DMEM/F12 medium, centrifuged, and washed once. The cells were resuspended with the experimental buffer, namely DMEM/F12 medium containing 0.1% casein, and the experimental buffer was used to adjust the cell density. The cells were spread on spread on a 384-well plate at a density of 2500 cells/5 μL/well, and then to each well was added 2.5 μL of buffer-prepared IBMX working solution with a final concentration of IBMX of 0.5 mM, and 2.5 μL of the compound sample with gradient dilution (starting at 1000 nM, 3-fold dilution, 11 concentrations). The plate was centrifuged at 1000 rpm for 1 minute, shaken for 30 seconds to mix well, and incubated at room temperature for 30 minutes. Detection was performed using the Cisbio cAMP—Gs Dynamic kit. cAMP-d2 and Anti-cAMP-Eu3+-Cryptate were diluted 20-fold with cAMP Lysis & Detection Buffer, respectively, and mixed well. To each well was added 5 μL diluted cAMP-d2 solution, and then added 5 μL diluted Anti-cAMP-Eu3+-Cryptate solution. The plate was shaken for 30 seconds, and incubated at room temperature for 1 hour in the dark. The signal reading of HTRF was performed using the Biotek Synergy H1 microplate reader with an excitation wavelength of 320 nm and emission wavelengths of 620 nm and 665 nm.
The signal ratio (665 nm/620 nm*10,000) was calculated, and the signal ratio and sample concentration were nonlinearly fitted using a four-parameter equation in GraphPad Prism 6 to obtain the EC50 value.
Through the above protocol, it is concluded that the example compound of the present invention shows good biological activity in the experiment of stimulating the human GLP1 receptor stable transgenic cell lines to produce cAMP.
To evaluate the effect of single administration of the compound of the present invention on blood glucose changes in the intraperitoneal glucose tolerance (ipGTT) experiment in GLP-1R humanized C57BL/6 mice.
C57BL/6_hGLP-1R, male, 5-8 weeks; Ultra-clean workbench; Electronic balance; Vitality type blood glucose meter; Glucose.
3.1 On the day before the experiment, the animals were randomly divided according to their weight, with 5 animals per group. All animals were deprived of food overnight and fasted for more than 16 hours from the time of administration.
3.2 0.2 g/mL glucose solution was prepared with pure water and filtered by 0.22 m filter membrane for use.
3.3 On the testing day, the blood glucose value of each animal was measured successively by tail clipping method before administration, which was recorded as Baseline value;
Blood glucose test method: the mouse was placed in the immobilizer, the tail tip was disinfected with an alcohol cotton ball, then a little tail tip was cut off with scissors, the first drop of blood was discarded, and the second drop of blood was dropped onto the prepared blood glucose test strip to detect the blood glucose value;
3.4 The animals were administered according to animal weight, and the administration time was record for each animal. After 1 hour of administration, the blood glucose value of each animal was measured sequentially, and recorded as the 0 minute blood glucose value;
3.5 Subsequently, according to the weight of the day, the aminals were immediately injected with pure water or glucose solution into the abdominal cavity, with a volume of 10 mL/kg and a glucose dose of 2 g/kg;
3.6 The blood glucose values of each mouse were measured, and the time and data were recorded after 15, 30, 60, 90, and 120 minutes of pure water or glucose solution injection;
3.7 After the test, all animals resumed feeding.
3.8 Data processing:
The blood glucose (BG)-time curve was drawn, and the area under the blood glucose-time curve was calculated. The calculation formula is as follows:
AUC (mmol/L·hr)=(BG0+BG15)×0.25/2+(BG15+BG30)×0.25/2+(BG30+BG60)×0.5/2+(BG60+BG90)×0.5/2+(BG90+BG120)×0.5/2.
Note: BG0, BG15, BG30, BG60, BG90, and BG120 represent blood glucose values before glucose administration (0 min) and 15, 30, 60, 90, and 120 min after glucose administration, respectively.
The blood glucose decline rate of AUC at each time point was calculated according to the average blood glucose value and AUC of blood glucose at each time point. The calculation formula is: Blood glucose decline rate=(blood glucose in the administration group/AUC−blood glucose in the model control group/AUC)/blood glucose in the model control group/AUC×100%.
According to the above experimental results, it can be seen that the example compounds of the present invention can effectively reduce blood sugar in mice.
III. The Effect of Long-Term Administration of the Compound of the Present Invention on the Body Weight and Ingestion of GLP-1R Humanized Mice Fed with High-Fat Diet
The purpose of this test is to evaluate the effects of long-term administration of the compound on the body weight and ingestion of GLP-1R humanized C57BL/6 mice fed with high-fat diet.
C57BL/6_hGLP-1R, male, 5-8 weeks; 60% high-fat diet (HFD); Ultra-clean workbench; Electronic balance.
3.1 On the day of feeding with high-fat diet, C57BL/6 mice were randomly divided into two groups according to their weight. The first group was Blank, with 7 mice fed with normal control diet, while the remaining animals were in the modeling group, fed with high-fat diet, and continued until the end of the experiment.
3.2 At the 8th week of HFD feeding, the modeling group animals were randomly divided with 7 animals per group according to their weight. The first group was the Vehicle group (Vehicle: 0.5% CMC Na+1% Tween 80), which was given vehicle; The remaining group was the administration group; Administration regimen: Oral administration of the corresponding compound, administration cycle was 14 days, once a day for 14 days, with an administration dose of 10 mg/kg and an administration volume of 10 mL/kg. The Blank group continued to be fed with normal diet without any administration operation.
3.3 The day of administration was defined as Day 0.
3.4 During each administration, animals were weighed and data was recorded. Oral administration is performed according to body weight, with an administration volume of 10 mL/kg.
3.5 Starting from Day 0 of the experiment, the food intake of each group of mice was measured once every three days. Specifically, the feed was changed after each weighing and administration, and the added and remaining amounts were recorded.
3.6 On the end day of Day 14, all mice were euthanized sequentially according to grouping order, and the livers were dissected and weighed.
The weight and weight change rate of mice after administration were summarize and statistically analyzed. Weight change rate calculation: (BWt−BW0)/BW0×100%. BWt represents the weight of the mice on Day t of the experiment, and BW0 represents the weight of the mice on Day 0 of the experiment.
Calculation of food intake: (added amount (g)−remaining amount (g))/number of animals per cage, cumulative food intake is the sum of daily food intake of each animal during the administration period.
Experimental data were analyzed using GraphPad Prism software. The t-test method was used for comparison between the two groups. The one-way ANOVA method was used for comparisons between three or more groups.
According to the above experimental results, it can be seen that long-term administration of the example compounds of the present invention has a good weight reduction effect on GLP-1R humanized C57BL/6 mice fed with high-fat diet.
SD rats were used as test animals. The pharmacokinetic behavior of the following example compounds was studied in the plasma of rats administered orally at a dose of 50 mg/kg.
Vehicle formula: 0.5% CMC-Na (1% Tween 80);
Compounds of the examples of the present invention are self-made.
Three SD rats per group, male.
Three SD rats per group, male; p.o. after fasting overnight, respectively, with a dose of 5 mg/kg, an administration volume of 10 mL/kg.
Before and after administration, 0.2 mL of blood was collected from the jugular vein at 0, 0.25, 0.5, 1, 2, 4, 6, 8 and 24 hours, placed in EDTA-K2 tubes, centrifuged at 6000 rpm at 4° C. for 6 min to separate the plasma. The plasma samples were stored at −80° C. The mouse was fed 4 hours after the administration.
The main pharmacokinetic parameters were calculated using WinNonlin 8.2.
It can be seen from the results of rat pharmacokinetic experiments in the table that the compounds of the examples of the present invention show good metabolic properties at a dose of 50 mg/kg, and both the exposure AUC and the maximum plasma concentration Cmax perform well.
| Number | Date | Country | Kind |
|---|---|---|---|
| 202110892791.3 | Aug 2021 | CN | national |
| 202111322097.4 | Nov 2021 | CN | national |
| 202210041958.X | Jan 2022 | CN | national |
| 202210540040.X | May 2022 | CN | national |
| Filing Document | Filing Date | Country | Kind |
|---|---|---|---|
| PCT/CN2022/110017 | 8/3/2022 | WO |
