An Efficient Route to 4-Aryl-5-pyrimidinylimidazoles via Sequential Functionalization of 2,4-Dichloropyrimidine
摘要:
Starting from 2,4-dichloropyrimidine, a concise synthetic route to medicinally important 4-aryl-5-pyrimidinylimidazoles is described. Sequential substitution of the 4- and 2-chloro groups using a regioselective Sonogashira coupling, followed by nucleophilic substitution, led to pyrimidinylalkyne derivatives, which were then oxidized to their corresponding 1,2-diketones. These 1,2-diketones, on cyclocondensation with ammonium acetate and an aldehyde, furnished the desired pyrimidinyl imidazoles in good overall yields.
An Efficient Route to 4-Aryl-5-pyrimidinylimidazoles via Sequential Functionalization of 2,4-Dichloropyrimidine
摘要:
Starting from 2,4-dichloropyrimidine, a concise synthetic route to medicinally important 4-aryl-5-pyrimidinylimidazoles is described. Sequential substitution of the 4- and 2-chloro groups using a regioselective Sonogashira coupling, followed by nucleophilic substitution, led to pyrimidinylalkyne derivatives, which were then oxidized to their corresponding 1,2-diketones. These 1,2-diketones, on cyclocondensation with ammonium acetate and an aldehyde, furnished the desired pyrimidinyl imidazoles in good overall yields.
Synthesis of 4/5-pyrimidinylimidazoles via sequential functionalization of 2,4-dichloropyrimidine
申请人:Deng Xiaohu
公开号:US20070027319A1
公开(公告)日:2007-02-01
This invention relates to methods of making pyrimidinyl-substituted imidazole compounds by sequential substitution of the 4- and 2-chloro groups of 2,4-dichloropyrimidine, nucleophilic substitution to form pyrimidinylalkyne derivatives, oxidation to the corresponding 1,2-diketones, and cyclocondensation reactions.
SYNTHESIS OF 4/5-PYRIMIDINYLIMIDAZOLES VIA SEQUENTIAL FUNCTIONALIZATION OF 2,4-DICHLOROPYRIMIDINE
申请人:DENG Xiaohu
公开号:US20100274015A1
公开(公告)日:2010-10-28
This invention relates to methods of making pyrimidinyl-substituted imidazole compounds by sequential substitution of the 4- and 2-chloro groups of 2,4-dichloropyrimidine, nucleophilic substitution to form pyrimidinylalkyne derivatives, oxidation to the corresponding 1,2-diketones, and cyclocondensation reactions.