申请人:Reddy Reguri Buchi
公开号:US20090286990A1
公开(公告)日:2009-11-19
A process for preparing irbesartan comprises pentanoylation of cycloleucine in the presence of sodium hydroxide to form n-pentanoyl cycloleucine, condensing this product with 2-(4-aminomethyl phenyl) benzonitrile using dicyclohexyl carbodiimide and 1-hydroxy benzotriazole as a catalyst to form the 4-(&quest-N-pentanoyl amino) cyclopentamido methyl-2′-cyano biphenyl compound, and then cyclizing using trifluoroacetic acid in the presence of an aromatic solvent to form cyano irbesartan. Cyano irbesartan is converted to irbesartan by reaction with tributyltin chloride and sodium azide in the presence of an aromatic solvent.
制备厄贝沙坦的过程包括在氢氧化钠存在下,将环亮氨酸进行戊酰化反应以形成N-戊酰基环亮氨酸,然后使用二环己基碳二亚胺和1-羟基苯并三唑作为催化剂,将该产物与2-(4-氨甲基苯基)苯甲腈缩合以形成4-(?-N-戊酰基氨基)环戊酰亚甲基-2'-氰基联苯化合物,然后在芳香溶剂存在下使用三氟乙酸进行环化反应以形成氰基厄贝沙坦。在芳香溶剂存在下,将氰基厄贝沙坦通过与三丁基锡氯化物和氮化钠反应将其转化为厄贝沙坦。