申请人:Pathi Srinivas Laxminarayan
公开号:US20100160643A1
公开(公告)日:2010-06-24
A process for the preparation of trityl olmesartan comprising (a) condensing 4-(1-hydroxy-1-methylethyl)-2-propyl-imidazol-5-carboxylic acid alkyl ester with trityl biphenyl bromide in the presence of a polar aprotic solvent and a base selected from the group consisting of alkali metal carbonates, alkali metal hydroxides, alkali metal alkoxides, and tertiary amines to obtain a compound of formula V,
b) deesterifying the compound of formula (V) with a base; and c) reacting the product of step (b) with 4-halomethyl-5-methyl-2-oxo-1,3-dioxolene of formula (IV),
wherein X is halogen selected from F or Cl or Br or I, to obtain trityl olmesartan medoxomil of formula. The trityl olmesartan medoxomil may be deprotected to produce olmesartan medoxomil.
制备三苯甲酰奥美沙坦的过程包括:(a)在极性无水溶剂和碱金属碳酸盐、碱金属氢氧化物、碱金属烷氧基和三级胺所组成的碱中的一种存在下,将4-(1-羟基-1-甲基乙基)-2-丙基咪唑-5-羧酸烷基酯与三苯甲酰联苯溴化物缩合,以获得化合物V的化合物;(b)用碱脱酯化式(V)的化合物;和(c)将步骤(b)的产物与式(IV)的4-卤甲基-5-甲基-2-氧代-1,3-二氧杂环戊烷中的卤素(X)选择自F、Cl、Br或I)反应,以获得三苯甲酰奥美沙坦甲氧苯酰基的化合物。三苯甲酰奥美沙坦甲氧苯酰基可以去保护制得奥美沙坦甲氧苯酰基。