[EN] A PROCESS FOR PREPARATION OF 4-FLUORO-a-[2-METHYL-L-OXOPROPYL]-?-OXO-N-ß-DIPHENYLBENZENE BUTANE AMIDE<br/>[FR] PROCÉDÉ DE PRÉPARATION DE 4-FLUORO-?-[2-MÉTHYL-1-OXOPROPYL]-G-OXO-N- ?-DIPHÉNYLBENZÈNE-BUTANE-AMIDE
申请人:VIJAYASRI ORGANICS LTD
公开号:WO2012143933A1
公开(公告)日:2012-10-26
A process for preparation of 4-fluoro-alpha-[2-methyl-l -oxopropyl]-gama-oxo-N- beta-diphenylbenzene butane amide also known as a diketone intermediate of atorvastatin, completely devoid of impurities 3,4-difluoro-alpha-[2-methyl-l-oxopropyl]-gama-oxo-n-beta-diphenylbenzene butane amide; methyl, 2 -2[-(4-fluorophenyl)-2-oxo- 1 -phenyl ethyl)] } -4-methyl-3-oxo pentanoate; 1,4-bis(4-fluorophenyl)-2,3-diphenylbutane- 1,4-dione, 1 -(4-fluorophenyl)-2-phenyl ethanone; l-(4-fluorophenyl)-2-phenyl ethanone and containing about 0.05% or less of 2-methyl- l-oxopropyl]-gama-oxo-N-beta- diphenylbenzene butane amide. In that process the said diketone intermediate of formula 1 is obtained by maintaining temperature -25° C to 50° C during Friedel-Crafts acylation, in situ halogenation of formula II in presence of a solvent and nucleophilic substitution from a compound of formula III with formula IV in presence of a base.
一种制备4-氟-α-[2-甲基-1-氧丙基]-γ-羟基-N-β-二苯基苯丁酰胺的过程,也被称为阿托伐他汀的二酮中间体,完全不含杂质3,4-二氟-α-[2-甲基-1-氧丙基]-γ-羟基-N-β-二苯基苯丁酰胺;2--2-[(4-氟苯基)-2-氧代-1-苯基乙基)]}-4-甲基-3-氧代戊酸甲酯;1,4-双(4-氟苯基)-2,3-二苯基丁烷-1,4-二酮,1-(4-氟苯基)-2-苯基乙酮;1-(4-氟苯基)-2-苯基乙酮,含有约0.05%或更少的2-甲基-1-氧丙基]-γ-羟基-N-β-二苯基苯丁酰胺。在该过程中,通过在Friedel-Crafts酰化反应期间保持温度在-25°C至50°C,利用溶剂和在碱的存在下,通过在位卤代反应从公式III的化合物与公式IV进行亲核取代来获得公式1的所述二酮中间体。