PROCESS FOR PREPARATION OF 4-FLUORO-alpha-[2METHYL-L-OXOPROPYL]-gamma-OXO-N-beta-DIPHENYLBENZENE BUTANE AMIDE
申请人:Srivatsavayi Jagapathi Raju
公开号:US20130184493A1
公开(公告)日:2013-07-18
A process for preparation of 4-fluoro-α-[2-methyl-1-oxopropyl]-γ-oxo-N-β-diphenylbenzene butane amide also known as a diketone intermediate of atorvastatin, completely devoid of impurities 3,4-difluoro-α-[2-methyl-1-oxopropyl]-γ-oxo-n-β-diphenylbenzene butane amide; methyl, 2-2[-(4-fluorophenyl)-2-oxo-1-phenylethyl)]}-4-methyl-3-oxo pentanoate; 1,4-bis(4-fluorophenyl)-2,3-diphenylbutane-1,4-dione, 1-(4-fluorophenyl)-2-phenyl ethanone; 1-(4-fluorophenyl)-2-phenyl ethanone and containing about 0.05% or less of 2-methyl-1-oxopropyl]-γ-oxo-N-β-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.
一种制备阿托伐他汀二酮中间体4-氟-α-[2-甲基-1-氧代丙基]-γ-氧代-N-β-二苯基苯丁酰丁酰胺的工艺,完全不含杂质3,4-二氟-α-[2-甲基-1-氧代丙基]-γ-氧代-N-β-二苯基苯丁酰丁酰胺;甲基,2-2[-(4-氟苯基)-2-氧代-1-苯基乙基)]}-4-甲基-3-氧代戊酸酯;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-氧代丙基]-γ-氧代-N-β-二苯基苯丁酰丁酰胺。在该过程中,通过在Friedel-Crafts酰化过程中保持温度为-25℃至50℃,在溶剂存在下进行公告II的原位卤代化和从公式III的化合物中在碱的存在下进行公式IV的亲核取代,获得公式1的所述二酮中间体。