Process for the preparation of (S)-2-amino-5-cyclopropyl-4,4-difluoropentanoic acid and alkyl esters and acid salts thereof
申请人:ViroBay, Inc.
公开号:US08324417B2
公开(公告)日:2012-12-04
The present invention relates to a process for the preparation of alkyl esters of (S)-2-amino-5-cyclopropyl-4,4-difluoropentanoic acid, which are intermediates useful in the synthesis of (S)—N-(1-cyanocyclopropyl)-5-cyclopropyl-4,4-difluoro-2-((S)-2,2,2-trifluoro-1-(4-fluorophenyl)ethylamino)pentanamide and related compounds, which are compounds that are cysteine protease inhibitors.
本发明涉及一种制备(S)-2-氨基-5-环丙基-4,4-二氟戊酸烷基酯的过程,这些中间体在合成(S)-N-(1-氰基环丙基)-5-环丙基-4,4-二氟-2-((S)-2,2,2-三氟-1-(4-氟苯基)乙基氨基)戊酰胺及其相关化合物中有用,这些化合物是半胱氨酸蛋白酶抑制剂。