Stereoselective synthesis of (1′S,3R,4R)-4-acetoxy-3-(2′-fluoro-1′-trimethylsilyloxyethyl)-2-azetidinone
作者:Ivan Plantan、Michel Stephan、Uroš Urleb、Barbara Mohar
DOI:10.1016/j.tetlet.2009.03.111
日期:2009.6
4R)-4-acetoxy-3-(2′-fluoro-1′-trimethylsilyloxyethyl)-2-azetidinone as a new fluorine-containing intermediate towards β-lactams, is described. The synthetic key step relies upon the dynamic kinetic resolution (DKR) of ethyl 2-benzamidomethyl-4-fluoro-3-oxo-butanoate via asymmetric transfer hydrogenation catalyzed by [Ru(η6-arene)(S,S)-R2NSO2DPEN].
立体选择性合成(1 'S,3 R,4 R)-4-乙酰氧基-3-(2'-氟-1'-三甲基甲硅烷基氧基乙基)-2-氮杂环丁酮作为对β-内酰胺的新的含氟中间体描述。合成关键步骤依赖于2-苯甲酰氨基-4-氟-3-氧代-丁酸乙酯的经由通过的[Ru(η催化的不对称转移氢化的动态动力学拆分(DKR)6 -arene)(小号,小号)-R 2 NSO 2 DPEN]。