申请人:Council of Scientific & Industrial Research
公开号:US20140243537A1
公开(公告)日:2014-08-28
The present invention discloses high yielding enantioselective process for synthesis of Oseltamivir from readily available starting material, cis-1,4-butene diol. The process features incorporation of chirality using sharpless asymmetric epoxidation (AE) and diastereoselective Barbier allylation and construction of cyclohexene carboxylic acid ester core through a ring closing metathesis (RCM) reaction. Further also disclosed herein is synthesis of (−)-methyl 3-epi-shikimate.
本发明揭示了一种高产高对映选择性的奥司他韦合成工艺,从易得的起始物质顺式-1,4-丁二醇出发。该工艺采用Sharpless不对称环氧化(AE)和立体选择性的Barbier烯丙基化,通过环内酯交换反应(RCM)构建环己烯羧酸酯核心以引入手性。此外,还揭示了(−)-甲基3-epi-香椿糖酸的合成。