作者:Marta Amador、Xavier Ariza、Jordi Garcia、Jordi Ortiz
DOI:10.1021/jo048705x
日期:2004.11.1
A concise approach to (−)-phaseolinic acid starting from commercially available (S)-oct-1-yn-3-ol is disclosed. The key steps are a ring-closing metathesis reaction to prepare a C2-symmetrical allylic diol and its desymmetrization to a γ-butyrolactone by using an Ireland−Claisen rearrangement. The 2S,3S,4S configuration of the levogyre natural product has been confirmed.
公开了从可商购获得的(S)-辛-1-炔-3-醇开始的(-)-菜豆酸的简洁方法。关键步骤是制备C 2对称的烯丙基二醇的闭环复分解反应,并通过使用Ireland-Claisen重排将其脱对称为γ-丁内酯。已经证实左旋gyr天然产物的2 S,3 S,4 S构型。