作者:Gangavaram V.M. Sharma、Vennampalli Manohar
DOI:10.1016/j.tetasy.2012.02.009
日期:2012.2
The formal total synthesis of the cytotoxic 14-membered macrolides, aspergillides A and B is described. A combination of a chiron approach and an asymmetric synthesis is adopted for the synthesis of the target macrolides. The required 2,6-syn and 2,6-anti tetrahydropyrans were constructed via a tandem Sharpless asymmetric epoxidation and 6-exo cyclization on δ-hydroxy allylic alcohols, as the key steps
描述了细胞毒性的14元大环内酯类,曲霉内酯A和B的正式全合成。将Chiron方法和不对称合成的组合用于目标大环内酯的合成。通过串联的Sharpless不对称环氧化和在δ-羟基烯丙醇上的6- exo环化反应来构建所需的2,6- syn和2,6-抗四氢吡喃,这是关键步骤。必需的手性合成子是由1-抗坏血酸制备的。