skeleton was assembled by means of Julia-Kocienski (C16-C17) and Horner-Wadsworth-Emmons (C21-C22) olefinations. Still-Gennari olefination was used for the C2-C3 ring closure. The key step of the synthesis was a regioselective C16-C17 matched Sharpless asymmetric epoxidation.
通过新的合成途径获得了微管稳定的
抗肿瘤药劳力美利德(1)。碳骨架是通过Julia-Kocienski(C16-C17)和Horner-Wadsworth-Emmons(C21-C22)烯烃组装而成的。Still-Gennari烯烃化反应用于C2-C3闭环。合成的关键步骤是区域选择性的C16-C17匹配的Sharpless不对称环氧化。