α‐ and β‐Lipomycin: Total Syntheses by Sequential Stille Couplings and Assignment of the Absolute Configuration of All Stereogenic Centers
作者:Max L. Hofferberth、Reinhard Brückner
DOI:10.1002/anie.201402255
日期:2014.7.7
structures of α‐lipomycin and its aglycon β‐lipomycin except for the configurations of their side‐chain stereocenters. We synthesized all relevant β‐lipomycin candidates: the (12R,13S) isomer has the same specific rotational value as the natural product. By the same criterion the (12R,13S)‐configured D‐digitoxide is identical to α‐lipomycin. We double‐checked our assignments by degrading α‐ and β‐lipomycin
40年前,光谱学,衍生化和降解显示了α-脂霉素及其糖苷配基β-脂霉素的结构,除了其侧链立体中心的构型。我们合成了所有相关的β-脂肪霉素候选物:(12 R,13 S)异构体具有与天然产物相同的比旋转值。用相同的准则(12 - [R,13小号)构型d - digitoxide是相同的α-lipomycin。我们通过将α-和β-lipomycin降解为二酯33和34并合成证明了它们的3D结构,仔细检查了我们的任务 。