Kedarcidin Chromophore: Synthesis of Its Proposed Structure and Evidence for a Stereochemical Revision
作者:Feng Ren、Philip C. Hogan、Alan J. Anderson、Andrew G. Myers
DOI:10.1021/ja071205b
日期:2007.5.1
enantioselective synthesis of the proposed structure of kedarcidin chromophore (1) is described. The route is 24 steps in the longest linear sequence (beginning with the commercial reagent 2,3-O-isopropylidene-d-erythronolactone) with an average yield of 75% per step (overall yield: 0.1%). Our 1H NMR data for 1 do not coincide with the data reported for kedarcidin chromophore. We have re-analyzed the original
描述了所提出的卡达西丁发色团 (1) 结构的会聚、对映选择性合成。该路线是最长线性序列中的 24 个步骤(从商业试剂 2,3-O-异丙叉基-d-赤藓糖内酯开始),每步平均产率为 75%(总产率:0.1%)。我们的 1 的 1 H NMR 数据与卡达西丁发色团报告的数据不一致。我们重新分析了原始数据,并在此提出对 C10 位点(L-mycarose 碳水化合物残基与发色团核心的连接位点)进行立体化学修正(结构 2)。