A synthesis-enabled relative stereochemical assignment of the C1–C28 region of hemicalide
作者:Bing Yuan Han、Nelson Y. S. Lam、Callum I. MacGregor、Jonathan M. Goodman、Ian Paterson
DOI:10.1039/c8cc00933c
日期:——
Through synthesising both candidate diastereomers of a model C1–C28 fragment of the potent cytotoxic marine polyketide hemicalide, an assignment of the relative configuration between the C1–C15 and C16–C26 regions has been achieved. By detailed NMR comparisons with the natural product, the relative stereochemistry between these two 1,6-related stereoclusters is elucidated as 13,18-syn rather than the
通过合成有效的细胞毒性海洋聚酮化合物hemicalide的模型C1-C28片段的两个候选非对映异构体,可以实现C1-C15和C16-C26之间的相对构型分配。通过与天然产物的详细NMR比较,这两个1,6相关立体簇之间的相对立体化学被阐明为13,18- syn,而不是先前提出的13,18-反式。概述了使用高级C1-C28酮片段22的灵活和模块化策略,以阐明其余的立体化学特征并实现总合成。