Short Diastereoselective Synthesis of the C1-C13 (AB Spiroacetal) and C17-C28 Fragments (CD Spiroacetal) of Spongistatin 1 and 2 through Double Chain-Elongation Reactions
作者:Christopher L. Flowers、Pierre Vogel
DOI:10.1002/chem.201002204
日期:2010.12.17
to further the spiroacetals derived from them, which utilizes a bidirectional Hosomi–Sakurai allylation approach around key allylsilanes in the synthesis of the AB and CD ring systems of spongistatin 1 and 2, is reported. The synthesis of the AB spiroacetal 9 requires 13 steps, with a longest linear sequence of seven steps in an overall yield of 27 %. The synthesis of the CD spiroacetal 13 requires 15
据报道,一种独特而实用的合成序列可快速获得聚酮化合物,并进一步促进衍生自它们的螺缩醛。在合成海绵状抑素1和2的AB和CD环系统中,它利用围绕关键烯丙基硅烷的双向Hosomi-Sakurai烯丙基化方法。AB螺缩醛9的合成需要13个步骤,最长的线性顺序是7个步骤,总产率为27%。CD螺缩醛13的合成需要15个步骤,最长的线性顺序为11个步骤,总产率为30%。两种合成均从丁3烯醇开始。