作者:Gary E. Keck、Yam B. Poudel、Thomas J. Cummins、Arnab Rudra、Jonathan A. Covel
DOI:10.1021/ja110198y
日期:2011.2.2
synthetic route adopted is a highly convergent one in which the preformed, heavily functionalized pyran rings A and C are united by "pyran annulation", the TMSOTf-promoted reaction between a hydroxyallylsilane appended to the A-ring fragment and an aldehyde contained in the C-ring fragment, with concomitant formation of the B ring. Further elaborations of the resulting very highly functionalized intermediate
苔藓抑素 1 是一种海洋天然产物,是一种非常有前景的先导化合物,因为它对多种人类疾病状态显示出强大的生物活性。我们在此描述了该试剂的首次全合成。所采用的合成路线是一种高度收敛的路线,其中预先形成的、高度官能化的吡喃环 A 和 C 通过“吡喃环化”结合,即附加在 A 环片段上的羟基烯丙基硅烷与包含在 A 环片段中的醛之间的 TMSOTf 促进反应。 C 环片段,伴随 B 环的形成。所得的高度官能化中间体的进一步加工包括大环内酯化和仅存在的五个酯键之一的选择性裂解。