The stereocontrolled total synthesis of altohyrtin A/spongistatin 1: the AB-spiroacetal segment
作者:Ian Paterson、Mark J. Coster、David Y.-K. Chen、Renata M. Oballa、Debra J. Wallace、Roger D. Norcross
DOI:10.1039/b504146e
日期:——
The convergent synthesis of the C1-C15 AB-spiroacetal subunit of altohyrtin A/spongistatin 1 is described. This highly stereocontrolled synthesis relies on matched boron aldol reactions of chiral methyl ketones, under Ipc(2)BCl mediation, to establish the C5, C9 and C11 stereocentres, and formation of the desired thermodynamic spiroacetal under acidic conditions. The scalable synthetic sequence developed
描述了altyryrtin A /海绵抑素1的C1-C15 AB-螺缩醛亚基的收敛合成。这种高度立体控制的合成依赖于手性甲基酮在Ipc(2)BCl介导下的匹配的硼醛醇缩醛反应,以建立C5,C9和C11立体中心,并在酸性条件下形成所需的热力学螺缩醛。如第4部分所述,开发出的可扩展的合成序列可提供数克量的,从而能够成功完成altohyrtin A / spongistatin 1的总合成。