Enantioselective Synthesis of (+)-Ricciocarpin A Using an Auxiliary Hydroxyl Group and a Diastereofacial Selectivity Based Methodology
作者:Gérard Audran、Elie Palombo、Honoré Monti
DOI:10.1055/s-2005-871932
日期:——
An enantioselective synthesis of (+)-ricciocarpin A is described starting from (+)-karahana lactone as an enantiopure buildingblock. This synthesis involves a stereofacially directed diastereoselective hydroboration for the installation of the required stereogenic center, and the efficientconversion of an intermediate hydroxyaldehyde to the one-carbon homologated cyanide, using the mild formation
描述了从 (+)-karahana 内酯作为对映体纯构建块开始的 (+)-ricciocarpin A 的对映选择性合成。该合成涉及立体定向的非对映选择性硼氢化反应以安装所需的立体中心,以及中间体羟基醛有效转化为一碳同系氰化物,使用温和的氰醇形成,然后是一锅两步巴顿-McCombie 羟基部分的双脱氧序列。