Asymmetric Synthesis of 3,4,5,6-Tetrasubstituted Piperidin-2-ones by Three-Component Coupling
作者:Stephen Davies、Andrew Smith、Andrew Cowley
DOI:10.1055/s-2004-830887
日期:——
The asymmetric three-component coupling of α,β-unsaturated esters and alkylidene malonates initiated with a homochiral lithium amide proceeds with high levels of diastereoselectivity, with hydrogenation of the resultant α-substituted β-amino acid derivatives giving a range of differentially protected 3,4,5,6-tetrasubstituted piperidinones with four contiguous stereogenic centres.
以手性锂胺为引发剂的α,β-不饱和酯与烷基亚甲基美克酮的不对称三组分耦合反应具有高的消旋选择性,氢化所得的α-取代β-氨基酸衍生物可得到一系列不同保护基的3,4,5,6-四取代哌啶酮,具有四个连续的立体中心。