Organocatalytic Enantioselective Michael Addition of 4-Hydroxycoumarin to α,β-Unsaturated Ketones: A Simple Synthesis of Warfarin
作者:Zhenhua Dong、Lijia Wang、Xiaohong Chen、Xiaohua Liu、Lili Lin、Xiaoming Feng
DOI:10.1002/ejoc.200900831
日期:2009.10
secondary amine amide catalysts were developed for the asymmetric Michael addition of 4-hydroxycoumarin to α,β-unsaturated ketones. A series of important biologically and pharmaceutically active compounds were obtained in excellent yields (up to 99 %) with high enantioselectivities (up to 89 % ee) under mild conditions. In addition, enantiopure product could be obtained by a single recrystallization
开发了一种 C2 对称仲胺酰胺催化剂,用于 4-羟基香豆素与 α,β-不饱和酮的不对称迈克尔加成。在温和的条件下,以优异的收率(高达 99%)和高对映选择性(高达 89% ee)获得了一系列重要的生物和药物活性化合物。此外,单次重结晶可以得到对映体纯的产物。(© Wiley-VCH Verlag GmbH & Co. KGaA, 69451 Weinheim, Germany, 2009)