Trends in Asymmetric Michael Reactions Catalysed by Tripeptides in Combination with an Achiral Additive in Different Solvents
作者:Svetlana B. Tsogoeva、Sunil B. Jagtap、Zoya A. Ardemasova、Victor N. Kalikhevich
DOI:10.1002/ejoc.200400243
日期:2004.10
as chiral catalysts for asymmetric Michael addition reactions in the presence of an achiral additive has been tested in different solvents (CHCl3, acetone, DMF, DMSO and the room-temperature ionic liquid [bmim]PF6). The dependence of yields and enantiomeric excesses on the solvent used has been demonstrated. The experiments show that the combination of additive and peptides provides a catalytic system
在不同溶剂(CHCl3、丙酮、DMF、DMSO 和室温离子液体 [bmim]PF6)中测试了三肽 3、6 和 12 作为手性催化剂在非手性添加剂存在下进行不对称迈克尔加成反应的潜力. 已经证明了收率和对映体过量对所用溶剂的依赖性。实验表明,添加剂和肽的组合提供了一个似乎比其各部分总和更好的催化系统。(© Wiley-VCH Verlag GmbH & Co. KGaA, 69451 Weinheim, Germany, 2004)