作者:Jamison B. Tuttle、Stéphane G. Ouellet、David W. C. MacMillan
DOI:10.1021/ja0653066
日期:2006.10.1
The first enantioselective organocatalytic transfer hydrogenation of cyclic enones has been accomplished. The use of iminium catalysis has provided a new organocatalytic strategy for the enantioselective reduction of beta,beta-substituted alpha,beta-unsaturated cycloalkenones, to generate beta-stereogenic cyclic ketones. The use of imidazolidinone 4 as the asymmetric catalyst has been found to mediate
环烯酮的第一个对映选择性有机催化转移氢化已经完成。亚胺催化的使用为β,β-取代的α,β-不饱和环烯酮的对映选择性还原提供了一种新的有机催化策略,以生成β-立体环酮。已发现使用咪唑烷酮 4 作为不对称催化剂可介导大量烯酮底物与叔丁基 Hantzsch 酯作为廉价氢源的氢化。催化剂 4 使环烯酮对映选择性转移氢化的能力已扩展到五、六和七元环系统。