Stereoselective Iridium-N,P-Catalyzed Double Hydrogenation of Conjugated Enones to Saturated Alcohols
作者:Bram B. C. Peters、Jia Zheng、Suppachai Krajangsri、Pher G. Andersson
DOI:10.1021/jacs.2c02422
日期:2022.5.18
multitude of catalytic systems have been developed for this purpose. However, due to the different nature of the π-system, the hydrogenation of olefins and ketones is normally catalyzed by different metal complexes. Herein, a study on the effect of additives on the Ir-N,P-catalyzed hydrogenation of enones is described. The combination of benzamide and the development of a reactive catalyst unlocked a
前手性底物(如酮和烯烃)的不对称氢化是构建立体中心的重要工具,并且为此目的开发了多种催化体系。然而,由于π体系的性质不同,烯烃和酮的加氢反应通常由不同的金属配合物催化。本文介绍了添加剂对 Ir-N,P 催化的烯酮加氢影响的研究。苯甲酰胺的结合和活性催化剂的开发开启了 Crabtree 型配合物对 C=O 键加氢的新型反应模式。建议苯甲酰胺的作用是延长二氢化铱中间体的寿命,该中间体易于发生不可逆的三聚化,使催化剂失活。ee , 99/1 dr) 导致烯酮的高度立体选择性还原。