An Effective Bifunctional Thiourea Catalyst for Highly Enantio- and Diastereoselective Michael Addition of Cyclohexanone to Nitroolefins
作者:Wen-Jing Xiao、Yi-Ju Cao、Hai-Hua Lu、Yuan-Yuan Lai、Liang-Qiu Lu
DOI:10.1055/s-2006-950339
日期:2006.11
A series of new tunable and bifunctional thiourea catalysts have been synthesized and their catalytic activities are evaluated in the direct Michaeladdition of cyclohexanone to nitroolefins. High isolated yields (up to 97%), enantioselectivities (up to 98%) and diastereoselectivities (up to 99:1) were obtained under the optimal conditions.