Highly Enantioselective Direct Michael Addition of Nitroalkanes to Nitroalkenes Catalyzed by Amine−Thiourea Bearing Multiple Hydrogen-Bonding Donors
作者:Xiu-Qin Dong、Huai-Long Teng、Chun-Jiang Wang
DOI:10.1021/ol900025b
日期:2009.3.19
A highly diastereoselective and enantioselectiveMichaeladdition of nitroalkanes to nitroalkenes has been achieved by chiral bifunctionalamine−thioureacatalystbearingmultiplehydrogen-bondingdonors. This catalytic system performs well over a broad scope of substrates, furnishing various 1,3-dinitro compounds in high diastereoselectivity (up to 98:2) and excellent enantioselectivity (up to 99%