Chiral Hydroxytetraphenylene-Catalyzed Asymmetric Conjugate Addition of Boronic Acids to Enones
作者:Guo-Li Chai、A-Qiang Sun、Dong Zhai、Juan Wang、Wei-Qiao Deng、Henry N. C. Wong、Junbiao Chang
DOI:10.1021/acs.orglett.9b01637
日期:2019.7.5
(S)-2,15-Br2-DHTP-catalyzed asymmetric conjugate addition of boronic acids to β-trifluoromethyl α,β-unsaturated ketones and enones was studied. The reaction afforded the corresponding Michael addition products in moderate to high yields with excellent enantioselectivities (up to 99:1 er). This catalytic system features mild reaction conditions, high efficiency, and tolerance to heteroarylboronic acids
研究了(S)-2,15-Br 2 -DHTP催化硼酸向β-三氟甲基α,β-不饱和酮和烯酮的不对称共轭加成反应。该反应以中等至高收率提供了具有优异对映选择性(高达99:1 er)的相应的迈克尔加成产物。该催化系统具有温和的反应条件,高效率和对杂芳基硼酸的耐受性。