Secondary-Amine-Catalyzed Asymmetric Michael Addition of N-tert-Butoxycarbonyl-Protected Oxindoles to Maleimides
摘要:
A secondary-amine-catalyzed asymmetric Michael addition of 3-substituted N-(tert-butoxycarbonyl)oxindoles to maleimides with activation by a Bronsted base gives the corresponding products in high yields (86-98%), excellent diastereomeric ratios (dr > 99: 1), and high enantiomeric excesses (86-91% ee).
Secondary-Amine-Catalyzed Asymmetric Michael Addition of N-tert-Butoxycarbonyl-Protected Oxindoles to Maleimides
作者:Dieter Enders、Xuena Yang、Chuan Wang、Qijian Ni
DOI:10.1055/s-0032-1316577
日期:2012.8
A secondary-amine-catalyzed asymmetric Michael addition of 3-substituted N-(tert-butoxycarbonyl)oxindoles to maleimides with activation by a Bronsted base gives the corresponding products in high yields (86-98%), excellent diastereomeric ratios (dr > 99: 1), and high enantiomeric excesses (86-91% ee).