Highly Enantioselective Conjugate Addition of 3-Substituted Oxindoles to Vinyl Sulfone Catalyzed by Binaphthyl-Modified Tertiary Amines
作者:Dae Kim、Hyun Lee、Seung Kang
DOI:10.1055/s-0030-1260770
日期:2011.7
The enantioselective conjugate addition reaction of 3-substituted oxindoles with 1,1-bis(benzenesulfonyl)ethylene by binaphthyl-modified bifunctional organocatalysts was investigated. The corresponding Michael adducts, containing a quaternary center at C3 position of the oxindoles, were generally obtained in high yields with excellent enantioselectivities (up to 99% ee).
研究了联萘修饰的双功能有机催化剂对 3-取代羟吲哚与 1,1-双(苯磺酰基)乙烯的对映选择性共轭加成反应。相应的迈克尔加合物,在羟吲哚的 C3 位置包含一个四元中心,通常以高产率获得,具有出色的对映选择性(高达 99% ee)。