Stereocontrolled Creation of All-Carbon Quaternary Stereocenters by Organocatalytic Conjugate Addition of Oxindoles to Vinyl Sulfone
作者:Qiang Zhu、Yixin Lu
DOI:10.1002/anie.201003837
日期:2010.10.11
residues have been prepared (see scheme), and found to be very effective towards the asymmetric addition of 3‐alkyl‐oxindoles to 1,1‐bis(benzenesulfonyl)ethylene. This synthetic protocol has led to the enantioselective synthesis of 3‐alkyl‐3‐aryl‐disubstituted oxindoles and indolines with an all‐carbon quaternary stereogenic center.
运行中的多功能催化剂:已制备出一类新型的含有天然氨基酸残基的三官能硫脲催化剂(请参阅方案),发现该催化剂对将3-烷基-氧吲哚不对称加成到1,1-双(苯磺酰基)上非常有效。乙烯。该合成方案导致具有全碳四元立体异构中心的3-烷基-3-芳基二取代的羟吲哚和二氢吲哚的对映选择性合成。