Chitosan-Based Heterogeneous Catalysts for Enantioselective Michael Reaction
作者:Yanyan Qin、Wenshan Zhao、Lili Yang、Xuan Zhang、Yuanchen Cui
DOI:10.1002/chir.22058
日期:2012.8
Novel chitosan‐supported cinchona alkaloids have been developed as heterogeneouscatalysts for enantioselectiveMichaelreaction. As‐synthesized products as organocatalysts for asymmetric Michaelreaction have a high efficiency, providing highly functionalized products (containing adjacent quaternary and tertiary stereocenters) with good stereoselectivity (up to 93% enantiomeric excess) in high yields