Enantio- and Diastereoselective Michael Reactions of Silyl Enol Ethers and Chalcones by Catalysis Using a Chiral Quaternary Ammonium Salt
作者:Fu-Yao Zhang、E. J. Corey
DOI:10.1021/ol015592k
日期:2001.2.1
[GRAPHICS]N-(9-Anthracenylmethyl)dihydrocinchonidinium bromide (1) is an effective catalyst for enantioselective Michael additions to chalcones, as shown in the above example, using toluene/50% aqueous KOH biphasic conditions at -20 degreesC.