Hydrogen-Bond-Promoted C-C Bond-Forming Reaction: Catalyst-Free Michael Addition Reactions in Ethanol
作者:Seiji Shirakawa、Shoichi Shimizu
DOI:10.1055/s-2007-992377
日期:——
A practical protocol for catalyst-free Michael addition reactions in ethanol was developed. The reaction was promoted efficiently in alcohol without any additives, and the importance of hydrogen-bonding activation was suggested.
A Benzannulation Protocol To Prepare Substituted Aryl Amines Using a Michael-Aldol Reaction of β-Keto Sulfones
作者:Sezgin Kiren、Albert Padwa
DOI:10.1021/jo9017793
日期:2009.10.16
A practical benzannulation method to prepare variously substituted aryl amines and sulfides was developed. The approach involves a Michael-aldol reaction of β-keto sulfones with enones followed by a subsequent condensation of the initial adduct with various amines. The base-induced Michael-aldol cascade proceeds smoothly with a number of different β-keto sulfones, affording the adducts as single diastereomers