Enantioselective Organocatalytic Michael Addition Reactions between N-Heterocycles and Nitroolefins
摘要:
A method for Michael addition of N-heterocycles to nitroolefins has been developed. The process is promoted by a cinchona alkaloid derivative to give Michael adducts in moderate to high enantioselectivities.
A practical method for the synthesis of α-nitroamines by Michael addition of azide to nitroalkene has been developed. This reaction proceeds in high yields under very mild conditions (phase-transfer catalysis) and is found to be general; good yields are obtained with both aryl and alkyl derivatives as well as with 1,1-disubstituted ones. azides - amines - Michael addition - nitroalkenes - nitroamines