Enantioselective Conjugate
Addition of N-Heterocycles to α,β-Unsaturated Ketones
Catalyzed by Chiral Primary Amines
作者:Wenhu Duan、Wei Wang、Guangshun Luo、Shilei Zhang
DOI:10.1055/s-0029-1216636
日期:——
A new organocatalytic enantioselectiveconjugateaddition reaction of nitrogen-centered heterocycles with α,β-unsaturated ketones has been developed. Promoted by a chiral cinchona alkaloid derived primary amine, the reaction affords the adducts in moderate to high enantioselectivities. primary amines - N-heterocycles - enones - conjugateaddition - catalysis
Organocatalytic Enantioselective aza-Michael Additions of N-Heterocycles to α,β-Unsaturated Enones
作者:Jian Lv、Hao Wu、Yongmei Wang
DOI:10.1002/ejoc.200901227
日期:2010.4
A procedure for enantioselectiveorganocatalytic conjugate additions of a variety of N-heterocycles to α,β-unsaturated enone systems is presented. The reactions are efficiently catalyzed by salts of 9-amino-9-deoxy-epiquinine (3d). Cyclic, acyclic, and aromatic enones can be used in reactions with 1H-benzotriazole (1a) or 5-phenyltetrazole derivatives 12, providing the Michael addition products in