Aza-Michael reaction promoted by aqueous sodium carbonate solution
摘要:
A general and efficient aza-Michael reaction promoted by aqueous sodium carbonate solution has been developed. The reaction has complete mono-alkylation selectivity and proceeds with complete chirality retention for chiral amino esters. With a broad substrate scope, a well-common catalyst and simple operation, the catalytic approach provides a facile, practicable, economical, and environmentally benign method for the synthesis of beta-amino carbonyl compounds. (c) 2013 Elsevier Ltd. All rights reserved.
Diastereoselective Synthesis of 4-Hydroxypiperidin-2-ones via Cu(I)-Catalyzed Reductive Aldol Cyclization
作者:Hon Wai Lam、Gordon J. Murray、James D. Firth
DOI:10.1021/ol052599j
日期:2005.12.1
[chemical reaction: see text]. 4-Hydroxypiperidin-2-ones may be prepared in highly diastereoselective fashion using a Cu(I)-catalyzed reductive aldol cyclization of alpha,beta-unsaturated amides with ketones. Used in combination with proline-catalyzed asymmetric Mannichreactions, this methodology enables the enantioselectivesynthesis of more highly functionalized piperidin-2-ones and hydroxylated