Highly efficient aza-Michael reactions of aromatic amines and N-heterocycles catalyzed by a basic ionic liquid under solvent-free conditions
作者:Lei Yang、Li-Wen Xu、Wei Zhou、Lyi Li、Chun-Gu Xia
DOI:10.1016/j.tetlet.2006.08.103
日期:2006.10
A task-specific basic ionicliquid, [Bmim]OH, has been introduced as a catalyst for the aza-Michaeladdition of aromaticamines and N-heterocycles to cyclic or acyclic ketones under neat conditions. The catalyst can be recycled for subsequent reactions without any appreciable loss of efficiency.
An environmentally benign protocol: catalyst-free Michael addition of aromatic amines to α,β-unsaturated ketones in glycerol
作者:Anguo Ying、Qunhui Zhang、Hongmin Li、Gangfeng Shen、Weizhong Gong、Mingju He
DOI:10.1007/s11164-012-0575-0
日期:2013.2
Glycerol was used as a reaction medium as well as promoter for aza-Michael addition of aromatic amines to electronic deficient α,β-unsaturated ketones. Various aromatic amines can react smoothly with chalcone, 2-cyclohexen-1-one, 2-cyclopenten-1-one, and ethyl vinyl ketone to achieve good to excellent yields in the absence of any catalyst.
Guanidine-based task-specific ionic liquids as catalysts for aza-Michael addition under solvent-free conditions
作者:Anguo Ying、Ming Zheng、Haidan Xu、Fangli Qiu、Changhua Ge
DOI:10.1007/s11164-011-0296-9
日期:2011.10
An efficient and facile protocol for aza-Michaeladdition of aliphatic and aromaticamines to electron-deficit alkenes using [TMG][Lac] as catalyst under solvent-free conditions was established.
Green, efficient and practical Michael addition of arylamines to α,β-unsaturated ketones
作者:Ran Jiang、Dan-Hua Li、Jing Jiang、Xiao-Ping Xu、Tao Chen、Shun-Jun Ji
DOI:10.1016/j.tet.2011.03.082
日期:2011.5
The aza-Michael addition of aromatic amines to alpha,beta-unsaturated ketones was carried out effectively at room temperature in good to excellent yields without any catalyst or solvent. It was significant that part of adducts could be collected in almost quantitative yield without column chromatography. This procedure offered a green, efficient, and practical approach for the synthesis of beta-amino ketones. (C) 2011 Elsevier Ltd. All rights reserved.
Aza-Michael reaction promoted by aqueous sodium carbonate solution
作者:Xiao-Ji Tang、Zhao-Lei Yan、Wen-Liang Chen、Ya-Ru Gao、Shuai Mao、Yan-Lei Zhang、Yong-Qiang Wang
DOI:10.1016/j.tetlet.2013.03.043
日期:2013.5
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.