Cu(acac)2 Immobilized in Ionic Liquids: A Recoverable and Reusable Catalytic System for Aza-Michael Reactions
作者:M. Lakshmi Kantam、V. Neeraja、B. Kavita、B. Neelima、Mihir K. Chaudhuri、Sahid Hussain
DOI:10.1002/adsc.200404361
日期:2005.5
Copper(II) acetylacetonate immobilized in ionicliquids efficiently catalyzes the aza-Michaelreaction of amines with α,β-unsaturated carbonyl compounds to produce the corresponding β-amino carbonyl compounds with great alacrity in excellent yields. The reactions are far more facile than those reported earlier. The recoveredionicliquid phase containing the copper catalyst can be reused for several cycles
Mannich-type reactions of aldehydes with secondary amines and a ketene silyl acetal were promoted by trimethoxyborane in DMSO to afford the corresponding β-amino esters in good yields. B(OMe)3 also promoted Ugi-typereactions ofaldehydes with secondary amines and isocyanides in 1,2-dichloroethane, which leads to the formation of α-amino amides. In these reactions, trimethoxyborane serves as an inexpensive
Diarylborinic Acid Derivatives as a Catalytic Iminium Ion Generator in the Mannich-Type Reaction Using Secondary Amines, Aldehydes, and Ketene Silyl Acetals
作者:Michinori Suginome、Yusuke Tanaka、Tomoaki Hasui
DOI:10.1055/s-2008-1072724
日期:2008.5
Reactions of secondary amines, aldehydes, and ketene silyl acetals were efficiently promoted by catalytic amounts of diarylborinic acid esters, Ar 2 B(OR), affording β-amino esters selectively with no formation of the corresponding β-hydroxy esters.
催化量的二芳基硼酸酯 Ar 2 B(OR) 有效地促进了仲胺、醛和乙烯酮甲硅烷基缩醛的反应,选择性地提供了 β-氨基酯,而不会形成相应的 β-羟基酯。
The Addition of Saturated Heterocyclic Amines to Cinnamate Esters
作者:C. B. Pollard、G. C. Mattson
DOI:10.1021/ja01597a062
日期:1956.8
LiClO4 Accelerated Michael addition of amines to α,β-unsaturated olefins under solvent-free conditions
作者:Najmedin Azizi、Mohammad R Saidi
DOI:10.1016/j.tet.2003.11.012
日期:2004.1
Several primary and secondary amines were added to alpha,beta-unsaturated esters, nitriles, amides, and ketones to give the corresponding saturated amines mediated by solid lithium perchlorate under solvent-free and environmentally friendly conditions at room temperature. (C) 2003 Elsevier Ltd. All rights reserved.