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.
ZrOCl2·8H2O on montmorillonite K10 accelerated conjugate addition of amines to α,β-unsaturated alkenes under solvent-free conditions
作者:Mohammed M. Hashemi、Bagher Eftekhari-Sis、Amir Abdollahifar、Behzad Khalili
DOI:10.1016/j.tet.2005.10.006
日期:2006.1
At roomtemperature, ZrOCl2·8H2O on montmorillonite K10 efficiently catalyzes conjugate addition of amines to a variety of conjugated alkenes such as α,β-unsaturated carbonyl compounds, carboxylic esters, nitriles and amides undersolvent-freeconditions. The catalyst can be recycled for subsequent reactions without any appreciable loss of efficiency.
A General Method for the Preparation of β-Aminoesters
作者:Alan R. Katritzky、Konstantina Yannakopoulou
DOI:10.1055/s-1989-27381
日期:——
3-Dialkylamino (3) and 3-benzyloxycarbonylamino (6) esters are prepared by the Reformatsky reaction of 1-dialkylamino-(1) and 1-benzyloxycarbonylamino-(5) 1-(1-benzotriazolyl)alkanes with ethyl 2-bromoalkanoates. Compounds 1 and 5 are obtained by the condensation of benzotriazole, an aldehyde, and a secondary amine or benzyl carbamate. The procedure can be performed by as a one-pot reaction from benzotriazole.