Asymmetric hydroamination of acrylonitrile derivatives catalyzed by Ni(II)-complexes
作者:Luca Fadini、Antonio Togni
DOI:10.1016/j.tetasy.2008.11.010
日期:2008.11
Chiral ferrocenyl tridentate phosphine ligands were synthesized and used in asymmetric hydroamination reactionscatalyzed by Ni(II)-complexes. Compounds of the type [Ni(PPP)L]2+, where L is a chloride, solvent molecule or a coordinated substrate, were isolated. The efficiency of these complexes in asymmetric catalysis was high when aliphatic or aromatic amines were reacted with electron-poor olefins
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.