Homogeneous catalysis. A transition metal based catalyst for the Mukaiyama crossed-aldol reaction and catalyst deactivation by electron transfer.
作者:William Odenkirk、John Whelan、B. Bosnich
DOI:10.1016/0040-4039(92)89017-7
日期:1992.9
The cationic complex [Ru(salen)(NO)H2O]SbF6 is intrinsically a powerful catalyst for the Mukaiyama crossed-aldol reaction at 25°C in nitromethane solutions and at very low catalyst loadings but, for some reactions, electron transferfrom the silylenolether to the ruthenium catalyst can occur which leads to catalyst deactivation.
Novel synthesis of β-siloxy esters by condensation of carbonyls and trimethylsilane with α,β-unsaturated esters catalyzed by RhCl3
作者:Anthony Revis、Terrence K. Hilty
DOI:10.1016/s0040-4039(00)96631-0
日期:1987.1
A novel one pot reaction of α,β-unsaturated esters with carbonyls and trimethylsilane gave good yields of β-siloxy esters. This RhCl3 catalyzed method improves upon the two step reaction of silylketeneacetals with carbonyls.
REVIS, ANTHONY;HILTY, TERRENCE K., TETRAHEDRON LETT., 28,(1987) N 41, 4809-4812
作者:REVIS, ANTHONY、HILTY, TERRENCE K.
DOI:——
日期:——
Homogeneous catalysis. transition metal based lewis acid catalysts.
作者:T. Keith Hollis、William Odenkirk、N.P. Robinson、John Whelan、B. Bosnich
DOI:10.1016/s0040-4020(01)87259-8
日期:1993.1
Transition metal basedLewisacids provide catalysts for the Diels-Alder and Mukaiyama reactions. These catalysts must possess an electron deficient axophilic metal center and a labile coordination position. Unlike traditional Lewisacids, those derived from transition metals can function in the presence of water and have welldefined structures. It is shown how a normally electron rich ruthenium atom