Formation of silanethiols by reaction of silanes with carbonyl sulfide: implications for radical-chain reduction of thiocarbonyl compounds by silanes
作者:Yudong Cai、Brian P. Roberts
DOI:10.1016/s0040-4039(00)02109-2
日期:2001.1
tributyltin hydride in the Barton–McCombie deoxygenation of alcohols via their xanthates under mild conditions. Reduction of xanthates by silanes can produce COS as a by-product, leading to the in situ formation of silanethiol that will then act as a protic polarity-reversal catalyst for the reduction.
Enantioselective radical-chain hydrosilylation of prochiral alkenes using optically active thiol catalysts
作者:M.Bodrul Haque、Brian P. Roberts
DOI:10.1016/s0040-4039(96)90165-3
日期:1996.12
The radical-chain hydrosilylation of alkenes of the type H2C=CR(1)R(2), catalysed by small amounts of optically active thiols, affords functionalised organosilanes in moderate enantiomeric purity by a mechanism which involves enantioselective hydrogen-atom transfer from the thiol to a prochiral beta-silylalkyl radical. Copyright (C) 1996 Elsevier Science Ltd
Observations on the reactivity of thiyl radicals derived from 3,6-epidithiodiketopiperazine-2,5-diones and related congeners
A range of thiyl radicalsderivedfrom the reduced form of epidithiodiketopiperazines (ETPs) act as polarity reversal catalysts for the hydrosilylation of an enol lactone but not for H-atom abstraction from a model ribose ester.