Homobimetallic Rhodium NHC Complexes as Versatile Catalysts for Hydrosilylation of a Multitude of Substrates in the Presence of Ambient Air
作者:Aron J. Huckaba、T. Keith Hollis、Sean W. Reilly
DOI:10.1021/om400452q
日期:2013.11.11
di-Rh complexes based on 1,3-bis(3′-butylbenzimidazol-2′-ylidene)benzene were utilized as catalysts for hydrosilylation. Among the substrates investigated were aldehydes, ketones, α,β-unsaturated carbonyls, acyl chlorides, nitriles, alkenes, nitro groups, isocyanates, and tertiary amides. Additionally, carbon dioxide underwent hydrosilylation to produce dimethylphenylsilylformate. The catalysts compared
Mechanistic aspects of fluoride ion-catalyzed reduction of carbonyl compounds with hydrosilanes
作者:Makoto Fujita、Tamejiro Hiyama
DOI:10.1016/s0040-4039(00)96096-9
日期:1987.1
Fluoride ion-catalyzed reduction of aldehydes and ketones with hydrosilanes. Synthetic and mechanistic aspects and an application to the threo-directed reduction of .alpha.-substituted alkanones
作者:Makoto Fujita、Tamejiro Hiyama
DOI:10.1021/jo00258a003
日期:1988.11
Efficient hydrosilylation of carbonyl compounds by 1,1,3,3-tetramethyldisiloxane catalyzed by Au/TiO2
作者:Eleni Vasilikogiannaki、Ioannis Titilas、Charis Gryparis、Anastasia Louka、Ioannis N. Lykakis、Manolis Stratakis
DOI:10.1016/j.tet.2014.03.094
日期:2014.9
1,1,3,3-Tetramethyldisiloxane (TMDS) is a highly reactive reducing reagent in the Au/TiO2-catalyzed hydrosilylation of carbonyl compounds relative to monohydrosilanes. The reduction of aldehydes or ketones with TMDS can be performed on many occasions at ambient conditions within short reaction times and at low loading levels of gold, whereas typical monohydrosilanes require excess heating and prolonged time for completion. The product yields are excellent, while almost stoichiometric amounts of carbonyl compounds and TMDS can be used. It is postulated that the enhanced reactivity of TMDS is attributed to the formation of a gold dihydride intermediate. This intermediate is also supported by the fact that double hydrosilylation of carbonyl compounds by TMDS is a negligible pathway. (C) 2014 Elsevier Ltd. All rights reserved.
Chemoselektive mono- und disilyletherbildung aus tertiären und sekundären silanen