Catalytic transformations of oligocarbosilanes induced by AlCl3
摘要:
Catalytic activation of Si-C bonds in poly(vinyltrimethylsilane) was studied using a model reaction of catalytic transformations of oligocarbosilanes Me3Si(CH2)(n)SiMe3 (n = 2, 3) in dichlorodimethylsilane in the presence of AlCl3 as an example. The formation of ClMe2Si(CH2)(n)SiMe3 Was established by chromato-mass spectrometry and GLC.
Air- and moisture-stable Xantphos-ligated palladium dialkyl complex as a precatalyst for cross-coupling reactions
作者:Rina Takahashi、Koji Kubota、Hajime Ito
DOI:10.1039/c9cc06946a
日期:——
xantphos has been employed in a variety of palladium-catalyzed cross-couplingreactions, there has been little progress in developing Xantphos-ligated precatalysts. In this report, we describe a Xantphos-ligated palladium dialkyl complex that acts as a powerful precatalyst for C-N, C-S, and C-C cross-couplingreactions. This precatalyst is air- and moisture stable but can be thermally activated in the
Silicon(II) Cation Cp*Si:<sup>+</sup>X<sup>–</sup>: A New Class of Efficient Catalysts in Organosilicon Chemistry
作者:Elke Fritz-Langhals
DOI:10.1021/acs.oprd.9b00260
日期:2019.11.15
The catalytic activity of the pentamethylcyclopentadienylsilicon(II) cation Cp*Si:+ was investigated. It was shown that Cp*Si:+ efficiently catalyzes reactions of technical relevance in organosiliconchemistry: Cp*Si:+ proved to be a very efficient nonmetallic catalyst for the hydrosilylation of olefins at low catalyst amounts of <0.01 mol % and for the Piers–Rubinsztajn reaction in order to make controlled
Decamethyltitanocene hydride intermediates in the hydrogenation of the corresponding titanocene-(η<sup>2</sup>-ethene) or (η<sup>2</sup>-alkyne) complexes and the effects of bulkier auxiliary ligands
reactions of titanocene [Cp*2Ti] (Cp* = η5-C5Me5) and its derivatives [Cp*(η5:η1-C5Me4CH2)TiMe] and [Cp*2Ti(η2-CH2=CH2)] with excess dihydrogen at room temperature and pressures lower than 1 bar revealed the formation of dihydride [Cp*2TiH2] (1) and the concurrent liberation of either methane or ethane, depending on the organometallic reactant. The subsequent slow decay of 1 yielding [Cp*2TiH] (2) was mediated
Tetrakis(trimethylsilyl)butatriene was readily prepared by flash vacuum pyrolysis of hexakis(trimethylsilyl)-2-butyne. The physical and chemical properties of the butatriene are described.
Electrosynthèse en chimie organosilicique: silylation sélective de polychlorométhanes
作者:P. Pons、C. Biran、M. Bordeau、J. Dunoguès
DOI:10.1016/0022-328x(88)87068-2
日期:1988.12
Silylation by electroreduction of carbon tetrachloride, chloroform or methylene chloride is more selective than the common organometallic route. Me3SiCCl3 (94%) and (Me3Si)2CCl2 (68%) were thus obtained from CCl4, Me3SiCHCl2 (94%) and (Me3Si)2CHCl (56%) from CHCl3 and Me3SiCH2Cl (90%) from CH2Cl2. Complete silylation of polychloromethanes was also successful by electrosynthesis and gave satisfactory