Ligand-Controlled Remarkable Regio- and Stereodivergence in Intermolecular Hydrosilylation of Internal Alkynes: Experimental and Theoretical Studies
作者:Shengtao Ding、Li-Juan Song、Lung Wa Chung、Xinhao Zhang、Jianwei Sun、Yun-Dong Wu
DOI:10.1021/ja405752w
日期:2013.9.18
The first highly efficient ligand-controlled regio- and stereodivergent intermolecular hydrosilylations of internal alkynes have been disclosed. Cationic ruthenium complexes [Cp*Ru(MeCN)3](+) and [CpRu(MeCN)3](+) have been demonstrated to catalyze intermolecular hydrosilylations of silyl alkynes to form a range of vinyldisilanes with excellent but opposite regio- and stereoselectivity, with the former
Synthesis of lanthanide(II)–imine complexes and their use in carbon–carbon and carbon–nitrogen unsaturated bond transformation
作者:Ken Takaki、Kimihiro Komeyama、Katsuomi Takehira
DOI:10.1016/j.tet.2003.06.003
日期:2003.12
1 quantitatively, the structure of which was characterized by X-ray analysis. The imine complexes 1 catalyzed dehydrogenativesilylation of terminal alkynes, hydrosilylation of imines and alkenes, and intermolecular hydrophosphination of alkynes. Moreover, dehydrogenative double silylation of conjugated dienes was achieved with 1.
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
Trialkylsilanes readily undergo dehydrocondensation with acetylene and substituted acetylenes in the presence of the catalytic systems, H2PtCl6/iodine, lithium iodide or /trialkyliodosilanes, and so the monosubstitutedacetylenes HCCR (R = C4H9, C(CH3)3, CH2Cl, C6H5) smoothly afford the corresponding trialkyl(organylethynyl)silanes. In hexane or benzene the yield of the dehydrocondensation products
在催化体系,H 2 PtCl 6 /碘,碘化锂或/三烷基碘硅烷的存在下,三烷基硅烷很容易与乙炔和取代的乙炔进行脱氢缩合反应,因此单取代的乙炔HCCR(R = C 4 H 9,C(CH 3)3,CH 2 Cl,C 6 H 5)平稳地得到相应的三烷基(有机基乙炔基)硅烷。在己烷或苯中,脱氢缩合产物的产率为90%。三乙基硅烷与乙炔的脱氢产物为双(三乙基磺酰基)乙炔和1,2-双(三乙基甲硅烷基)乙烷。讨论了反应机理。
Gallium Trichloride-Catalyzed Exhaustive α-Ethynylation Reaction of 1-Silylacetylenes
作者:Ryo Amemiya、Masahiko Yamaguchi
DOI:10.1002/adsc.200600399
日期:2007.5.7
Gallium trichloride (GaCl3) catalyzes the ethynylation reaction of a 1,4-enyne with chlorosilylacetylene at the propargyl position giving a triethynylvinylmethane. This catalytic method can be applied to the exhaustiveα-ethynylation of 1-silylacetylenes possessing less acidic propargyl protons, and mono-, di-, and triethynylated products are obtained depending on the structure of the starting materials