Hydrosilylation of alkynes catalysed by trans- di-µ-hydrido-bis(tertiary phosphine)bis(silyl)diplatinum complexes
作者:Michael Green、John L. Spencer、F. Gordon A. Stone、Constantinos A. Tsipis
DOI:10.1039/dt9770001525
日期:——
diphenylacetylene undergo hydrosilylation in 70–90% yield using diplatinumcomplexes [Pt(SiR3)(µ-H)[(C6H11)3P]}2][SiR3= Si(CH2Ph)Me2, SiCl3, or SiEtMe2] as catalysts. Many of the reactions proceed exothermically after initial warming of the reactants. The stereochemistry of the products from but-1-yne, phenylacetylene, and but-2-yne has been established by 1H n.m.r. spectroscopy. Hydrosilylation of but-1-yne and
Styrylsilane coupling reagents for immobilization of organic functional groups on silica and glass surfaces
作者:Soo-Bin Kim、Chang-Hee Lee、Chul-Ho Jun
DOI:10.1039/c8cc04863k
日期:——
Styrylsilanes serve as new couplingreagents for introducing organic functional groups on silica and glass surfaces. Functionalized styrylsilanes, which are readily prepared via catalytic hydrosilylation of the corresponding phenylacetylenes with silanes, are immobilized on silica through acid catalyzed processes under mild conditions.
Cross‐Electrophile C(sp
<sup>2</sup>
)−Si Coupling of Vinyl Chlorosilanes
作者:Jicheng Duan、Ke Wang、Guang‐Li Xu、Shaolin Kang、Liangliang Qi、Xue‐Yuan Liu、Xing‐Zhong Shu
DOI:10.1002/anie.202010737
日期:2020.12.14
C−Si bond remains unexplored. Here we report a cross‐electrophile Csp2‐Si coupling reaction of vinyl/aryl electrophiles with vinyl chlorosilanes. This new protocol offers an approach for facile and precise synthesis of organosilanes with high molecular diversity and complexity from readily available materials. The reaction proceeds under mild and non‐basic conditions, demonstrating a high step economy
A new class of hydride-bridged platinum complex with application as hydrosilylation catalysts; molecular and X-ray crystal structure of trans-di-µ-hydrido-bis(tricyclohexylphosphine)bis(triethylsilyl)diplatinum(Pt–Pt)
作者:Michael Green、Judith A. K. Howard、Jill Proud、John L. Spencer、F. Gordon A. Stone、Constantions A. Tsipis
DOI:10.1039/c39760000671
日期:——
Ge; R = alkyl, aryl, alkoxy, Cl) affords, respectively, the hydride bridged dinuclear species [PtH(µ-H)(PCy3)]2 and [PtMR3(µ-H)-(PCy3)]2; the triethylsilyl complex, which along with the other group 4a species catalyses the addition of R3MH to olefins and acetylenes, was identified structurally by single crystal X-ray crystallography.
Competitive acylation of arylstyrylsilanes: Controlling silanucleophile reactivity
作者:Michael A. Brook、Courtney Henry
DOI:10.1016/0040-4020(95)00945-0
日期:1996.1
substitution reactions occurred cleanly between acyl cations and arylstyrylsilanes 2–4. With an unsubstituted aryl group, 2 underwent transfer of the styryl group to form styrylketone 5 as would be predicted from previous kinetic studies. With increasing methyl group substitution of the aryl group, aryl group transfer occurred competitively such that 3 showed a 2:1 preference for destyrylation: dearylation