Etude de l'obtention d'enoxysilanes par action du triethylsilane sur des cetones enolisables, aliphatiques ou cyclaniques, en presence de catalyseurs au nickel
alkenoxysilanes has been achieved by the reaction of enolizable aliphatic or cyclic ketones with triethylsilane in the presence of nickel catalysts. For some catalysts, the reaction can be directed to give exclusively one or the other of these derivatives. The use of certain nickel catalysts gives very high yields of alkenoxysilanes, and this has been closely investigated.
found that dehydrogenative silylation of ketones with hydrosilanes proceeds in the presence of a transition metal catalyst such as palladium on carbon or iridium carbonyl, with amine and halide as cocatalysts, to give the corresponding silylenolethers in good yields. The present reaction is applicable for a variety of ketones and hydrosilanes with complete regioselectivity.
Hydrosilylation of Ketones, Imines and Nitriles Catalysed by Electrophilic Phosphonium Cations: Functional Group Selectivity and Mechanistic Considerations
作者:Manuel Pérez、Zheng-Wang Qu、Christopher B. Caputo、Vitali Podgorny、Lindsay J. Hounjet、Andreas Hansen、Roman Dobrovetsky、Stefan Grimme、Douglas W. Stephan
DOI:10.1002/chem.201406356
日期:2015.4.20
efficient hydrosilylation of ketones, imines and nitriles at room temperature. In the presence of this catalyst, adding one equivalent of hydrosilane to a nitrile yields a silylimine product, whereas adding a second equivalent produces the corresponding disilylamine. [(C6F5)3PCl][B(C6F5)4] and [(C6F5)3PBr][B(C6F5)4] are also synthesised and tested as catalysts. Competition experiments demonstrate that the
亲电子phospho盐,[(C 6 F 5)3 PF] [B(C 6 F 5)4 ],在室温下催化酮,亚胺和腈的有效氢化硅烷化。在这种催化剂的存在下,向腈中加入一当量的氢硅烷会产生甲硅烷基苯丙胺产物,而添加第二当量的甲硅烷会产生相应的二甲硅烷基胺。[(C 6 F 5)3 PCl] [B(C 6 F 5)4 ]和[(C 6 F 5)3 PBr] [B(C 6 F 5)4也被合成并作为催化剂测试。竞争实验表明,该反应对以下官能团表现出选择性,其优先顺序为:酮>腈>亚胺>烯烃。计算研究表明,该反应机理涉及通过与with中心的相互作用而使SiH键初始活化。然后,活化的络合物协同作用于不饱和底物上。
Sur l'obtention d'enoxysilanes par action d'hexaalkyldisilanes sur des cetones enolisables, en milieu HMPT
作者:P. Gerval、E. Frainnet
DOI:10.1016/s0022-328x(00)85037-8
日期:1978.6
Sadych-Sade; Petrow, Zhurnal Obshchei Khimii, 1959, vol. 29, p. 3194,3196; engl. Ausg. S. 3159, 3160