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.
Reactions of silyl enol ethers with [ethoxy(phenylethynyl)carbene]chromium and -tungsten complexes
作者:Francisco Camps、Lurdes Jordi、Josep M. Moretó、Susagna Ricart、Ana M. Castaño、Antonio M. Echavarren
DOI:10.1016/0022-328x(92)85047-z
日期:1992.9
The reaction of pentacarbonyl[ethoxy(phenylethynyl)carbene]chromium with silyl enolethers yields cyclobutenylcarbene complexes in moderate-to-good yield by a process that involves a Michael-type addition of the nucleophilic enolether to the Fischer carbene complex. An ene-type product and two pyranylidene chromium complexes were also obtained in these reactions. A pyranylidene complex was also obtained