Electrolytic reduction of dichloromethylphenyl-, dichlorodiphenyl-, dichlorodi-o-tolyl-, and dichlorodi-p-tolylsilanes in the presence of 2,3-dimethylbutadiene afforded 1-methyl-1-phenyl-, 1,1-diphenyl-, 1,1-di-o-tolyl-, and 1,1-di-p-tolyl-3,4-dimethyl-1-silacyclopent-3-ene, respectively, while the similar reaction of chloromethyldiphenylsilane with 2,3-dimethylbutadiene afforded 1-(methyldiphenylsilyl)- and 1,4-bis(methyldiphenylsilyl)-2,3-dimethyl-2-butene. A reaction mechanism leading to these products has been discussed.
The selective synthesis of di- and cyclosiloxanes bearing several hidden p-tolyl-functionalities
作者:Irina K. Goncharova、Sergey P. Kutumov、Roman A. Novikov、Tatyana Yu. Shiryaeva、Alexander D. Volodin、Alexander A. Korlyukov、Ashot V. Arzumanyan
DOI:10.1016/j.jorganchem.2022.122482
日期:2022.11
This study reports the development of a selective method for the synthesis of p-tolylsiloxanes, namely, symmetrical disiloxanes and cyclotetrasiloxanes, by hydrolytic condensation of p-tolyl-containing mono(ethoxy)silanes and di(ethoxy)silanes in the presence of [Me4N]+OH–. The reaction occurs under mild and simple reaction conditions: at 30 °C, under atmospheric pressure, in 1–5 h, in acetone and