Construction of highly sterically hindered 1,1-disilylated terminal alkenes
作者:Xueyan Zhang、Xin Ji、Xingze Xie、Shengtao Ding
DOI:10.1039/c8cc07765g
日期:——
One direct and efficient procedure for the synthesis of 1,1-disilylated terminal alkenes is demonstrated in this paper. To overcome and rationally utilize the steric hindrance of silyl units, the cationic ruthenium catalyst [CpRu(MeCN)3]+ was found to be effective for Markovnikov hydrosilylation of 1-silyl terminal alkynes with high yields and excellent regioselectivity. Dissimilarities between alkyl
A new convenient and effective method for the synthesis of unsymmetrical 1,1-bis(silyl)ethenes is described. The synthetic methodology involves selective silylative coupling cyclization of N-methyl-N-(dimethylvinylsilyl)-2-(dimethylvinylsilyloxy)ethanamine catalyzed by a ruthenium hydride complex and subsequent one-pot reaction of the cyclic bis(silyl)derivative with Grignard reagents followed by alcoholysis
Insertion of vinylsilane into the ruthenium–silicon bond—direct evidence for the non-metallacarbene mechanism of silylalkene disproportionation
作者:Bogdan Marciniec、Cezary Pietraszuk
DOI:10.1039/c39950002003
日期:——
The reversible insertion of the vinylsilane molecule into the RuâSi bond occurs in two different ways to give E-1,2-bis(silyl)ethene and 1,1-bis(silyl)ethene which, in combination with the previous experiments by Wakatsuki et al., provides convincing evidence for a non-metallacarbene mechanism of silylalkene disproportionation.
Nucleophilic substitution reactions of chlorosilanes with aryl Grignard reagents take place efficiently in the presence of copper(I) iodide to afford tetraorganosilanes.