Pd-catalyzed synthesis of allylsilanes from chlorosilanes and allyl ethers is described. The reaction proceeds efficiently at room temperature by the use of phenyl or vinyl Grignard reagent in the presence of palladiumcatalysts. The present method can also be applied to synthesis of propargylsilanes by the use of propargyl ethers.
Allenes react with Grignardreagents and chlorosilanes in the presence of a palladium catalyst giving rise to carbosilylated products bearing carbon groups from Grignardreagents at the central carbon and silyl groups at the terminal carbon. When alkyl halides were used instead of chlorosilanes, the corresponding alkylated products were obtained.
Manganese catalyzed dehydrogenative silylation of alkenes: Direct access to allylsilanes
作者:Shang Wu、Ying Zhang、Hongyan Jiang、Ning Ding、Yanbin Wang、Qiong Su、Hong Zhang、Lan Wu、Quanlu Yang
DOI:10.1016/j.tetlet.2020.152053
日期:2020.6
Dehydrogenativesilylation of alkenes with silanes to produce allylsilanes is achieved through manganese catalysis with a wide scope of substrate tolerance. This transformation involves silane radicals initiated by manganese complex without additional oxidant additives. It offers a general, convenient and practical protocol with excellent functional group compatibility and gram-scale capacity for the