中文名称 | 英文名称 | CAS号 | 化学式 | 分子量 |
---|---|---|---|---|
乙烯基三苯基硅烷 | vinyltriphenylsilane | 18666-68-7 | C20H18Si | 286.448 |
1-溴乙烯基(三苯基)硅烷 | α-bromovinyltriphenylsilane | 18676-45-4 | C20H17BrSi | 365.344 |
Triarylsilylmethylmetallic reagents have been prepared by several routes: metalation; addition of phenyllithium to vinyltriphenylsilane; direct synthesis; and by halogen–metal exchange. The latter method is highly superior as regards both generality of application and yields. Dibromomethylsilanes undergo halogen-metal exchange at −78°, and reaction of the product with hydrogen bromide serves as a valuable way of converting geminal dibromides to monobromides. The organometallic reagents have been characterized in several ways, in particular by carbonation to give the related carboxylic acid.