The Hydroboration of 3-Chloro-1-trimethylsilyl-1-propyne with Dialkylboranes and Its Application to the Syntheses of (<i>E</i>)-3-Trimethylsilyl-2-alkenes and 3-Trimethylsilyl-1-alkenes
作者:Masayuki Hoshi、Yuzuru Masuda、Akira Arase
DOI:10.1246/bcsj.65.685
日期:1992.3
of the hydroboration mixture with aqueous sodium hydroxide gives a good yield of highly pure (E)-3-trimethylsilyl-2-alkene whose alkyl group migrates from the boron atom. On the other hand, successive treatment of the hydroboration mixture with methyllithium and acetic acid gives a good yield of 3-trimethylsilyl-1-alkene whose alkyl group migrates from the boron atom. The above procedures provide convenient
3-氯-1-三甲基甲硅烷基-1-丙炔与化学计量量的二烷基硼烷的反应进行到单硼氢化反应阶段,得到区域异构体的混合物,(Z)-二烷基(3-氯-1-三甲基甲硅烷基-1-丙烯基)硼烷和(Z)-二烷基[1-氯甲基-2-(三甲基甲硅烷基)乙烯基]硼烷。硼氢化混合物用乙酸质子化以定量产率得到(Z)-3-氯-1-三甲基甲硅烷基-1-丙烯。用氢氧化钠水溶液处理硼氢化混合物得到高纯度(E)-3-三甲基甲硅烷基-2-烯烃的良好收率,其烷基从硼原子迁移。另一方面,用甲基锂和乙酸连续处理硼氢化混合物可得到高产率的 3-三甲基甲硅烷基-1-烯烃,其烷基从硼原子迁移。上述程序提供了(E)-3-三甲基甲硅烷基-2-烯烃和3-三甲基甲硅烷基-1-烯烃的方便合成。建议通过衍生自...的相应烯丙基硼烷提供这两种产品。