Base-Catalyzed Dehydrogenative Si-O Coupling of Dihydrosilanes: Silylene Protection of Diols
作者:Martin Oestreich、Agnieszka Grajewska
DOI:10.1055/s-0030-1258055
日期:2010.10
The direct dehydrogenative coupling of 1,3- and 1,4-diols and dihydrosilanes is efficiently catalyzed by Cs 2 CO 3 (10 mol%), cleanly affording six- and seven-membered 1,3-dioxo-2-silacycles with dihydrogen as the sole by-product. Conversely, 1,2-diols do not yield the expected 1,3-dioxo-2-silacyclopentanes, essentially forming cyclic disiloxanes instead. Aside from the synthetic convenience, the procedure
1,3- 和 1,4- 二醇和二氢硅烷的直接脱氢偶联由 Cs 2 CO 3 (10 mol%) 有效催化,干净地提供六元和七元 1,3-二氧-2-硅环与二氢作为唯一的副产品。相反,1,2-二醇不会产生预期的 1,3-二氧代-2-硅杂环戊烷,而是主要形成环状二硅氧烷。除了合成方便外,该程序本身也可用于 GLC 分析之前的直接二醇衍生化。