A new method for the synthesis of the 1,3-disilacyclohexane skeleton is established involving silylation of a dithioacetal followed by ringclosure with a base. The spiro-fused disilacyclohexane ring is shown to be structurally strain-free, like cyclohexane, on the basis of its X-ray analysis. The reaction mechanism involving a silacyclopropane intermediate is proposed.
建立了一种合成 1,3-二硅杂环己烷骨架的新方法,包括二硫缩醛的甲硅烷基化,然后用碱闭环。根据其 X 射线分析,螺稠合的二硅杂环己烷环在结构上与环己烷一样是无应变的。提出了涉及硅杂环丙烷中间体的反应机理。