The Regiochemistry of the Protodesilylation of Some Cyclopropylmethylsilanes Derived from Allylsilanes
作者:Ian Fleming、Philip E. J. Sanderson、Nicholas K. Terrett
DOI:10.1055/s-1992-34186
日期:——
Simmons-Smith type methylenation of allylsilanes, followed by protodesilylation, can be used to achieve overall the SE2′ replacement of the silyl group by a methyl group. The regioselectivity is good for protonation on the methylene carbon of the cyclopropylmethylsilanes 11, 17, 20 and 23, but the low stereoselectivity in the formation of the cyclopropylmethylsilane 26 and its failure to undergo clean protodesilylation make the method of limited use.
烯丙基硅烷的 Simmons-Smith 型甲烯化反应,然后是原代硅烷化反应,可用于实现甲基基团对硅烷基团的 SE2′置换。环丙基甲基硅烷 11、17、20 和 23 亚甲基碳上的质子化具有良好的区域选择性,但形成环丙基甲基硅烷 26 的立体选择性较低,而且不能进行干净的原代甲硅烷基化,因此该方法的用途有限。