作者:Kazunori Hirabayashi、Eisuke Takahisa、Yasushi Nishihara、Atsunori Mori、Tamejiro Hiyama
DOI:10.1246/bcsj.71.2409
日期:1998.10
Alkenylsilanols are prepared by the reaction of hexamethyltrisiloxane (D3) with alkenyllithiums or alternatively by the reaction of cyclic siloxanes substituted by an alkenyl group with organolithiums and transformed to the corresponding cyclopropylsilanols using diiodomethane and diethylzinc. Lithium alkenylsilanolates, primary products of the preparation, also undergo cyclopropanation. As in the case of allylic alcohols, the silanol functionality is found to enhance the rate of cyclopropanation compared with that of alkenyltrialkylsilane or alkoxydialkylsilane. The obtained cyclopropylsilanols are further converted into the corresponding cyclopropanols by the Tamao oxidation.
烯基硅烷醇通过六甲基三硅氧烷(D3)与烯基锂反应制备,或者通过被烯基取代的环状硅氧烷与有机锂反应制备,并使用二碘甲烷和二乙基锌转化为相应的环丙基硅烷醇。制备的主要产物烯基硅烷醇锂也经历环丙烷化。与烯丙醇的情况一样,与烯基三烷基硅烷或烷氧基二烷基硅烷相比,发现硅烷醇官能团提高了环丙烷化的速率。获得的环丙基硅烷醇通过Tamao氧化进一步转化为相应的环丙醇。