Allylsilanes derived from α- and β-ionone. Synthesis and unusual reactivity with electrophiles
作者:Elisabetta Azzari、Cristina Faggi、Nedo Gelsomini、Maurizio Taddei
DOI:10.1016/s0040-4039(01)93856-0
日期:1989.1
Silylcupration of α- and β-ionol acetates selectively gave the corresponding allylsilanes with direct substitution of the acetate with a trimethylsilyl group. Reactions of these products with electrophiles showed the unusual absence of the allylic shift, typical in nucleophilic condensations of allylsilanes. Ionotrimethylsilanes are effective building blocks for synthesis of terpenes and carotenoids
α-和β-紫罗兰醇乙酸酯的甲硅烷基选择性地产生相应的烯丙基硅烷,其中乙酸酯被三甲基甲硅烷基直接取代。这些产物与亲电试剂的反应表明,烯丙基硅烷的亲核缩合反应中通常不存在烯丙基位移。离子型三甲基硅烷是合成萜烯和类胡萝卜素的有效构件。