Regio-controlled Prenylation and Geranylation of 3-Furylmethylmagnesium Bromide. Selective Syntheses of 3-Substituted Furanoid and 2-Substituted 3-Methylfuranoid Terpenes
作者:Shuki Araki、Yasuo Butsugan
DOI:10.1246/bcsj.56.1446
日期:1983.5
main products. When the reactions were carried out in the presence of a catalytic amount of copper(I) iodide, normal coupling occurred and 3-substituted furans, perillene and dendrolasin, were formed in good yields. The related naturally occurring 3-substituted thiophene, 3-(4-methyl-3-pentenyl)thiophene, was also synthesized from 3-thienylmethylmagnesium bromide and prenyl diethy phosphate.
3-呋喃基甲基溴化镁与异戊二烯和香叶基磷酸二乙酯的偶联反应得到2-取代的3-甲基呋喃、蔷薇呋喃和倍半硅氧烷,作为主要产物。当反应在催化量的碘化铜 (I) 存在下进行时,会发生正常偶联,并以良好的产率形成 3-取代呋喃、紫紫苏烯和树皮苷。相关的天然存在的 3-取代噻吩,3-(4-甲基-3-戊烯基) 噻吩,也由 3-噻吩基甲基溴化镁和异戊二烯二乙基磷酸盐合成。