作者:Alexander J. Villani-Gale、Chad C. Eichman
DOI:10.1002/ejoc.201600531
日期:2016.6
arenes and 2,2-dimethylchromans using a Friedel–Crafts-type coupling between activated arenes and isoprene is reported. A combination of catalytic amounts of FeCl3 and AgBF4 promotes a regioselective prenylation event followed by a cyclization to form a 2,2-dimethylchroman structure. The method avoids isoprene polymerization and allows the facile late-stage derivatization of biologically active motifs.
报道了使用活化芳烃和异戊二烯之间的 Friedel-Crafts 型偶联合成异戊二烯化芳烃和 2,2-二甲基色满。催化量的 FeCl3 和 AgBF4 的组合促进了区域选择性异戊二烯化事件,然后环化形成 2,2-二甲基色满结构。该方法避免了异戊二烯聚合,并允许生物活性基序的后期衍生化。