An enantiospecific route towards taiwaniaquinoids. First synthesis of (−)-taiwaniaquinone H and (−)-dichroanone
作者:Enrique Alvarez-Manzaneda、Rachid Chahboun、Eduardo Cabrera、Esteban Alvarez、Ali Haidour、Jose Miguel Ramos、Ramón Alvarez-Manzaneda、Yahia Charrah、Hakima Es-Samti
DOI:10.1039/b916209g
日期:——
A new methodology for the enantiospecific synthesis of taiwaniaquinoids, based on a thermal 6Ï electrocyclization, is reported. Under this procedure, 4a-methylhexahydrofluorene terpenoids bearing an A/B trans-configuration has been prepared for the first time. This methodology also makes it feasible to synthesize taiwaniaquinoids with an A/B cis-configuration and 4a-methyltetrahydrofluorene terpenoids. Accordingly, the first synthesis of (â)-taiwaniaquinone G, (â)-taiwaniaquinone H and (â)-dichroanone has been achieved.
报道了一种基于热6π电环化反应的新方法,用于手性特异性合成taiwaniaquinoids。在这种方法下,首次制备了具有A/B反式构型的4a-甲基六氢芴萜类化合物。该方法还使得合成具有A/B顺式构型的taiwaniaquinoids和4a-甲基四氢芴萜类化合物成为可能。因此,首次实现了(−)-taiwaniaquinone G、(−)-taiwaniaquinone H和(−)-dichroanone的合成。