The first route towards taiwaniaquinoid terpenes bearing an A/B trans-configuration has been developed through a sequence which includes a thermal 6Ï electrocyclization.
第一条通向具有A/B反式构型的台湾杉萜烯的合成路线已经通过一个包括热6π电环化的序列开发出来。
An enantiospecific route towards taiwaniaquinoids. First synthesis of (−)-taiwaniaquinone H and (−)-dichroanone
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.