An enantiospecific synthesis of the angular triquinane system present in the sesquiterpenes cameroonanes and silphiperfolanes has been accomplished, starting from 5-isopropenyl-2-methylcyclopent-1-ene-1-methanol [readily available in three steps from (R)-limonene] employing an intramolecular rhodium carbenoid insertion into the C-H bond of a tertiary methyl group for the construction of the triquinane system.
倍半萜喀麦隆烷和 silphiperfolanes 中存在的角三奎烷系统的对映特异性合成已经完成,从 5-异
丙烯基-2-甲基环戊-1-烯-1-
甲醇开始[可通过 (R)-
柠檬烯通过三个步骤轻松获得],采用将分子内
铑类
胡萝卜素插入叔甲基的 C-H 键以构建三奎烷系统。