Total synthesis of (±)-carpesiolin (1) is described using a new and general synthetic route to helenanolide sesquiterpenes. The scheme includes the stereocontrolled introduction of the C-10 α-methyl group in the perhydroindanone (3) and its conversion to the perhydroazulenone (4) via the regiospecific ring expansion reaction.
报道了一种新的通用合成路线,用于合成(±)-carpesiolin (1),该路线用于合成海伦烯内酯
倍半萜。该方案包括在四氢
茚酮(3)中立体选择性地引入C-10 α-甲基基团,并通过区域特异性的环扩展反应将其转化为四氢茨菇酮(4)。