A stereoselective general synthetic approach to trachylobane-, beyerane-, and atisane-type polycyclic diterpenoids from carvone is described. Key steps in this approach are an IMDA reaction, an intramolecular diazo ketone cyclopropanation of an unsaturated ketone, and a controlled regioselective opening of a cyclopropyldiketone moiety.
描述了一种从
香芹酮出发,合成
三环二
萜类化合物(包括trahylobane型、beyerane型和atisane型)的立体选择性通用方法。该方法的关键步骤包括I
MDA反应、不饱和酮的分子内重
氮酮环丙烷化反应以及
环丙烷二酮部分的受控区域选择性开环反应。