作者:Ajoy Kumar Banerjee、Héctor S. Hurtado、Manuel M. Laya、Julio C. Acevedo、Jaime G. Alvárez
DOI:10.1039/p19880000931
日期:——
A total synthesis of (±)-pisiferic acid (1) has been achieved by utilising the keto ether (22) which, in turn, was prepared from the alcohol (14). Subjection of the keto ether (22) to three sequential reactions (formylation, Michael addition with methyl vinyl ketone, and intramolecular aldol condensation) provided the tricyclic ether (27) whose conversion into the methoxyabietatriene (32) was accomplished
利用(酮)醚(22),由(14)醇制得的(±)-硫代磷酸(1)已完全合成。酮醚(的隶属22),以三个连续的反应(甲酰化,Michael加成与甲基乙烯基酮,和分子内羟醛缩合)中提供的三环醚(27),其转化为methoxyabietatriene(32)在四步被完成(ethoxycarbonylation,格氏反应与甲基锂,酸催化的脱水和甲氧基化反应)。甲氧基松香三烯(32)与锌,碘化锌和乙酸的反应生成的(±)-二十碳四烯酚(2),最后将其转化为(±)-吡啶甲酸(1)。完全按照将酮醚(22)转化为己二三烯(32)所采用的相同步骤,将酮(34)转化为己二烯三烯(41)。(41)的硼氢化-氧化,然后用Jones试剂氧化,再用氢化铝锂还原,然后环戊氧化,得到己二三烯(36)。