The enantiomers of methyl (E)-2,4,5-tetradecatrienoate (1), a component of the male pheromone of Acanthoscelides obtectus, were synthesized from the enantiomers of 1-undecyn-3-ol (6), which were obtained via asymmetric acetylation of (±)-1-trimethylsilyl-1-undecyn-3-ol (4) with vinyl acetate as catalyzed by lipase PS (Amano). The ortho ester Claisen rearrangement of 6 with triethyl orthoacetate was
甲基(对映体ë)-2,4,5- tetradecatrienoate(1),的阳信息素的组分Acanthoscelides obtectus,从1-undecyn -3-醇(对映体合成的6),将其通过获得
脂肪酶PS(Amano)催化(±)-1-三甲基甲
硅烷基-
1-十一炔-3-醇(4)与
乙酸乙烯酯的不对称乙酰化反应。用
原乙酸三乙酯将6的原酸酯Claisen重排是生成手性烯丙基体系的关键步骤。还从(±)-6开始执行了(±)-1的新合成。(2 E,4 Z)-2,4-癸二烯酸甲酯的三种不同合成方法(2),ob虫雄性信息素的另一种成分,是通过
钯催化的Heck反应或Claisen和Al 2 O 3催化的热重排而获得的。