Stereospecific syntheses of sex pheromones of the californian red scale and white peach scale (Homoptera:Diaspididae) based on 1,4-cis-hydrogenation of dienes
作者:A. A. Vasil'ev、A. L. Vlasyuk、G. V. Kryshtal、E. P. Serebryakov
DOI:10.1007/bf00707233
日期:1995.10
Stereospecific syntheses of (±)-3-methyl-6-isopropenyl-3(Z),9-decadien-1-yl acetate and (±)-3,9-dimethyl-6-isopropenyl-3(Z),9-decadien-1-yl propionate (the Racemoc forms of the pheromones of the scalesAonidiella aurantii andPseudaulascaspis pentagona) with a geometrical purity of the (Z)-trisubstituted double bond not lower than 99 % were performed. The key step in both syntheses was the 1,4-cis-hydrogenation
(±)-3-甲基-6-异丙烯基-3(Z),9-癸二烯-1-基乙酸酯和(±)-3,9-二甲基-6-异丙烯基-3(Z),9-的立体有择合成进行了具有不低于 99% 的 (Z)-三取代双键几何纯度的 decadien-1-yl propionate(Aonidiella aurantii 和 Pseudaulascaspis pentagona 鳞片信息素的消旋形式)。两种合成中的关键步骤是相应的 3-甲基-6-(1, 1-亚乙基二氧乙基)-2,4,9-十碳三烯酸乙酯在羰基铬配合物的催化下进行 1,4-顺式氢化。这些 2,4-二烯是通过五个常规步骤获得的,包括乙酰乙酸乙酯通过适当的 1-溴-3-丁烯进行烷基化和相应 α-支化醛的 Horner-Emmons 烯化。