Highly stereo- and regioselective palladium-catalyzed syntheses of (3E,Z)-,(3E,5E)-, and (3Z,5E)-1,3,5-undecatriene
作者:Bianca Patrizia Andreini、Massimiliano Benetti、Adriano Carpita、Renzo Rossi
DOI:10.1016/s0040-4020(01)86901-5
日期:1987.1
(3E,5Z)-1,3,5-Undecatriene () having 98.2% stereoisomeric purity has been prepared by a new and expeditious route involving two selective Pd-catalyzed carbon-carbon bond forming reactions. The key step of this synthesis is a highly diastereoselective Pd-catalyzed cross-coupling reaction between 1-heptynylzinc chloride () and a molar excess of (E)/(Z)-1,2-dibromoethylene (). Another highly diastereoselective
具有98.2%立体异构体纯度的(3E,5Z)-1,3,5-十一碳三烯()已通过涉及两个选择性Pd催化的碳-碳键形成反应的新的快速途径制备。该合成的关键步骤是1-庚炔基氯化锌()和摩尔过量的(E)/(Z)-1,2-二溴乙烯()之间的非对映选择性Pd催化的交叉偶联反应。另一个高度非对映选择性的Pd催化反应已用于制备(E)-1-三甲基甲硅烷基-3 ,该反应涉及三甲基甲硅烷基乙炔基氯化锌()与摩尔过量的1-溴-1-烯烃立体异构体混合物()之间的交叉偶联。-nonen-1-yne(),是合成(3E,5E)-和(3Z,5E)-1,3,5-十一碳三烯的关键中间体,()和()。从的精油中分离出来的化合物和也会与化合物一起出现在男性吸引海藻油中。这些物质具有在香水中高度赞赏的气味。