作者:M.L. Roumestant、P. Place、J. Gore
DOI:10.1016/0040-4020(77)84075-1
日期:1977.1
Vinylallenic Grignard reagents prepared from 5-halogeno alk-3-ene-1-ynes react with acyclic conjugated aldehydes and ketones leading exclusively to 4-ethynyl hexa 1,5-diene 3-ols 5; with cyclohexénone and other ketones having more extended conjugation, the same alcohol 5 is still the major product but isomeric ketones and alcohols are also obtained resulting from the intervention of the two other nucleophilic
由5-卤代烷-3-烯-1-炔制备的乙烯基烯格利雅试剂与无环共轭醛和酮反应,仅生成4-乙炔基六1,5-二烯3-醇5;在环己烯酮和其他酮的共轭作用更广泛的情况下,相同的醇5仍是主要产物,但由于试剂的另外两个亲核位点的介入,也获得了异构体酮和醇。醇5通过在二甘醇二甲醚中的溶液回流或通过在加热至350°的柱上快速蒸馏而容易地异构化为δ-烯属ξ-炔醛和酮6。