Syntheses with sulfones XLVIII : stereoselective synthesis of 2-isopropyl 1,4-dienes through the iron-catalysed cross-coupling reaction of 2-benzenesulfonyl 1,4-dienes and isopropylmagnesium chloride
作者:E. Alvarez、T. Cuvigny、C. Hervé du Penhoat、M. Julia
DOI:10.1016/s0040-4020(01)85098-5
日期:1988.1
The stereoselective synthesis of 2-isopropyl 1,4-dienes through the cross-coupling reaction of 2-benseneaulfonyl 1,4-diene e and isopropylmagnesium chloride under transition-metal catalysis is described. Iron salts, which were better catalysis than palladium or nickel ones, led to substitution, of the sulfonyl group with > 97% stereospecifcity and without isomerisation of the isopropyl Grignard moiety
描述了在过渡金属催化下通过2-苯磺酰磺酰基1,4-二烯e和异丙基氯化镁的交叉偶联反应,对2-异丙基1,4-二烯进行立体选择性合成。铁盐比钯或镍具有更好的催化作用,可导致磺酰基取代,具有> 97%的立体比,且未将异丙基格氏部分异构化为正丙基衍生物。还形成了明显量的磺酰基还原所产生的化合物。