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