Extension de la reaction de Wittig: Condensation “d'ylures enolates” sur les cetones aliphatiques
作者:C. Broquet
DOI:10.1016/s0040-4020(01)93522-7
日期:1973.1
the reaction of HMPT-Li with the benzoylmethylenetriphenylphosphorane Ph3PCHCOPh reacts with aliphatic ketones, in contrast to its precursor. This condensation makes it possible to prepare β,γ-unsaturated ketones, of type RCHC(R′)CH2COPh, instead of the α,β isomer usually obtained in a Wittig reaction.
HMPT-Li与苯甲酰基亚甲基三苯基膦烷Ph 3PphenylCHCOPh反应制得的烯醇盐内酯Ph 3 P + C - C(Ph)O - Li +与脂族酮反应,与其前体相反。该缩合使得能够制备β,γ不饱和酮,型RCHC(R')CH的2 COPh,代替α,β在维蒂希反应通常同分异构体而获得。