Reactions of mesomeric fluorocarbanions with acid anhydrides. Transformation of trifluoromethyl groups into fluorocarbonyl and perfluoroacyl groups
作者:A.Yu. Volkonsky、E.M. Rokhlin
DOI:10.1016/s0022-1139(00)80922-7
日期:1984.10
It was found that the reaction of mesomeric fluorocarbanions of the CF3XCOY type with benzoic anhydride leads to the loss of benzoyl fluoride and the formation of mesomeric carbanions of the FCOXCOY type. In a similar reaction with perfluorocarboxylic acid anhydrides, besides a CF3→COF transformation, further change of COF into CORF is observed, leading to the formation of salts containing mesomeric
已经发现,CF 3 XCOY型的中观氟碳负离子与苯甲酸酐的反应导致苯甲酰氟的损失和FCO XCOY型的中观碳负离子的形成。在与全氟羧酸酐类似的反应中,除了CF 3 →COF转化外,还观察到COF进一步转变为COR F,导致形成了含R F CO XCOY型中消旋阴离子的盐,酸化后可得到1,1-双(全氟酰基)-2,2,2-三氟乙烷CF 3 CH(COR F)2,三(全氟酰基)甲烷(R F CO)3CH和双(三氟乙酰基)-乙酸酯(CF 3 CO)2 CHCOOMe。已经显示,尽管β-二酮和β,β′-三酮中的全氟烷基具有电子吸引作用,但它们仍可能阻碍烯醇化。