The electrophilic organofluorophosphonium catalyst [(C6F5)3PF][B(C6F5)4] is shown to effect benzylation or alkylation by aryl and alkyl CF3 groups with subsequent hydrodefluorination, thus resulting in a net transformation of CF3 into CH2–aryl fragments. In the case of alkyl CF3 groups, Friedel–Crafts alkylation by the difluorocarbocation proceeded without cation rearrangement, in contrast to the corresponding
亲电子性有机
氟phosph催化剂[(C 6 F 5)3 PF] [B(C 6 F 5)4 ]显示出通过芳基和烷基CF 3基团进行苄基化或烷基化,随后进行加氢脱
氟,从而导致CF的净转化3成CH 2-芳基片段。在烷基CF 3基团的情况下,与烷基单
氟化物的相应反应相反,通过二
氟碳羰基化进行的Friedel-Crafts烷基化反应没有阳离子重排。