Pentafluorophenyl-lithium has been treated with a number of halogeno-olefins of the type CXYCFZ (X, Y, Z, being F, Cl, Br or H). When the olefins were CF2CFCl and CF2CCl2 the products isolated were C6F5CFCFCl and C6F5CFCCl2 together with derivatives formed by nucleophilic attack of C6F5Li on the polyfluoroaryl ring. The orientation of this attack was shown by chemical and spectroscopic methods to be
五
氟苯基锂已用多种CXY CFZ类型的卤代
烯烃(X,Y,Z为F,Cl,Br或H)处理过。当
烯烃为CF 2
CFCl和CF 2 CCl 2时,分离的产物为C 6 F 5 CF
CFCl和C 6 F 5 CF CCl 2以及通过C 6 F 5 Li亲核攻击多
氟芳基环而形成的衍
生物。
化学和光谱学方法表明这种攻击的方向在4位。但是,如果
烯烃为
CFCl,
CFCl或CF 2形成CHCl,
氯五氟苯基
乙炔。当CF 2 CFH或CF 2 CFBr是
烯烃C 6 F 5 C CC 6 F 5时,会分离出其进一步的
五氟苯基取代的衍
生物,例如C 6 F 5– C 6 F 4 C CC 6 F 5。已经提出了一种机制来解释这些结果。还描述了溶剂和卤化
锂对反应过程的影响。