研究了在对位具有碱性氮取代基的全氟苯基卤化物与卤化氢水溶液的反应中,用氢置换了卤素取代基。对卤代N,N-二甲基全氟苯胺与各种卤化氢的反应行为以及对卤代全氟苯基三甲基铵三氟甲磺酸盐与亲核试剂和电子转移剂的反应行为表明,在酸性介质中脱卤加氢有两种可能的反应机理:通过正卤素的反应路线亲核进攻卤素取代基(S N X过程),以及电子转移和单分子消除卤离子(S RN)1个过程)。发现芳族环上的铵基和全氟取代对于进行这种脱卤代氢是必不可少的。
Reactions of HMPA with hexafluorobenzene, pentafluorochlorobenzene and pentafluorophenol
作者:Cheng-Pan Zhang、Qing-Yun Chen、Ji-Chang Xiao
DOI:10.1016/j.jfluchem.2008.02.005
日期:2008.5
Hexamethylphophoramide (HMPA) reacted with hexafluorobenzene and its derivatives with good conversion to give dimethylaminated products and phosphorofluoridates, even in unfavorable reaction stoichiometries. An aromatic nucleophilic mechanism might be involved.