Electrophilic fluorination of aromatic compounds with NF type reagents: kinetic isotope effects and mechanism
作者:Gennady I. Borodkin、Pavel A. Zaikin、Vyacheslav G. Shubin
DOI:10.1016/j.tetlet.2006.02.016
日期:2006.4
effects in fluorination of aromatic compounds with NF type reagents have been studied to reveal the reaction mechanism. The results obtained are consistent with a polar SEAr mechanism. Small deuterium isotope effects (kH/kD = 0.86–0.99) show that decomposition of a Wheland-type intermediate is not rate determining. The first example of a 1,2-hydrogen shift accompanying electrophilic fluorination of arenes
研究了用NF型试剂对芳族化合物进行氟化时的H / D同位素效应,以揭示其反应机理。获得的结果与极性S E Ar机制一致。小氘同位素效应(k H / k D = 0.86-0.99)表明,Wheland型中间体的分解不是决定速率的。在芳族化合物的1,3,5-三氟甲苯的氟化中已经观察到伴随芳族化合物的亲电氟化而发生的1,2-氢转移的第一个例子。