nucleophiles with β-halogen-β-trifluoromethylstyrenes have been studied by 19F and 1H NMR monitoring and quantum-chemical calculations. In contrast to the mechanism proposed earlier for nucleophilic vinylic substitution of captodative carbonyl-bearing haloalkenes, this reaction proceeds via either E–Ad or Ad–E sequence depending on the nature of aromatic substituents of the parent styrenes.
通过19 F和1 H NMR监测以及量子
化学计算,研究了
氮亲核试剂与β-卤素-β-三
氟甲基苯乙烯反应的关键步骤。与早先提出的对带有羰基的羰基卤代
烯烃进行亲核
乙烯基取代的机理相反,根据母体
苯乙烯的芳族取代基的性质,该反应通过E-Ad或Ad-E序列进行。