3,4-Diaryl-4H-1,2,4-triazoles were obtained in good to comparable yields by the reaction of N-alkyl-N-phenylsulfonyl-N″-arylbenzamidrazones with sodium hydride. The reaction probably proceeds via the elimination of benzenesulfinic acid and the oxidative cyclization of N-alkylidene-N″-arylbenzamidrazones generated by the base-catalyzed isomerization of azo intermediates.
通过N-烷基-N-苯磺酰基-N″-芳基苯甲酰
肼与氢化
钠的反应,以良好至相当的产率得到了3,4-二芳基-4H-
1,2,4-三唑。该反应可能经过
苯亚磺酸的消除和由碱催化异构化中间体产生的N-亚烷基-N″-芳基苯甲酰
肼的氧化环化过程。