Thermal 1,3-aroyl migration in 1 (α-aroyloxyarylideneamino) −1,2,3-triazoles †

Kinetic studies on the thermal rearrangement of the 1-(α-aroyloxyarylideneamino)-4,5-di-methyl-1,2,3-triazoles (II) to the corresponding diaroylimides (III) have shown that the 1,3-aroyl migration from oxygen to nitrogen proceeds in a concerted way and the isomerization reaction can be described as an [1,3] sigmatropic aroyl shift.

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