Heterocyclic Rearrangement of 4,5,6,7-Tetrahydro-6,6-dimethyl-benzo[c][1,2,5]oxadiazol-4-one (Z)-Arylhydrazones into Corresponding 2-Aryl-4,5,6,7-tetrahydro-2H-benzo[d][1,2,3]triazol-4-one Oximes

The thermal base‐catalysed and photochemical transformation (Boulton‐Katritzky rearrangement) of the title tetrahydrobenzo[c][1,2,5]oxadiazoles to tetrahydro‐2H‐benzo[d][1,2,3]triazoles is studied. Attempts to induce analogous rearrangement in tetrahydro‐2H‐benzo[d][1,2,3]triazol‐4‐one arylhydrazones or oximes failed. Some CNDO/2 calculation are also carried out.