Abstract Flash vacuum pyrolysis of 3-alkyl-4-methylene-1, 2, 3-benzotriazines gives products derived from benzocyclobutane N-alkylimines and to a lesser extent from 2- methylene-benzazetidines. Benzocyclobutane N-phenylimine is formed in high yield by flash pyrolytic elimination of HCI from N-phenyl-2-methyl benzimidoyl chloride.
![3-ethyl-4-methylene-3,4-dihydro-benzo[d][1,2,3]triazine结构式](https://image.chemsrc.com/caspic/125/59225-67-1.png)
