P. Frohberg et P. Nuhn, NEW SYNTHESES OF BENZOTRIAZEPINES BY NON-CONVENIENT CYCLIZATION REACTION OF N-1,N-3-DIARYLAMIDRAZONES, Heterocycles, 43(12), 1996, pp. 2549-2552
Reactions of derivatives of amidrazones with formaldehyde give triazol
e, triazoline and unexpected benzotriazepine derivatives. We examined
the effects of the substitution pattern of the N-3-aryl ring.