207ChemInform Abstract o-Phenylenediamine (I) reacts with dehydracetic acid (II) in the presence of the alcohols (III) to form the alkoxycarbonylmethylenebenzodiazepines (IV), together with the benzodiazepinone (V) and the benzimidazoles (VI) and (VII). (I) and (II) are coupled in xylene to produce mainly (V), together with (VII). Reaction of (II) with excess (I) yields the bisadduct (VIII) which is hydrolyzed to give the benzodiazepinone (IX).
Synthesis of New Heterocycles Containing Pyrazole. -Acetoacetylpyrazole (I) derived from dehydroacetic acid appears to be a useful synthon for the preparation of new heterocyclic systems containing a pyrazole moiety [cf. (III), (V), (VII), (IX)]. -(DJERRARI, B.; FIFANI, J.; AHABCHANE, N. H.; ESSASSI*, E. M.; GARRIGUES, B.; PIERROT, M.; Indian J.
The title compound, C(14)H(16)N(2)O(2), contains a diazepine ring, which appears in a boat conformation. An intramolecular hydrogen bond is formed between the NH group of the diazepine ring and a carbonyl O atom of one of the side chains.
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