A NOVEL AND HIGHLY EFFICIENT PROTOCOL FOR THE SYNTHESIS OF CHALCONE BASED 1,2-DIAZEPINE AND 1,2-OXAZEPINE DERIVATIVES

[摘要]：A novel and highly efficient protocol is described for the synthesis of chalcone based 1,2-diazepine and I,2-oxazepine derivatives. Under neat condition, the mixing and grinding of 1,5-diketones and hydrazine gave the cyclocondensation products in quantitative yields within 10-20 min at room temperature. Similarly, novel chalcone based 1,2-oxazepines were synthesized in excellent yields (85-88%) in 2-3 h at refluxed by the condensation of 1,5-diktones and hydroxylamine hydrochloride in water-ethanolic base.

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