ABSTRACT
The reaction of o-phenylenediamine with 3-cinnamoyl-4-hydroxy-6-methyl-2-pyrones (3a–i, chalcone analogs of dehydroactic acid) in ethanol-acetic acid provides a facile method for the synthesis of 3,4-dihydro-2-pyronyl-1,5-benzodiazepine derivatives (2a–i).
ACKNOWLEDGMENT
We are grateful to the UGC, New Delhi for financial assistance.