FIELD: chemistry.
SUBSTANCE: described is a method of producing 5,6-dihydro-4H-benzo[f]pyrrolo[ 1,2-α][1,4]diazepin-6-one 1, involving moulding a pyrrolodiazepine frame as a result of reduction of nitro-groups of N-(2,5-dioxoalkyl)-2-nitrobenzamides 4, in acetic acid in the presence of iron while carrying out the reaction until boiling and holding for 60 minutes at room temperature. 
EFFECT: simultaneous formation of a pyrrole and a diazepine ring, and high output of end products owing to change in the sequence and conditions of the reaction.
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