A. Daich et al., A NOVEL PRACTICAL SYNTHESIS OF PYRROLO[1,2-A]THIENO[2,3-E][1,4]DIAZEPINES, Journal of heterocyclic chemistry, 30(3), 1993, pp. 675-678
In an investigation of new heterocyclic systems, a novel way to obtain
pyrrolo[1,2-a]thieno[2,3-e][1,4]diazepine 8 was effected by ring clos
ure to the appropriate nitroaldehyde compound which was synthesized in
five steps from 3-bromomethyl-2-nitrothiophene 1.