Pyrrolo[1,2-a] thieno[3,2-f] [1,4]diazepines were obtained in an origi
nal one step synthesis by treatment of imines 1 with paraformaldehyde
in refluxing ethanol. The intermediate Mannich bases were also convert
ed into the thienooxadiazocines 12 and the diazepine N-oxide 13.