Sm. Courtney et De. Thurston, A NEW CONVENIENT PROCEDURE FOR THE SYNTHESIS OF PYRROLO[2,1-C][1,4]BENZODIAZEPINES, Tetrahedron letters, 34(33), 1993, pp. 5327-5328
An efficient synthesis of the pyrrolo[2,1-c] [1,4]benzodiazepine (PBD)
ring system based on a new cyclisation procedure is reported. The par
ent unsubstituted PBD (4a) and the benzyl derivative (4b) of the natur
al product DC-81 (4c) have been synthesized to illustrate the utility
of this procedure.