Design, synthesis and biological activity of A-C8/C-C2-linked 6-chloropurine-pyrrolobenzodiazepine hybrids as anticancer agents

New A-C8 and C-C2-linked 6-chloropurine-pyrrolo[2,1-c][1,4]benzodiazepine hybrids have been prepared and evaluated for their anticancer potential. The molecular modeling studies might be explained in terms of effect of the molecule on binding in the minor groove of DNA and also comparison to both A-C8/ C-C2-position of the PBD. These PBD conjugates have shown DNA-binding ability and promising anticancer activity.