DC-81 , an antitumor antibiotic produced by streptomyces species, belogs to the pyrrolo[2,1-c][1,4]benzodiazepines (PBDs) which are potent inhibitors of nucleic acid synthesis and block DNA transcription. They bind selectively in the minor groove of DNA forming a covalent aminal bond between the C11 position of the central B-ring and the N2 amino group of a guanine base. This adduct formation is thought to lead to the observed biological activity. Recently, we reported a very short route and large scale synthesis of PBD. In this dissertation, we extended our studies to oxygen group incorporated at C-ring of PBD. Biological test showed that these drugs have highly anticancer activity.