Pw. Ford et Bs. Davidson, SYNTHESIS OF VARACIN, A CYTOTOXIC NATURALLY-OCCURRING BENZOPENTATHIEPIN ISOLATED FROM A MARINE ASCIDIAN, Journal of organic chemistry, 58(17), 1993, pp. 4522-4523
The total synthesis of varacin (1), a cytotoxic metabolite isolated fr
om a marine ascidian, has been accomplished in 11 steps from vanillin,
providing unambiguous confirmation of the unique dopamine-related ben
zopentathiepin structure.