Solid structure analysis of unusual ureas with anti-cancer activities

ORGN 526

Kenneth D. Berlin, kdb@okstate.edu, Thanh C Le, and Stacy D. Benson. Department of Chemistry, Oklahoma State University, PS I, 422, Stillwater, OK 74078
[(4-Nitrophenyl)amino][(2,2,4,4-tetramethylthiochroman-6-yl)amino]methan-1-thione and the corresponding ethyl ester (in place of the nitro group) have exhibited strong anti-cancer activity against ovarian cancer cells. An X-ray analysis of the solid state of the nitro-substituted compound revealed that a linear relationship existed for the molecule rather than a stacking arrangement which could prevail since the system possesses an electron donating aryl unit (donor) and an electron withdrawing unit (acceptor). Physical and biological properties of the two molecules will be illustrated with emphasis on a structure-activity relationships.