Synthesis of 1-(heterocyclic substituted anilino)-9H-thioxanthon-9-ones and their antitumor activity

Some new 9H-thioxanthen-9-one incorporated into heterocyclic systems such as pyridone8, pyrazoline9, pyranone11, iminopyrane12, furopyrimidine17, imidazothiazole19, thiazole21, triazine24 and other related compounds through a para imminophenyl grouping at position-1 of the thioxanthenone ring were synthesized and tested as antitumor agents, against L 1210 leukemia in mice. Some of the new compounds showed considerable antitumor activity.