title: Synthesis and pharmacological properties of some 7H-[1] benzothiopyrano-[3,2-c] quinolin-7-ones.
abstract: The title compounds 3a-d were prepared by intramolecular cyclization of 2-[S-(quinolyl-4)]-thiobenzoic acids 2a-d. The effects of 3a-d on the central nervous system were tested. Among the investigated benzothiopyranoquinolinones, the 2-chloro-6-methyl-derivative (3c) showed analgesic activity in the hot-plate and the writhing tests in doses over 100 mg/kg. Among known, biologically active polycyclic heterocyclic systems [1], benzothiopyranoquinolinones with variously condensed heterocyclic rings, have received little attention. 7H-[1] Benzothiopyrano [3,2-c] quinolin-7-one (3a) is an example of one of the four possible isomers in such systems. In continuation of our search for new centrally active compounds [12], we report here the synthesis and characterization of the parent system 3a and its three derivatives 3b-d. Since some thioxanthene derivatives [9] are known to be neuroleptic drugs, and few known in literature compounds [2, 13, 20] derived from the 3a system have not been tested pharmacologically for the central nervous system activity, we decided to investigate the influence of [1]-benzothiopyranoquinolinones 3a-d on the central nervous system of mice. The results of pharmacological screening are presented in this paper.
mesh_terms: D006916:5-Hydroxytryptophan / Q000494:pharmacology; D000700:Analgesics; D000818:Animals; D000927:Anticonvulsants; D001522:Behavior, Animal / Q000187:drug effects; D055598:Chemical Phenomena; D002621:Chemistry; D004347:Drug Interactions; D006591:Hexobarbital / Q000494:pharmacology; D007928:Lethal Dose 50; D008297:Male; D051379:Mice; D009043:Motor Activity / Q000187:drug effects; D011714:Pyrans / Q000138:chemical synthesis / Q000494:pharmacology; D011804:Quinolines / Q000138:chemical synthesis* / Q000494:pharmacology; D012890:Sleep / Q000187:drug effects
chemical_list: D000700:Analgesics; D000927:Anticonvulsants; D011714:Pyrans; D011804:Quinolines; D006591:Hexobarbital; D006916:5-Hydroxytryptophan