title: Synthesis and pharmacological activity of 2-alkylthio substituted thieno[2,3-d]pyrimidine-4-one and 5H-pyrimido [5,4-b]indol-4-one.
abstract: Quaternary salts of several 2-alkylthio substituted derivatives of thieno [2,3-d]pyrimidin-4-one and 5H-pyrimido [5,4-b]indol-4-one with a basic group in position 2 of the alkyl chain were synthesized and screened for potential spasmolytic activity. These substances were prepared by condensation of the corresponding mercapto compounds with a 2-chloroalkyltertiary amine. The tertiary bases were quaternized with methyl iodide. Among the assayed compounds, the thieno [2-3-d]pyrimidin-4-one derivatives displayed a potent spasmolytic activity in the in vitro and in vivo assays.
authors.affiliation: Istituto di Chimica Farmaceutica e Tossicologica dell'Università di Catania, Italy.
authors.forename: F
authors.initials: F
authors.lastname: Russo
authors.forename: N A
authors.initials: NA
authors.lastname: Santagati
authors.forename: R
authors.initials: R
authors.lastname: Venturini
authors.forename: S
authors.initials: S
authors.lastname: Spampinato
mesh_terms: D000818:Animals; D001013:Aorta, Thoracic / Q000187:drug effects; D002606:Charcoal / Q000494:pharmacology; D055598:Chemical Phenomena; D002621:Chemistry; D006168:Guinea Pigs; D007082:Ileum / Q000187:drug effects; D066298:In Vitro Techniques; D007211:Indoles / Q000138:chemical synthesis* / Q000494:pharmacology / Q000633:toxicity; D008297:Male; D051379:Mice; D009119:Muscle Contraction / Q000187:drug effects; D009130:Muscle, Smooth / Q000187:drug effects; D009131:Muscle, Smooth, Vascular / Q000187:drug effects; D010276:Parasympatholytics / Q000138:chemical synthesis*; D011743:Pyrimidines / Q000138:chemical synthesis* / Q000494:pharmacology / Q000633:toxicity; D011744:Pyrimidinones / Q000138:chemical synthesis* / Q000494:pharmacology / Q000633:toxicity; D011817:Rabbits; D013876:Thiophenes / Q000138:chemical synthesis* / Q000494:pharmacology / Q000633:toxicity
chemical_list: D007211:Indoles; D010276:Parasympatholytics; D011743:Pyrimidines; D011744:Pyrimidinones; D013876:Thiophenes; D002606:Charcoal