title: A novel system: 2H-pyrido[3,2-e]-1,2-thiazine-1,1-dioxide. Synthesis and properties of some derivatives.
abstract: A rearrangement of 2H-2-acetonyl(phenacyl)-4,6-dimethyl- pyrido[3,2-d]isothiazoline-3-one-1,1-dioxides (I), (II) to derivatives of the unknown system of 2H-pyrido[3,2-e]-1,2-thiazine-1,1-dioxide (V), (XIII) is described; the synthesis of 2-N-substituted derivatives (VI - XII), (XIV - XVI) is also given. The structures of the new compounds were confirmed with elemental analyses and spectral data (I.R., N.M.R., MS). Some of the newly obtained compounds showed strong analgesic activity upon pharmacological screening.
mesh_terms: D000700:Analgesics / Q000138:chemical synthesis* / Q000633:toxicity; D000818:Animals; D055598:Chemical Phenomena; D002621:Chemistry; D003499:Cyclic S-Oxides / Q000138:chemical synthesis / Q000494:pharmacology / Q000633:toxicity; D051379:Mice; D011725:Pyridines / Q000138:chemical synthesis* / Q000494:pharmacology / Q000633:toxicity; D051381:Rats; D013843:Thiazines / Q000138:chemical synthesis* / Q000494:pharmacology / Q000633:toxicity
chemical_list: D000700:Analgesics; D003499:Cyclic S-Oxides; D011725:Pyridines; D013843:Thiazines