Ukrainets, Igor V.; Petrushova, Lidiya A.; Shishkina, Svitlana V.; Sidorenko, Lyudmila V.; Alekseeva, Tatiana V.; Torianyk, Inna I.; Davidenko, Alexandra A. published an article in 2020, the title of the article was Methyl4-hydroxy-2,2-dioxo-1H-2λ6,1-benzothiazine-3-carboxylate and its analogs modified in the benzene moiety of the molecule as new analgesics.Computed Properties of 89-77-0 And the article contains the following content:
In order to identify new regularities of the “structure-analgesic activity” relationship in the series of 2,1-benzothiazine derivatives, the synthesis of Me 4-hydroxy-2,2-dioxo-1H-2λ 6,1-benzothiazine-3-carboxylates I [R = H, 7-Cl, 6,8-di-Br, etc.] and a group of its analogs substituted in the benzene moiety of the mol., as well as their mono-and diammonium salts, was performed with tris(hydroxymethyl)aminomethane. The algorithm was proposed; it allowed for uniquely solving the question of the nature of the substituent and its true position in the benzothiazine core based on the complex use of NMR (1H and 13C) and mass spectrometry data. Using single-crystal X-ray diffraction anal. it was proven that salt formation first passed through the cyclic sulfamide group and only then through the 4-hydroxyl group and was always accompanied by a significant conformational rearrangement of the mol. Based on the results of pharmacol. tests it was found that modification of the benzene moiety of the mol. could be used as a method for enhancing the analgesic properties of the class of compounds studied. The presence of a substitute in position 7 was particularly effective, regardless of its nature. A comparative anal. of the analgesic activity of the initial esters and their mono- and diammonium salts convincingly showed that the common belief about a direct relationship between the solubility of a substance and the level of its biol. effect was not always true. As it turned out, increasing the solubility in water could lead to a variety of consequences: From a significant increase in analgesia to its complete elimination. It was suggested that the analgesic activity of the compounds studied was determined not by solubility, but by the mol. conformations formed during their obtainment. The experimental process involved the reaction of 2-Amino-4-chlorobenzoic acid(cas: 89-77-0).Computed Properties of 89-77-0
The Article related to methyl hydroxy dioxo benzothiazine carboxylate preparation analgesic, Heterocyclic Compounds (More Than One Hetero Atom): Thiazines and other aspects.Computed Properties of 89-77-0
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