title: Synthesis, spectral characterization, and pharmacological importance of new 4H-1,4-benzothiazines, their sulfone analogues, and ribofuranosides.
abstract: The present article describes the synthesis of new 4H-1,4-benzothiazines via condensation and oxidative cyclization of substituted 2-aminobenzenethiols with compounds containing active methylene groups. It is believed that the reaction proceeds via intermediary of the enaminoketone system. The sulfone derivatives were synthesized by oxidation of 4H-1,4-benzothiazines using 30% hydrogen peroxide in glacial acetic acid. Benzothiazines were used as bases to prepare ribofuranosides by treatment with a sugar derivative (β-D-ribofuranosyl-1-acetate-2,3,5-tribenzoate). The pharmacological importance of the synthesized compounds was evaluated by their, antimicrobial properties against various bacterial strains and fungal species. The structures of the compounds have been confirmed by spectral and chemical analysis.
authors.affiliation: a Lal Bahadur Shastri Government P.G. College, Kotputli , Jaipur , Rajasthan , India.
authors.forename: Naveen
authors.initials: N
authors.lastname: Gautam
authors.forename: Ankita
authors.initials: A
authors.lastname: Garg
authors.forename: Dinesh Chand
authors.initials: DC
authors.lastname: Gautam
mesh_terms: D000900:Anti-Bacterial Agents / Q000138:chemical synthesis; D000935:Antifungal Agents / Q000138:chemical synthesis; D005663:Furans / Q000138:chemical synthesis* / Q000737:chemistry; D013450:Sulfones / Q000138:chemical synthesis* / Q000737:chemistry; D013843:Thiazines / Q000138:chemical synthesis / Q000737:chemistry*
chemical_list: C446962:1,4-benzothiazine; D000900:Anti-Bacterial Agents; D000935:Antifungal Agents; D005663:Furans; D013450:Sulfones; D013843:Thiazines
keywords: 4H-1,4-benzothiazines; antimicrobial properties; pharmacological importance; ribofuranosides; sulfones