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Synthesis and antimicrobial assessment of new substituted 10H-phenothiazines, their sulfone derivatives, and ribofuranosides

Abstract A series of new 10H-phenothiazines, their sulfones, and ribofuranosides were synthesized and their in vitro antimicrobial assessment was carried out against a representative panel of Gram-positive and Gram-negative bacterial strains and selected fungi species. The 10H-phenothiazines were prepared using Smiles rearrangement. The sulfone derivatives were synthesized by oxidation of 10H-phenothiazines using 30% hydrogen peroxide in glacial acetic acid. The ribofuranosides were prepared by treatment of the phenothiazines with β-d-ribofuranosyl-1-acetate-2,3,5-tribenzoate.