An article Na2S-promoted reduction of azides in water: synthesis of pyrazolopyridines in one pot and evaluation of antimicrobial activity WOS:000465614900012 published article about BIOLOGICAL EVALUATION; PRIMARY AMINES; EFFICIENT; DERIVATIVES; REAGENT; INHIBITORS; CONVERSION; DISCOVERY; DESIGN; ACID in [Kale, Ashok; Medishetti, Nagaraju; Atmakur, Krishnaiah] Indian Inst Chem Technol, CSIR, Fluoro & Agro Chem Dept, Hyderabad 500007, Telangana, India; [Kanugala, Sirisha; Kumar, Ganesh C.] Indian Inst Chem Technol, CSIR, Med Chem & Pharmacol Div, Hyderabad 500007, Telangana, India; [Kale, Ashok; Medishetti, Nagaraju; Kanugala, Sirisha; Atmakur, Krishnaiah] Indian Inst Chem Technol, AcSIR, Hyderabad 500007, Telangana, India in 2019.0, Cited 48.0. Recommanded Product: 1-(4-Nitrophenyl)ethanone. The Name is 1-(4-Nitrophenyl)ethanone. Through research, I have a further understanding and discovery of 100-19-6
Reduction of various azides using Na2S has been accomplished in water, and, in situ, the resulting amines on reaction with various ketones lead to pyrazolo[3,4-b]pyridines in one pot. Thus, a number of new trifluoromethyl-substituted pyrazolo[3,4-b]pyridine compounds have been prepared and screened for antimicrobial activity against different Gram-positive and Gram-negative strains. A good number of compounds, 4a, 4b, 4d, 4f, 4i, 4k, 4l, 4m, 4r and 4s, were found to possess promising activity. Notably, Na2S on hydrolysis in water generates H2S and NaOH, which facilitate the reduction of azides followed by intramolecular cyclization leading to the title compounds. To the best of our knowledge, this is the first report of the synthesis of the title compounds in aqueous medium in a one-pot reaction.
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Reference:
Benzodioxan,
,1,4-Benzodioxane | C8H8O2 – PubChem