Copper‐Catalyzed Chemoselective Synthesis of Pyrazolo‐Sulfonamide: Impact of Solvent on Nitro‐Pyrazole Reactivity
This study presents a copper‐catalyzed, solvent‐dependent method for the rapid and efficient synthesis of N ‐pyrazolo‐sulfonamides directly from nitro‐pyrazole and sulfonyl hydrazide under microwave conditions. The reaction exhibits notable solvent effects in pyrazole's reactivity. The ionic li...
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Published in: | European journal of organic chemistry |
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Language: | English |
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19-11-2024
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Abstract | This study presents a copper‐catalyzed, solvent‐dependent method for the rapid and efficient synthesis of N ‐pyrazolo‐sulfonamides directly from nitro‐pyrazole and sulfonyl hydrazide under microwave conditions. The reaction exhibits notable solvent effects in pyrazole's reactivity. The ionic liquid DBU‐AcOH triggered the reactivity of 4‐nitro‐pyrazole, whereas the reaction in PEG proceeded selectively at the 3‐ & 5‐positions of pyrazole. Key applications of this method include the gram‐scale synthesis of pyrazolo‐sulfonamide, sulfaphenazole analogue and sulfonamide nucleoside. |
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AbstractList | This study presents a copper‐catalyzed, solvent‐dependent method for the rapid and efficient synthesis of N ‐pyrazolo‐sulfonamides directly from nitro‐pyrazole and sulfonyl hydrazide under microwave conditions. The reaction exhibits notable solvent effects in pyrazole's reactivity. The ionic liquid DBU‐AcOH triggered the reactivity of 4‐nitro‐pyrazole, whereas the reaction in PEG proceeded selectively at the 3‐ & 5‐positions of pyrazole. Key applications of this method include the gram‐scale synthesis of pyrazolo‐sulfonamide, sulfaphenazole analogue and sulfonamide nucleoside. |
Author | Dutta, Swarnendu Jana, Rajarshi Das, Arka Bhowmik, Subhendu Sonar, Krutika Saha, Rana Gupta, Sreya |
Author_xml | – sequence: 1 givenname: Rana surname: Saha fullname: Saha, Rana organization: Department of Medicinal Chemistry National Institute of Pharmaceutical Education and Research 168 Maniktala Main Road Kolkata, West Bengal 700054 India – sequence: 2 givenname: Swarnendu surname: Dutta fullname: Dutta, Swarnendu organization: Department of Medicinal Chemistry National Institute of Pharmaceutical Education and Research 168 Maniktala Main Road Kolkata, West Bengal 700054 India – sequence: 3 givenname: Arka surname: Das fullname: Das, Arka organization: Department of Medicinal Chemistry National Institute of Pharmaceutical Education and Research 168 Maniktala Main Road Kolkata, West Bengal 700054 India – sequence: 4 givenname: Rajarshi surname: Jana fullname: Jana, Rajarshi organization: Department of Medicinal Chemistry National Institute of Pharmaceutical Education and Research 168 Maniktala Main Road Kolkata, West Bengal 700054 India – sequence: 5 givenname: Krutika surname: Sonar fullname: Sonar, Krutika organization: Department of Medicinal Chemistry National Institute of Pharmaceutical Education and Research 168 Maniktala Main Road Kolkata, West Bengal 700054 India – sequence: 6 givenname: Sreya surname: Gupta fullname: Gupta, Sreya organization: Department of Medicinal Chemistry National Institute of Pharmaceutical Education and Research 168 Maniktala Main Road Kolkata, West Bengal 700054 India – sequence: 7 givenname: Subhendu orcidid: 0000-0002-0313-6654 surname: Bhowmik fullname: Bhowmik, Subhendu organization: Department of Medicinal Chemistry National Institute of Pharmaceutical Education and Research 168 Maniktala Main Road Kolkata, West Bengal 700054 India |
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