Zinc(II)-Catalyzed Synthesis of Secondary Amides from Ketones via Beckmann Rearrangement Using Hydroxylamine-O-sulfonic Acid in Aqueous Media
Saumya Verma, Puneet Kumar, Anil K. Khatana, Dinesh Chandra, Ajay K. Yadav, Bhoopendra Tiwari, Jawahar L. Jat*
*Department of Chemistry, Babasaheb Bhimrao Ambedkar University (A Central University), Lucknow, India, Email: jawaharljbbau.ac.in
S. Verma, P. Kumar, A. K. Khatana, D. Chandra, A. K. Yadav, B. Tiwari, J. L. Jat, Synthesis, 2020, 52, 1841-1846.
DOI: 10.1055/s-0040-1707809 (free Supporting Information)
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Zinc(II) catalyzes a single-step protocol for the Beckmann rearrangement using hydroxylamine-O-sulfonic acid (HOSA) as the nitrogen source in water. This environmentally benign and operationally simple method efficiently produces secondary amides under open atmosphere in a pure form after basic aqueous workup.
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S. Munnuri, S. Verma, D. Chandra, R. R. Anugu, J. R. Falck, J. L. Jat, Synthesis, 2019, 51, 3709-3714.