Hu H, Cai X, Xu Z, Yan X, Zhao S. Beckmann Rearrangement of Ketoxime Catalyzed by
N-methyl-imidazolium Hydrosulfate.
Molecules 2018;
23:molecules23071764. [PMID:
30021992 PMCID:
PMC6100402 DOI:
10.3390/molecules23071764]
[Citation(s) in RCA: 6] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/07/2018] [Revised: 07/03/2018] [Accepted: 07/14/2018] [Indexed: 11/21/2022] Open
Abstract
Beckmann rearrangement of ketoxime catalyzed by acidic ionic liquid-N-methyl-imidazolium hydrosulfate was studied. Rearrangement of benzophenone oxime gave the desirable product with 45% yield at 90 °C. When co-catalyst P2O5 was added, the yield could be improved to 91%. The catalyst could be reused three cycles with the same efficiency. Finally, reactions of other ketoximes were also investigated.
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