Cyanuric Chloride / Manganese Chloride Tetrahydrate Catalyzed Beckmann Rearrangement of Ketoximes
Tong Shen-Yue, Lu Jue-Lin, Li Xiao-Wen, NI Wan-Min, Xu Ke-Wei, Feng Qi
International Research Journal of Pure and Applied Chemistry · pp. 1–6 · Published 24 Jul 2019
10.9734/irjpac/2019/v19i230108Abstract
In order to find an efficient catalytic system for Beckmann rearrangement of ketoximes, cyanuric chloride and Lewis acids were screened, and the cyanuric chloride /manganese chloride tetrahydrate system with good catalytic effect has been discovered. Using 2 mol% cyanuric chloride and 2 mol% MnCl2·4H2O as catalyst, the yield of Beckmann rearrangement of benzophenone oxime was 96% after refluxing for 2 h in acetonitrile. A variety of ketoximes underwent the Beckmann rearrangement to afford the corresponding amides in moderate to high yields.
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