InBr3- and AgOTf-catalyzed beckmann rearrangement of (E)-benzoheterocyclic oximes
作者:Vishnu K. Tandon、Anoop K. Awasthi、Hardesh K. Maurya、Pushyamitra Mishra
DOI:10.1002/jhet.438
日期:2012.3
Beckmann rearrangement of (E)‐4‐chromanone oxime, (E)‐5‐oximino‐3,4‐dihydro‐1(2H)‐benzoxepines, and (E)‐5‐oximino‐3,4‐dihydro‐1(2H)‐benzothiepine are catalyzed by InBr3 and AgOTf in refluxing acetonitrile resulting in the formation of pharmaceutically active heterocycles benzoxazepin‐4‐one, 5‐oxo‐benzoxazocines, and 5‐oxo‐benzothiazocine derivative, respectively, in excellent yield. J. Heterocyclic