Environmentally friendly Beckmann rearrangement of oximes catalyzed by metaboric acid in ionic liquids

Beckmann rearrangement of several oximes catalyzed by metaboric acid was studied in room temperature ionic liquids. Especially for conversion of cyclohexanone oxime into epsilon-caprolactam, excellent conversion and selectivity were obtained. (C) 2005 Elsevier B.V. All rights reserved.