A novel and practical procedure for preparation of imides is described using chromium(VI) oxide to catalyze the oxidation of N-alkylamides with periodic acid in the presence of acetic anhydride in acetonitrile.
Liang Xu,a Suhong Zhangb and Mark L. Trudell. 2004. "Novel chromium(VI) catalyzed oxidation of N-alkylamides to imides with periodic acid." (2004). Chemical Communications: 1668 -1669