Key points are not available for this paper at this time.
N-Acyl amino acids can be converted by oxidative decarboxylation induced by Ag+/Cu2+/S2O8 2- at room temperature in water into imides in 24-89% yields. Both N-benzoylvaline and N-benzoylleucine gave N-formylbenzamide, which possibly results from oxidative cleavage of an enamide intermediate.
Huang et al. (Fri,) studied this question.