Reaction of Diphenylcyclopropenone with Nitroketeneaminals. Synthesis of 6-Amino-2-pyridones and Their m-Chloroperbenzoic Acid Oxidation to 2,3-Diphenylmaleimides
Reaction of diphenylcyclopropenone with nitroketeneaminals gave 6-amino-2-pyridones, which were oxidized by m-chloroperbenzoicacid to 2,3-diphenylmaleimides.