Thermal and Photochemical Rearrangements of 3-Arylamino-2-phenyl-1H-inden-1-ones to N-Arylphthalimides
摘要:
Upon heating to above their melting temperatures, 3-arylamino-2-phenyl-1H-inden-1-ones and 2,2'-diphenyl-3,3'-bis(arylimino)[2,2'-biindan]-1,1'-dione undergo a skeletal rearrangement to afford N-arylphthalimides along with benzoic acid in the presence of atmospheric oxygen. The photoreaction of these compounds in acetonitrile also results in the formation of these products. The mechanism of the reactions, including the formation of a peroxyl radical followed by its conversion to a nitrogen-centered radical, is proposed.