PHOTOCHEMICAL STUDIES OF A NEW GROUP OF ISOIMIDES

Several stable isoimides have been prepared by acylation of O-benzyl-4 -nitro-, O-(1-propyl)-, O-(1-propyl)-4-nitro-, O-benzyl-4-chloro-, and O-allyl-4-chlorobenzohydroxamic acids in pyridine which acted both as a solvent and a weak base. As acyl halides were used methanesulfonyl, 4-toluenesulfonyl, 4-methylbenzoyl, and 4-nitrobenzoyl chlorides. The resulting mixed anhydrides were characterized by chemical and spectro scopic methods. Thermal as well as photochemical rearrangement of the mixed anhydrides has been attempted. Structure elucidation of the rear ranged products was performed by spectroscopic methods.