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A simple and practical method has been developed for the synthesis of N-aryl/heteroarylphthalimides, bisphthalimides, 1,8-naphthalimides, and related derivatives. This method involves the reaction of various primary amines with different anhydrides, such as phthalic anhydride and 1,8-naphthalic anhydride, in the presence of a catalytic amount of mandelic acid in aqueous ethanol under reflux conditions. The use of less toxic solvents, excellent yields, shorter reaction times, elimination of column chromatographic purifications, and low-cost and naturally occurring catalysts are some of the major advantages of this developed protocol.
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