Abstract
Abstract Ruthenium-catalyzed intermolecular [3 + 2] annulation pathway for aromatic acids with isocyanates to afford N-substituted phthalimide in one step is demonstrated, which provides an efficient process to direct preparation of phthalimide from commercially available starting materials and environmentally benign catalysts. This cascade cyclization involves the direct functionalization of an ortho C–H bond and the subsequent intramolecular nucleophilic substitution. There is no theoretical waste except for water generated in the reaction.
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