I₂-Catalyzed Synthesis of Substituted Pyrroles from α-Amino Carbonyl Compounds and Aldehydes

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A direct method for the synthesis of 1,3,4-triarylpyrroles was achieved easily from cyclization of α-amino carbonyl compounds and aldehydes catalyzed by I2. Various substituted groups can be employed, and this reaction can proceed smoothly in moderate to good yields.