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1,2,4-Trisubstituted-(1 H )-imidazoles have been synthesized by the Cu(OTf) 2 - and I 2 -catalyzed unusual C–C bond cleavage of chalcones and benzylamines. After the α,β-unsaturated C–C bond cleavage, the β-portion is eliminated from the reaction. Various aryl- and heteroaryl-substituted chalcones and benzylamines were well tolerated in this unusual transformation to yield the trisubstituted-(1 H )-imidazoles.