A new and efficient synthesis of 2-arylbenzoxazoles and benzothiazoles using a copper N-heterocyclic carbene complex is described. In a simple protocol a variety of 2-substituted benzoxazoles and benzothiazoles were obtained via intramolecular coupling cyclization of 2-haloanilides/2-halothioanilides in good to excellent yields.
J. I. Urzúa, R. Contreras, C. O. Salas and R. A. Tapia, RSC Adv., 2016, 6, 82401 DOI: 10.1039/C6RA18510J
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