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[1] Povarov reactions reter to the formal [4+2] cycloadditions of N-aryl imines with enol ethers or enamines. See reviews: a) L. S. Povarov, Russ. Chem. Rev. 1967, 36, 656; b) V. V. Kouznetsov, Tetrahedron 2009, 65, 2721. [2] D. Cheng, J. Zhou, E. Saiah, G. Beaton, Org. Lett. 2002, 4, 4411. [3] H. Richter, O. G. Mancheno, Org. Lett. 2011, 13, 6066. [4] T. Akiyama, H. Morita, K. Fuchibe, J. Am. Chem. Soc. 2006, 128, 13070. [5] H. Liu, G. Dagousset, G. Masson, P. Retailleau, J. Zhu, J. Am. Chem. Soc. 2009, 131, 4598. [6] L. He, M. Bekkaye, P. Retailleau, G. Masson, Org. Lett. 2012, 14, 3158. [7] A. M. Jadhav, V. V. Pagar, and Rai-Shung Liu, Angew. Chem. Int. Ed. 2012, 51, 11809. |