A novel and facile copper-catalyzed 5-endo-trig cyclization of ketoxime carboxylates for the synthesis of 2-arylpyrroles has been developed. The reaction tolerates a range of functional groups and is a practical procedure for rapid synthesis of 2-arylpyrroles in high yields under mild conditions.
W. Du, M. Zhao, Z. Ren, Y. Wang and Z. Guan, Chem. Commun., 2014, 50, 7437 DOI: 10.1039/C4CC03129F
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