Ullmann and Goldberg first reported the coupling of C−C and C−N bonds by copper complexes more than a century ago.(8) Thereafter, improvements and novel applications of C−N bond-forming reactions continually appeared in the literature.(9) Among them, the N-arylation of nitrogen-containing heterocycles has recently received particular attention. A variety of procedures are available for the N-arylation of pyrroles including the coupling of pyrroles with aryl halides in the ...
