Palladium-Catalyzed Coupling of<i>N</i>-Aminoazoles with 3-Halo-Substituted Quinolin-2(1<i>H</i>)-ones, Coumarins, Quinoxalin-2(1<i>H</i>)-ones, and Chromenes
An efficient and general palladium-catalyzedcoupling of 3-bromoquinolin-2(1H)-ones, 3-bromocoumarins, 3-chloroquinoxalin-2(1H)-ones, and 3-iodo-2H-chromenes with a variety of 1-aminoazoles is described. The reaction proceeds cleanly in the presence of the Pd(OAc)2/4,5-bis(diphenylphosphino)-9,9-dimethylxanthene (Xantphos) catalytic system to provide the coupling products in good to excellent yields