An efficient and mild CuI/L-proline-catalyzed arylation of acetylacetone or ethyl cyanoacetate

The coupling reaction of aryl iodides with acetylacetone or ethyl cyanoacetate under catalysis of Cul/L-proline works at relatively mild conditions to provide 3-aryl-2, 4-pentanediones and u-aryl cyanoacetates in moderateto good yields.