An efficient carbo-acylation reaction of 2-arylpyridines with α-diketones via Pd-catalyzed C–H bond activation and C–C bond cleavage in the presence of TBHP was developed that generated aryl ketones in good yields. The highly selective formation of aryl ketones was observed when 2-arylpyridines reacted with aromatic/aliphatic α-diketones