quinolines with styrenes and that of a C5Me4H-ligated yttrium catalyst Y-2 for the reaction with aliphatic olefins exclusively afforded the corresponding C8-H alkylation products, thus constituting the first example of direct C8‒H alkylation of neutral quinolines. In contrast, the Sc-3-catalyzed reaction of 2-aryl quinolines with aliphatic olefins and the Y-2-catalyzed reaction with styrenes selective-ly