Herein, we disclose a mild and versatile nickel-catalyzed method for exclusive C3-selective thioetherification, alkylation, arylation, acylation, and phosphorylation of quinolines with a variety of electrophiles. Unactivated quinolines can be functionalized without directing groups at roomtemperature. Control experiments indicated that quinolines underwent 1,4-addition with nickel hydride species