A cross-coupling of aldehydes and α-trifluoromethyl alkyl bromides was developed via dual nickel/photoredox catalysis system. A wide variety of substrates bearing a diverse set of functional groups were compatible to afford α-trifluoromethyl ketones under very mild conditions (visible light, ambient temperature, no strong base). Selectively tunable access to these ketones with the trifluoromethyl group on any one side can be smoothly obtained by simply modulating different reagents. Meanwhile, the asymmetric pattern was also investigated.G iven the incorporation of a trifluoromethyl group into molecules can significantly change their lipophilicity, metabolic stability, and many other properties, 1 considerable achievements have been made in the development of novel synthetic routes to trifluoromethylated skeletons. 2 Among them, due to the great versatility of carbonyls, much attention has been paid to α-CF 3 carbonyl compounds. One of the most efficient and well-known protocols to deliver these types of products is electrophilic trifluoromethylation. 3 However, compared with the trifluoromethylation of aldehydes, 4 esters, 5 and amides, 6 the process with ketones faces many issues, especially for the ketones with two kinds of α hydrogen atoms which would lead to a mixture in the enolate process 7 (Scheme 1 top). Therefore, developing a high-selectivity and tunable method to afford the α-CF 3 ketones is still very practical and rewarding.Very recently, a cross-coupling of α-trifluoromethyl alkyl bromides and aryl halides to deliver benzylic trifluoromethylation products under dual nickel/photoredox catalysis system has been developed in our group. 8,9 Considering that