In a typical reaction, N-methyl-aniline (1) served as the C-H bond substrate, benzylidene malononitrile (2) was used as the radical acceptor, and ethyl thioglycolate (3) as HAT catalyst (table ). The reaction mixture was irradiated with a 3 W 400-405 nm LED bead at room temperature in a parallel photoreactor (fig. ). With 5 mg of CD-1 photo catalyst, moderate reactivity to the N-methly C-H bond was observed, forming corresponding product 4 with a 48% yield in acetonitrile (table ). The substrate to radical acceptor ratio was optimized, with the best result achieved using a 5-fold excess of N-methyl aniline (entry 7-9). Control experiments clearly showed the necessity of both CD photocatalyst and HAT catalyst (entry 10-16). Attempts to improve the reaction by using thiol acetic acid (3') HAT agent and other adducts did not provide good clues of further optimization.