“…Recently, Jiang's group elaborated a photocatalytic three-component biheterocyclization of heteroatom-linked 1,7-diynes with CBrCl 3 and water as oxygen sources, leading to access of skeletally diverse fusedtricyclic heterocycles (Scheme 1C) (Wang et al, 2021). Intrigued by previous work and the continuation of our interest in radical cascade reactions (Wang et al, 2023a;Wang et al, 2023b;Wang et al, 2023c;Zhang et al, 2023), we believed that CCl 3 radical derived from BrCCl 3 under visible-light irradiation could add to preformed amide-linked 1,7-diynes followed by 6-exo-dig cyclization, 1,5-(S N ″)-substitution, and dehydrohalogenation to furnish versatile functionalized quinolin-2(1H)-ones. No construction of quinolin-2(1H)-ones bearing gem-dihaloalkenes starting from 1,7-diynes and perhalogenated methanes has been reported.…”