Fig. 3: Substrate scope in the synthesis of carbonimidic difluorides and their defluorination reactions.

Reaction conditions: ^a4 (0.2 mmol), IMADF-1 (0.3 mmol), fac-Ir(ppy)₃ (0.006 mmol), 30 W blue LED, 2 h under Ar, then added secondary amine (0.3 mmol), triethylamine (0.3 mmol). ^bThe ratio of E/Z isomers was determined by NMR. ^c0.5 mmol IMADF-1 was used and stirred for 5 h. ^d The ratio of E/Z isomers was determined through isolated yield. ^epyrrole sodium salt as nucleophile. ^f The ratio of p1/p2 isomers was determined by NMR. ^gsilica gel (200 mg) as nucleophile and corresponding urea 7a’ was isolated. ^hNa₂S (0.4 mmol) as nucleophile. ⁱNa₂Se (0.4 mmol) as nucleophile.