Highly selective indirect anodic fluorination of organic compounds was successfully carried out for the first time by using a task-specific ionic liquid of iodoarene as a mediator in ionic liquid hydrogen fluoride salts.

Abstract:The electrochemical fluorination of organosulfur compounds in triethylamine/hydrofluoric acid (Et 3 N-5 HF) with polystyrene-supported iodobenzene (PSIB) and tetraethylammonium chloride (Et 4 NCl) was performed successfully in an undivided cell under constant current conditions to afford the corresponding fluorinated compounds in moderate to good yields. Recycle use of the PSIB could be achieved due to its easy separation. Notably, the mediatory activity of the iodobenzene derivative was not appreciably changed even after 10 recycle uses.

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