Diaryl Ether Synthesis in Supercritical Carbon Dioxide in Batch and Continuous Flow Modes.

A high yielding, batch mode synthesis of diaryl ethers and sulfides by an SNAr fluoride-mediated process in scCO2 has been developed; the use of a polymer-supported imidazolium fluoride reagent in batch mode led to the development of a fixed-bed continuous flow process, with high conversions.