Greener and regioselective ring opening of epoxides with TMSCN using potassium salts of magnetic carbon nitride

Abstract

Potassium salts of magnetic graphitic carbon nitride (Fe3O4@g-C3N4-K) synthesized and proved to be a green and recyclable catalyst for rapid and regioselective ring opening of epoxides with TMSCN, yielding the β-hydroxynitrile ring-opened products under mild reaction conditions. It is manageable to large-scale preparation with simple instruments and gives the desired compounds in short reaction times with good-to-excellent yields (73–95%) under solvent-free conditions. Magnetic separation protocol has used to achieve a simple separation and reuse of catalysts from unpurified reaction mixtures using external magnets without loss of catalytic operation after five cycles.