TCCA-promoted solvent-free chemoselective synthesis of thiosulfonates on grinding

Trichloroisocyanuric acid (TCCA) is an inexpensive and efficient reagent for solvent-free chemoselective synthesis of thiosulfonates by grinding, providing a metal-free new methodology for the oxidation of disulfides. The important features of this method are that it is reasonably fast, very clean, high yielding, has a simple workup and is environmentally benign.