![Org Lett](/sites/default/files/styles/original_ratio_zero/public/2021-07/orlef7_v018i016.jpg?itok=QHj0HtrD)
A new approach to enantioselective haloetherification reactions via desymmetrization of in situ-generated meso-halonium ions is described. The combination of N-haloamides as a halogen source and sodium salts of chiral phosphoric acids as catalysts can be used for the cyclization of symmetrical ene-diol substrates, yielding the haloetherification products under practical conditions in enantioenriched form.