The straightforward preparation and resolution of phosphorothioates and phosphorothioamidates from 1,1′-biphenyl-2,2′-diol 1 and 1,1′-binaphthalene-2,2′-diol 2 are described. Basic alcoholysis of phosphorothioamidate of 1,1′-binaphthalene-2,2′-diol 6b and 6c is highly stereoselective and gives only one diastereomer.