The Optically Active Phosphinodithioates. Synthesis and Conversion to the Optically Active Phosphine Sulfides

Abstract The optically active phosphinodithioates were prepared by the reaction of the corresponding phosphinothioates with Lawesson’s reagent in high chemical and optical yields, and were allowed to react with n-BuLi, followed by treatment with the electrophiles to give the corresponding optically active secondary or tertiary phosphine sulfides.