A convenient new method for the preparation of thionophosphine sulfides is described. These compounds undergo a modified FriedelLCrafts reaction with benzene and provide a route for the synthesis of unsymmetrical phosphinodithioic acids, unobtainable from reactions employing phosphorus pentasulfide (P&o).

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An improved procedure for preparing aliphatic thioamides, by the addition of hydrogen sulfide to nitriles at atmospheric pressure using amine catalysis, is presented. The ease of reaction was strongly dependent upon the solvent used, the chemical structure of the nitrile, and the nature and concentration of the amine catalyst.