O-Alkyl S-(N, JV-disubstituted-thiocarbamoyl)-thiocarbonates were studied by Cambrón0 and Lo25. Lo reported that these alkyl esters, except isopropyl ester, were unstable and decomposed even at room temperature. No report on the aryl esters of this thiocarbonic acid has been given. The present author succeeded in the synthesis of these aryl esters.