STUDIES ON ORGANOPHOSPHORUS COMPOUNDS, PART XVI.¹ THE REACTION OF 1,3,2,4- DITHIADIPHOSPHETANE-2,4-DISULFIDE WITH BENZIL DIANILS. A NOVEL SYNTHESIS OF 2H-1,3,6,2-THIADIAZAPHOSPHORINE-2-SULFIDE DERIVATIVES

Abstract

1,3,2,4-Dithiadiphosphetane-2,4-disulfide (Lawesson reagent, 1a) and its p-phenoxy derivative, 1b react with benzil dianils 2ab, in refluxing toluene to give 2H--1,3,6,2-thiadiazaphosphorine-2-sulfide derivatives of type 3a-c. Compatible analytical and spectroscopic results were obtained for the new compounds. A mechanism is proposed to explain the formation of compounds 3a-c.