Reactions of dithioxo-1,3,2λ5,4λ5-dithiadiphosphetanes with triorganolead derivatives

The reactions of Lawesson's reagent 1a and its 4-ethoxy homologue 1b with triethyl- and triphenyl(alkoxy)plumbanes 2a,b and -(alkylthio)plumbanes 4a,b were studied. On the basis of these reactions, novel, advantageous methods of synthesizing S-triethyl and triphenylplumbyl derivatives of aryldithio- and trithiophosphonic acids 3a–d and 5a,b were developed. © 1997 John Wiley & Sons, Inc.