Lawesson's reagent in benzene 2 h; Heating;

1: 1.) sodium borohydride, tellurium, 2.) Adogen 464 / 1.) water, 40 deg C, 15 min, 2.) toluene, 50 deg C, 30 min, 2: 62 percent / dimer of (p-methoxyphenyl)thioxophosphine sulfide / benzene / 2 h / Heating View Scheme

1: 1.) sodium borohydride, tellurium, 2.) Adogen 464 / 1.) water, 40 deg C, 15 min, 2.) toluene, 50 deg C, 30 min, 2: 62 percent / dimer of (p-methoxyphenyl)thioxophosphine sulfide / benzene / 2 h / Heating View Scheme

1: 45 percent / Na2S2O5 / diethyl ether; H2O 2: 62 percent / dimer of (p-methoxyphenyl)thioxophosphine sulfide / benzene / 2 h / Heating View Scheme