trichlorophosphate T=110°C; 3 h;

1.1: 84 percent / phosphoric trichloride / 2 h / Heating 2.1: butyllithium / toluene; hexane / 0.75 h / -75 °C 2.2: toluene; hexane / -75 °C 2.3: 73 percent / aq.HCl / H2O / pH 1 3.1: 83 percent / hydrogen; triethylamine / palladium on charcoal / methanol / 2 h / 25 °C / 760 Torr View Scheme

phosphorus tribromide T=150°C; 0.75 h;

1: 77 percent / phosphorus tribromide / 0.75 h / 150 °C 2: 72 percent / hydrazine monohydrate / ethanol View Scheme