1: 77 percent / PCl5 / 2.5 h / 130 °C 2: 84 percent / conc. H2SO4 / 1 h / 60 - 65 °C 3: 79 percent / BF3-Et2O / ethanol / 1.) 60 deg C, 30 min; 2.) reflux, 16 h View Scheme

phosphorus pentachloride T=130°C; 2.5 h;

1: 77 percent / PCl5 / 2.5 h / 130 °C 2: 84 percent / conc. H2SO4 / 1 h / 60 - 65 °C View Scheme