phosphorus trichoride in chloroform 2 h; Heating;

1: 64 percent / (CH3CO)2O, 30percent H2O2 / 12 h / 80 °C 2: 44 percent / conc. H2SO4/H2SO4 (20percent SO3) (1:1); H2SO4 (20percent SO3)/100percent HNO3 / 1 h / Heating 3: 36 percent / PCl3 / CHCl3 / 2 h / Heating View Scheme

1: 44 percent / conc. H2SO4/H2SO4 (20percent SO3) (1:1); H2SO4 (20percent SO3)/100percent HNO3 / 1 h / Heating 2: 36 percent / PCl3 / CHCl3 / 2 h / Heating View Scheme

sodium in methanol 3 h; Heating;