1: With chlorosulfonic acid in 1,2-dichloro-ethane T=20°C; 4 h; Heating / reflux; 2: With triethylamine; trichlorophosphate in 1,2-dichloro-ethane T=70°C; 2 h; Heating / reflux; 3: With ammonia in water; acetonitrile T=20°C; 2 h;

ammonia in tetrahydrofuran T=17 - 23°C; 16 - 36 h; Product distribution / selectivity;