1: 2-amino acetophenone With hydrogenchloride in 1,4-dioxane T=-10 - 25°C; 2: chloroacetonitrile in 1,4-dioxane T=-10 - 2°C; 3 h; 3: With sodium hydroxide in 1,4-dioxane; water T=5 - 11°C;

phosphorus trichoride in chloroform Heating / reflux;

trichlorophosphate 0.5 h; Heating;

potassium carbonate in 1-methyl-pyrrolidin-2-one T=75°C; 6 h;