ammonia in methanol; water 1 h; Heating / reflux;

1: 2-bromo-1,3-thiazole With isopropylmagnesium chloride lithium chloride complex; zinc(II) chloride in tetrahydrofuran T=25°C; Inert atmosphere; 2: trichloromethylcarbonyl isocyanate in tetrahydrofuran T=-20 - 25°C; Inert atmosphere; 3: With methanol; potassium carbonate in tetrahydrofuran T=25°C; 12 h; Inert atmosphere;

ammonia; chloroformic acid ethyl ester

hydrogenchloride (electrolysis);

phosphorus pentoxide

in ethanol (electrolysis);

hydrogenchloride (electrolysis);