1: 1,3-thiazole-2-carboxylic acid With 2-chloro-4,6-dimethoxy-[1,3,5]triazine in tetrahydrofuran T=0°C; 0.25 h; 2: With 4-methyl-morpholine in tetrahydrofuran T=20°C; 1.5 h; 3: O,N-dimethyl-hydroxylamine hydrochloride in tetrahydrofuran T=0 - 20°C;