1: 4-nitro-aniline With hydrogenchloride; sulfuric acid; sodium nitrite in water T=5 - 65°C; 2: 2-amino-4-phenyl-1,3-thiazole With sodium carbonate in water T=0 - 5°C; pH=5 - 6; 2 h;

T=0°C;

in ethanol Heating;