1: aniline With hydrogenchloride; sodium nitrite in water T=0 - 5°C; 2: 3-(4-methoxyphenyl)-2-thioxo-1,3-thiazolidin-4-one With sodium acetate; potassium hydroxide in ethanol; water T=0 - 5°C; pH=10 - 12;

1.1: water / Heating 2.1: hydrogenchloride; sodium nitrite / water / 0 - 5 °C 2.2: 0 - 5 °C / pH 10 - 12 View Scheme