A mixture of 0.222 g (1.2 mmole) of 3-fluoro-4-nitrobenzoic acid, 0.30 g (1.2 mmole) of 2-amino-4-(3-chloro-phenyl)-thiazole-5-carboxylic acid amide (V.2), 1.5 g (4.6 mmole) of cesium carbonate and 40 mL of dimethylformamide was stirred at 60 degrees for 16 hours. The mixture was cooled and poured into water. The dark mixture was made acidic by addition of hydrochloric acid, and the resulting orange precipitate was collected by filtration, washing, water to give 0.281 g of 3-[5-carbamoyl-4-(3-chloro-phenyl)-thiazol-2-ylamino]-4-nitro-benzoic acid (VI.10).
