Ethyl 2-aminopyridine-3-carboxylate → 2-[2-(2,4,6-Trifluorophenyl)-acetylamino]-nicotinic acid ethyl ester

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Reaction Steps

2-Aminonicotinic acid ethyl ester (2.4 g) was suspended in dry toluene (50 ml). To the stirred suspension, 2,4,6-trifluorophenylacetyl chloride (3.0 g) in dry toluene (20 ml) was added. The resulting suspension was heated to reflux for 8 hours. The reaction mixture was cooled to ambient temperature, diluted with diethyl ether (100 ml), washed with water and brine, and the organic layer was dried over magnesium sulphate. The solvent was evaporated to give 2-[2-(2,4,6-trifluorophenyl)-acetylamino]-nicotinic acid ethyl ester as a yellow solid (4.5 g, 93%).

Provenance & Evidence