2-(2,4,6-trifluorophenyl)acetyl chloride

Conditions: temp:0.00; pressure:0.00; stir:

Conditions: temp:0.00; pressure:0.00; stir:

Conditions: temp:0.00; pressure:0.00; stir:

Conditions: temp:0.00; pressure:0.00; stir:; See reaction.notes.procedure_details.

Procedure: 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%). The resulting suspension was heated to reflux for 8 hours washed with water and brine the organic layer was dried over magnesium sulphate The solvent was evaporated

Conditions: temp:0.00; pressure:0.00; stir:; See reaction.notes.procedure_details.

Procedure: 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%). The resulting suspension was heated to reflux for 8 hours washed with water and brine the organic layer was dried over magnesium sulphate The solvent was evaporated

Conditions: temp:70.01; pressure:0.00; stir:; See reaction.notes.procedure_details.

Procedure: 5-Aminopyridazine-4-carboxylic acid ethyl ester (1.26 g, prepared according to J. Het. Chem., (1968), 5, 845) was dissolved in dry toluene (125 ml) at 90° C., and DMAP (0.92 g) was added. 2,4,6-Trifluorophenylacetyl chloride (1.75 g of 95% purity material) was added dropwise with stirring at 70° C., and a white solid precipitated. The reaction was stirred at reflux for 5 hours and then filtered hot. The filtrate was evaporated to give 5-[2-(2,4,6-trifluorophenyl)-acetylamino]-pyridazine-4-carboxylic acid ethyl ester as a white solid (2.6 g), m.p. 143-144° C. a white solid precipitated The reaction was stirred at reflux for 5 hours filtered hot The filtrate was evaporated

Conditions: temp:0.00; pressure:0.00; stir:; See reaction.notes.procedure_details.

Procedure: 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%). The resulting suspension was heated to reflux for 8 hours washed with water and brine the organic layer was dried over magnesium sulphate The solvent was evaporated