Ethyl trifluoroacetate → N-[1-[1-(6-Chloro-3-pyridyl)ethyl]-2-pyridylidene]-2,2,2-trifluoroacetamide

Participants

Reaction Conditions

Reaction Steps

In a mixture solvent of 30 mL of dimethylformamide and 20 ml of toluene, 9.4 g (0.1 mol) of 2-aminopyridine was dissolved, and 28.4 g (0.2 mol) of ethyl trifluoroacetate was added thereto, followed by stirring at 60 to 65° C. for 8 hours. To the reaction liquid, 16.6 g (0.12 mol) of potassium carbonate powder and 16.2 g (0.1 mol) of 2-chloro-5-chloromethylpyridine were added, followed by stirring at 60 to 65° C. for 15 hours. To the reaction liquid, 15 mL of methanol was added, and then the reaction liquid was added to 120 mL of hot water of 50° C. After being cooled to room temperature, the mixture was stirred for 2 hours. The crystals were filtered, and washed with 50 mL of water and 100 mL of toluene. The obtained crystals were dried under reduced pressure at 45° C. Thus, 25.6 g of the target compound was obtained (Percentage Yield: 81.2%).

Provenance & Evidence