2-Pyrimidinamine, 5-chloro- → N-(5-chloro-2-pyrimidinyl)-4-[5-(3,5-dichlorophenyl)-5-trifluoromethyl-4,5-dihydro-isoxazol-3-yl]-2-methyl benzoic acid amide

Participants

Reaction Steps

In a solution of 3.86 g of 2-amino-5-chloropyrimidine in 100 mL of pyridine, 10.0 g of 4-[5-(3,5-dichlorophenyl)-5-trifluoromethyl-4,5-dihydroisoxazol-3-yl]-2-methylbenzoyl-chloride synthesized in Step 4 of Synthetic Example 1 was added at room temperature with stirring, and stirred at the same temperature for 23 hours. The solvent was distilled off under reduced pressure, the residue was dissolved in 30 mL of 1,4-dioxane, a solution of 3.02 g of potassium hydroxide in 20 mL of water was added and stirred at room temperature for 1.5 hour. After the completion of the reaction, the reaction mixture was diluted with 380 mL of water, precipitated crystal was filtered off, and washed with 150 mL of water. The resulting crude product was dissolved in 50 mL of ethyl acetate with heating, and 50 mL of 2N hydrochloric acid was added and stirred for 1 hour, and then 50 mL of toluene was added, and precipitated crystal was filtered off. Thereafter, the reaction mixture was washed with 50 mL of water, and then with 50 mL of toluene to obtain 7.95 g of the aimed product as white crystal.

Provenance & Evidence