Methyl chloroformate → Methyl N-[4-[5-(3,5-dichlorophenyl)-5-trifluoromethyl-4,5-dihydro-isoxazole-3-yl]-2-methylbenzoyl]-N-(2,2,2-trifluoroethoxymethyl)carbamate

Participants

Reaction Steps

In a solution of 0.50 g of 4-[5-(3,5-dichlorophenyl)-5-trifluoromethyl-4,5-dihydro-isoxazole-3-yl]-2-methyl-N-(2,2,2-trifluoroethoxymethyl)benzoic acid amide in 10 mL of N,N-dimethylformamide, 0.0825 g of 60% oily sodium hydride was added under cooling with ice and with stirring, and stirred at room temperature for 10 minutes. Then, 0.268 g of methyl chloroformate was added, and continued to stir at the same temperature for 30 minutes. After the completion of the reaction, the reaction was poured in 50 mL of water, extracted with ethyl acetate (50 mL×1), the organic phase was dehydrated with and dried over saturated sodium chloride aqueous solution and then anhydrous magnesium sulfate, and the solvent was distilled off under reduced pressure. The residue was purified with silica gel column chromatography that was eluated with ethyl acetate-hexane (1:1) to obtain 0.07 g of the aimed product as colorless resinous substance.

Provenance & Evidence