反应详情

First, 0.15 g of 3-(4-chloro-2-fluoro-5-hydroxyphenyl)-1-methyl-6-trifluoromethyl-2-oxo-1,2-dihydropyrazine (present compound 1-61) was dissolved in 0.50 ml of N,N-dimethylformamide, to which 97 mg of potassium carbonate and 48 μl of methyl bromoacetate were added, and the mixture was stirred at room temperature for 1 hour. After completion of the reaction, the reaction mixture was poured into water, followed by extraction with ethyl acetate. The organic layer was washed with saturated sodium chloride solution, dried with anhydrous magnesium sulfate, and concentrated. The residue was subjected to silica gel column chromatography, which afforded 97 mg (yield, 53%) of 3-{4-chloro-2-fluoro-5-[(methoxycarbonyl)methoxy]phenyl}-1-methyl-6-trifluoromethyl-2-oxo-1,2-dihydropyrazine (present compound 1-165; m.p., 116.6° C.).

1. additionwere added
2. customAfter completion of the reaction
3. extractionfollowed by extraction with ethyl acetate
4. washThe organic layer was washed with saturated sodium chloride solution
5. dry with materialdried with anhydrous magnesium sulfate
6. concentrationconcentrated