Water → 3-(2,4-Dichloro-5-(1-methoxycarbonylethoxy)phenyl)-1-methyl-6-trifluoromethyl-2-oxo-1,2-dihydropyrazine

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Reaction Steps

Then, 0.15 g of 3-(2,4-dichloro-5-hydroxyphenyl)-1-methyl-6-trifluoromethyl-2-oxo-1,2-dihydropyrazine (present compound 1-357) was dissolved in 0.90 ml of N,N-dimethylformamide, to which 0.092 g of potassium carbonate and 54 μl of methyl 2-bromopropionate 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 0.184 g (yield, 98%) of 3-(2,4-dichloro-5-(1-methoxycarbonylethoxy)phenyl)-1-methyl-6-trifluoromethyl-2-oxo-1,2-dihydropyrazine (present compound 1-387).

Provenance & Evidence