Water → 6-Fluoro-3-(4-methoxyphenoxy)-2-pyrazinecarbonitrile

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Reaction Conditions

Reaction Steps

In 39 mL of dimethyl sulfoxide was dissolved 1.95 g of 6-chloro-3-(4-methoxyphenoxy)-2-pyrazinecarbonitrile. After adding 2.16 g of potassium fluoride, the mixture thus obtained was stirred at 100-110° C. for 3 hours. The reaction mixture was returned to room temperature, a mixture of 40 mL of ethyl acetate and 200 mL of water was added, and the organic layer was separated. The organic layer thus obtained was washed with saturated aqueous solution of sodium chloride and dried on anhydrous magnesium sulfate, and the solvent was removed under reduced pressure. The residue thus obtained was purified by silica gel column chromatography [eluent: n-hexane:ethyl acetate=5:1] to obtain 1.45 g of 6-fluoro-3-(4-methoxyphenoxy)-2-pyrazinecarbonitrile as a yellow-colored solid product.

Provenance & Evidence