Tetrahydrofuran → 1-(2-Methylthiopyrimidin-4-yl)-2-(3-trifluoromethylphenyl)ethane-1,2-dione-1-oxime

Beteiligte Stoffe

Reaktionsschritte

To a mixture of 2-(2-methylthiopyrimidin-4-yl)-1-(3-trifluoromethylphenyl)ethanone (4.5 g, 0.0144 mole) in acetic acid (67 mL), was added THF (54 mL) and water (9 mL). The mixture was cooled to +5° C. and a solution of sodium nitrite (1.34 g, 0.0194 mole) added dropwise while maintaining the temperature below +10° C. Upon completion of addition, the reaction was allowed to warm to room temperature for 1 hour, diluted with water (200 mL) and ethyl acetate (200 mL) and the pH adjusted to 7.5 with 3N NaOH. The layers were separated and the aqueous layer washed with ethyl acetate (100 mL). The organic layers were combined, dried over anhydrous sodium sulfate, filtered and concentrated to an oil. Yield 4.9 g.

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