Triethylamine → 1-(2,2,2-Trifluoroethyl)-3-(3,5-dichlorophenyl)-4-(methoxycarbonylthio)-4,5-dihydro-1,2,4-triazin-6-one

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Reaction Steps

To a solution of 1-(2,2,2-trifluoroethyl)-3-(3,5-dichlorophenyl)-4,5-dihydro-1,2,4-triazin-6-one (110 mg, 0.34 mmol) dissolved in 5 mL tetrahydrofuran was added triethylamine (0.06 mL, 0.40 mmol) and methoxy-carbonylsulfenyl chloride (0.04 mL, 0.40 mmol). After 30 min, the reaction was quenched with water and diluted with ethyl acetate. The aqueous layer was extracted with ethyl acetate (2×5 mL), and the combined organic extracts were dried over magnesium sulfate, filtered, and concentrated in vacuo. The crude material was subjected to flash column chromatography (10% ethyl acetate/hexanes) to afford 1-(2,2,2-trifluoroethyl)-3-(3,5-dichlorophenyl)-4-(methoxycarbonylthio)-4,5-dihydro-1,2,4-triazin-6-one (60 mg, 43%) in 80% purity by LC.

Provenance & Evidence