Water → 6-Methyl-2-oxo-1-(3-trifluoromethylphenyl)-1,2-dihydro-pyridine-3-carboxylic acid (3-methyl-isoxazol-5-ylmethyl)-amide

関与物質

反応手順

The compound obtained in step (a) (0.050 g, 0.15 mmol) was dissolved in EtOAc (15 ml) under magnetic stirring. To this solution was added N-hydroxyacetimidoyl chloride (0.15 g, 1.6 mmol), water (0.3 ml) and KHCO3 (0.16 g, 1.6 mmol). The mixture was stirred for 2 days at which time LC-MS showed 90% conversion. The reaction was stopped and the mixture was partitioned between EtOAc (25 ml) and water (25 ml). The organic phase was washed (water, brine) and dried. Filtration and evaporation gave a crude mixture which was purified by chromatography on silica. Freeze-drying the pure fractions afforded the subtitle compound (0.031 g, 53%) as a white powder.

情報源と証拠