Hydrochloric Acid → 1-(5-Hydroxypyridin-2-yl)-2-methylpropan-1-one

1.0 M Isopropylmagnesium chloride-tetrahydrofuran solution (104 mL, 104 mmol) was slowly added to a tetrahydrofuran (80 mL) solution of 5-hydroxypyridin-2-carbonitrile (5.00 g, 41.6 mmol) at 0° C., and the mixture was stirred at the same temperature for 3 hours. 1 M Hydrochloric acid was added to the reaction mixture, subsequently, a saturated aqueous solution of sodium hydrogen carbonate was added to the resulting mixture to adjust the pH to 6, and then the mixture was extracted twice with ethyl acetate. The organic layer thus obtained was washed with brine, and then dried over anhydrous sodium sulfate. The solvent was distilled off under reduced pressure, and the resulting residue was purified by silica gel column chromatography (hexane:ethyl acetate=80:20→50:50, v/v) to give the title compound (3.35 g, yield: 49%).

1. extractionthe mixture was extracted twice with ethyl acetate
2. customThe organic layer thus obtained
3. washwas washed with brine
4. dry with materialdried over anhydrous sodium sulfate
5. distillationThe solvent was distilled off under reduced pressure
6. customthe resulting residue was purified by silica gel column chromatography (hexane

ORD record

ord-c73f1e38e05b46bb8248c2c732b1b40a

Source dataset

uspto-grants-2016_01

DOI

10.6084/m9.figshare.5104873.v1

Patent number

US09233958B2