Iodine → 6-Fluoro-2-iodopyridin-3-ol

6-Fluoro-3-hydroxypyridine (870 mg) and iodine (9.76 g) were dissolved in a mixed solvent composed of methanol (20 ml) and water (10 ml) to prepare a solution which was then stirred at room temperature for 120 hr. Thereafter, sodium sulfite was added until the solution became transparent. Methanol in the reaction solution was removed under the reduced pressure, water was added to the residue, and the mixture was extracted with chloroform. The chloroform layer was washed with water and saturated brine and was dried over anhydrous magnesium sulfate. The solvent was removed by distillation under the reduced pressure, and the residue was purified by column chromatography using acetone-chloroform to give 6-fluoro-2-iodo-pyridin-3-ol (350 mg, yield 19%).

1. customto prepare a solution which
2. customMethanol in the reaction solution was removed under the reduced pressure, water
3. additionwas added to the residue
4. extractionthe mixture was extracted with chloroform
5. washThe chloroform layer was washed with water and saturated brine
6. dry with materialwas dried over anhydrous magnesium sulfate
7. customThe solvent was removed by distillation under the reduced pressure
8. customthe residue was purified by column chromatography

ORD record

ord-84827c35812b42ff930dd8d9445a6fbb

Source dataset

uspto-grants-2009_07

DOI

10.6084/m9.figshare.5104873.v1

Patent number

US07560558B2