Potassium Phosphate, Tribasic → 4-iodo-2H,3H-furo(2,3-b)pyridine

To a solution of 2-(2-fluoro-4-iodopyridin-3-yl)ethanol (3.13 g, 11.7 mmol) in 1,4-dioxane (100 mL), K3PO4 (10.0 g, 47.1 mmol) was added. The mixture was heated under reflux for 36 h. The reaction mixture was then filtered, the filter cake was washed with EtOAc, and the combined filtrates were concentrated under reduced pressure. The residue was dissolved in DCM (100 mL), washed with brine (2×100 mL), dried over Na2SO4 and concentrated. The resulting residue of the crude sub-title compound (2.55 g) was used in the next step directly without further purification. LCMS calc. for C7H7INO (M+H)+: m/z=247.9. found 248.0.

1. temperatureThe mixture was heated
2. temperatureunder reflux for 36 h
3. filtrationThe reaction mixture was then filtered
4. washthe filter cake was washed with EtOAc
5. concentrationthe combined filtrates were concentrated under reduced pressure
6. dissolutionThe residue was dissolved in DCM (100 mL)
7. washwashed with brine (2×100 mL)
8. dry with materialdried over Na2SO4
9. concentrationconcentrated
10. customThe resulting residue of the crude sub-title compound (2.55 g) was used in the next step directly without further purification

ORD record

ord-b7c6b682849e46b8816d5a1546c364a6

Source dataset

uspto-grants-2016_03

DOI

10.6084/m9.figshare.5104873.v1

Patent number

US09278950B2