Hydrochloric Acid → 6-Fluoro-4-iodopyridin-3-ol

HRID 1640891Notes

Reaction equation

Cl.[F:2][C:3]1[CH:8]=[C:7]([I:9])[C:6]([O:10]COC)=[CH:5][N:4]=1.C(=O)(O)[O-].[Na+]>C1COCC1>[F:2][C:3]1[N:4]=[CH:5][C:6]([OH:10])=[C:7]([I:9])[CH:8]=1

Participants

Conditions

Temperature: 60 °C

Procedure

Add HCl (3 M in water, 31 mL, 93.0 mmol) to a solution of 2-fluoro-4-iodo-5-methoxymethoxy-pyridine (3.9 g, 13.8 mmol) in THF (20 mL). Stir the mixture at 60° C. for 3 h and cool down the mixture. Adjust the pH to 7 with slow addition of a saturated aqueous sodium bicarbonate solution. Extract the solution with ethyl acetate three times. Wash the organic layer with aqueous saturated sodium chloride. Dry the mixture over sodium sulfate. Concentrate the solution in vacuo to afford the title compound (3.2 g, 97%) as a yellow solid. MS (ES) m/z 240 [M+1]+.

Workup

temperaturecool down the mixture
extractionExtract the solution with ethyl acetate three times
washWash the organic layer with aqueous saturated sodium chloride
dry with materialDry the mixture over sodium sulfate
concentrationConcentrate the solution in vacuo

Sources & evidence

ORD record: ord-6078fe2da4e44b22bdb7af9e4042e7f6
Source dataset: uspto-grants-2012_02
DOI: 10.6084/m9.figshare.5104873.v1
Patent number: US08114872B2

Reaction notes

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