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HuagongsheHuagongshe Chemistry Print Report · For research reference only
HRID 470532Generated: October 30, 2026

Water → 4-Bromo-5-fluoro-1-methylpyridin-2(1H)-one

https://huagongshe.com/reaction/470532

Reaction equation

Participants

RoleNameHCIDCharge
ReactantWaterHCID 962—
ReactantMethyl iodideHCID 6328—
ReactantPotassium CarbonateHCID 11430—
Reactant4-Bromo-5-fluoropyridin-2(1H)-oneHCID 26746984—
SolventDimethylformamideHCID 6228—
Product4-Bromo-5-fluoro-1-methylpyridin-2(1H)-oneHCID 59635671—

Reaction Steps

Methyl iodide (0.9 mL) was added to a mixture of potassium carbonate (2.34 g) and 4-bromo-5-fluoro-1H-pyridin-2-one (2.50 g) in dimethylformamide (25 mL) at room temperature. The mixture was stirred at room temperature overnight and then water was added. The resulting mixture was extracted with ethyl acetate and the combined extracts were washed with brine and dried (MgSO4). The solvent was evaporated to afford the crude title compound that was recrystallized from Et2O. Yield: 1.22 g (45% of theory); Mass spectrum (ESI+): m/z=206/208 (Br) [M+H]+.

Provenance & Evidence

DOI10.6084/m9.figshare.5104873.v1
Patent numberUS08629138B2
Source datasetuspto-grants-2014_01
ORD IDord-90ec3404f28944cdac0d87f0100e06ed
Source noteuspto-grants-2014_01