Thionyl Chloride → HCID 86710329, compound

Participants

Reaction Conditions

Reaction Steps

4-(4-chloro-2,5-difluorophenyl)nicotinic acid (170 mg, 0.630 mmol) was taken in thionyl chloride (0.14 mL, 1.89 mmol) and heated at 65° C. for 1 h. The solvent was evaporated under reduced pressure to afford a crude oil which was dissolved in dichloromethane and added to a mixture of methanamine hydrochloride (63.9 mg, 0.946 mmol) and DIEA (0.11 mL, 0.63 mmol) in DCM (8 mL) dropwise at 0° C. The reaction mixture was then allowed to warm to room temperature and stirred for 7 h. The reaction mixture was diluted with DCM (5 mL) and washed with water (3×5 mL) followed by brine (1×10 mL). The combined organic extracts were dried over sodium sulfate and concentrated under reduced pressure to provide the crude product which was purified by preparative thin layer chromatography (3:2 Ethyl acetate:hexane) to afford 4-(4-chloro-2,5-difluorophenyl)-N-methylnicotinamide (90 mg, 0.264 mmol, 42% yield) as a white solid. LC/MS (ESI) m/e 283.0 [(M+H)+, calcd for C13H10ClF2N2O 283.0]; LC/MS retention time (method A): tR=1.46 min.

Provenance & Evidence