Oxalyl chloride → HCID 58158493, compound

Participants

Reaction Steps

To a solution (3 mL) of 6-methyl-1-(3-methylphenyl)-2-oxo-1,2-dihydropyridine-3-carboxylic acid (120 mg, 0.50 mmol) in tetrahydrofuran were added oxalyl dichloride (130 mg, 1.0 mmol) and N,N-dimethylformamide (1 drop), and the mixture was stirred at room temperature for 1 hr. The mixture was concentrated under reduced pressure, and the solvent was evaporated. N,N-Dimethylformamide (3.0 mL) and a solution (2.0 mL) of N-[6-(4-amino-2-fluorophenoxy)imidazo[1,2-a]pyridin-2-yl]cyclopropanecarboxamide (130 mg, 0.40 mmol) in N,N-dimethylformamide were successively added, and the mixture was stirred at room temperature for 5 hr. Saturated aqueous sodium hydrogen carbonate solution was added to the reaction solution, and the mixture was extracted with ethyl acetate. The organic layer was washed with water and saturated brine, dried over anhydrous magnesium sulfate and filtered. The solvent was evaporated under reduced pressure, and the obtained residue was washed with ethyl acetate and collected by filtration to give the title compound (150 mg, 69%) as a brown solid.

Provenance & Evidence