4-Fluorobenzoyl chloride → HCID 22266494, compound

Participants

Reaction Steps

3-Amino-1-butyl-5,6-dimethyl-2-pyridone (5-004-02) (117 mg) was dissolved in pyridine, (1 mL), and the reaction mixture was stirred under ice-cooling and nitrogen atmosphere, and to the reaction mixture was added dropwise a solution of 4-fluorobenzoyl chloride (0.08 mL) in tetrahydrofuran (1 mL) over 10 min, followed by stirring at the same condition. After 3 h, the reaction mixture was diluted with ethyl acetate and poured into ice-water, extracted once with ethyl acetate, washed with aqueous hydrochloric acid solution, water, an aqueous solution of sodium bicarbonate, and water, dried over magnesium sulfate, and evaporated under reduced pressure. The obtained crystal residue (202 mg) was recrystallized from methylene chloride/n-hexane to give 1-butyl-3-(4-fluorobenzoyl)amino-5,6-dimethyl-2-pyridone (5-004) (103 mg, 54.2%, m.p. 129 to 130° C.) as a colorless needle.

Provenance & Evidence