m-Chloroperbenzoic acid → HCID 18472669, compound

Participants

Reaction Steps

To a solution of N-[4—(2-pyridylmethyl)phenyl]-6—(4-methylphenyl)-2H-1-benzopyran-3-carboxamide (250 mg) in tetrahydrofuran (10 ml) was added 3-chloroperbenzoic acid (70%, 0.21 g) at 0° C., and the mixture was stirred at room temperature for 14 hours. To the reaction mixture was added sodiumithiosulfate solution, and the mixture was stirred for a few minutes. The mixture was extracted with ethyl acetate. The organic layer was washed with saturated sodium bicarbonate solution and saturated sodium chloride solution, dried with magnesium sulfate and concentrated. The residue was separated and purified with column chromatography (ethanol/ethyl acetate=1:3) concentrated to give crystals, which were recrystallized from chloroform-ethanol to give N-[4—(1-oxidopyridin-2-ylmethyl)phenyl]-6—(4-methylphenyl)-2H-1-benzopyran-3-carboxamide (Compound 200) (191 mg) as pale yellow crystals.

Provenance & Evidence