m-Chloroperbenzoic acid → Avanafil Impurity K

Participants

Reaction Steps

In DCM (5 mL) was dissolved 4-((3-chloro-4-methoxybenzyl)amino)-2-(methylthio)-N-(pyrimidin-2-ylmethyl)pyrimidine-5-formamide (150 mg, 0.35 mmol). m-CPBA (3-chloroperbenzoic acid, 110 mg, 0.64 mmol) was added at 0° C. The reaction was conducted for 30 min at ambient temperature. Then the reaction mixture was washed with water and extracted with DCM. The organic phase was dried, and the solvent was removed by rotary evaporation. Purification was performed by silica gel column chromatography (DCM/methanol=50/1) to give solid 4-((3-chloro-4-methoxybenzyl)amino)-2-(methylsulphinyl)-N-(pyrimidin-2-ylmethyl)pyrimidine-5-formamide (100 mg, 64% yield).

Provenance & Evidence