m-Chloroperbenzoic acid → HCID 53816727, compound

Participants

Reaction Steps

237 mg of methyl 6-(6-cyano-3,4-dihydro-2 2-dimethyl-2H-1-benzopyran-4-yl)-3-pyridinecarboxylate were dissolved in 30 ml of dichloromethane and 180 mg of m-chloroperbenzoic acid were added. The mixture was stirred at room temperature overnight and then washed in succession with sodium bisulphite solution, sodium bicarbonate solution and water, dried over sodium sulphate and evaporated. The resulting oil was triturated with diethyl ether to give a solid which was recrystallized from t-butyl methyl ether. There were obtained 60 mg of 2-(6-cyano-3,4-dihydro-2,2-dimethyl-2H-1-benzopyran-4-yl)-5-(methoxycarbonyl)pyridine N-oxide of melting point 135°-137° C.

Provenance & Evidence