m-Chloroperbenzoic acid → 4-(2-(4-aminophenylsulfinyl)pyridin-3-yl)-N-methylpyrimidin-2-amine

Participants

Reaction Conditions

Reaction Steps

To a cold (0° C.) suspension of 4-(2-(4-aminophenylthio)pyridin-3-yl)-N-methylpyrimidin-2-amine (400 mg, 1.28 mmol) in 20 mL of dichloromethane was added dropwise a solution of 3-chloroperoxybenzoic acid (330 mg, 1.28 mmol, 77% maximum purity) in dichloromethane. The reaction was stirred for 7 hours at 0° C. Then the reaction flask was stored in the freezer overnight without stirring. After 17 hours, the reaction was removed from the freezer and was stirred for another 6 hours in an ice-water bath. The solid was filtered off and collected. The product, 4-(2-(4-aminophenylsulfinyl)pyridin-3-yl)-N-methylpyrimidin-2-amine was obtained as an off-white solid. 1H NMR (Varian, 300 MHz, CDCl3): 8.76 (s, 1H), 8.35 (s, 1H), 8.00 (d, J=7.7 Hz, 1H), 7.60 (m, 1H), 7.46 (m, 3H), 6.78 (d, J=4.9 Hz, 1H), 6.46 (d, J=8.0 Hz, 2H), 5.63 (br s, 2H), 2.81 (s, 3H).

Provenance & Evidence