2-(Benzenesulfonyl)-3-phenyloxaziridine → 2-Amino-4-methanesulfinyl-6-phenoxy-pyrimidine-5-carbonitrile

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To a stirred suspension of 950 mg (3.68 mmol) 2-amino-4-methylsulfanyl-6-phenoxy-pyrimidine-5-carbonitrile in 20 ml dichloromethane was added 3.84 g (14.7 mmol) 3-phenyl-2-(phenylsulfonyl)oxaziridine and stirring continued for 24 hours at room temperature. The reaction mixture was then concentrated in vacuo and the residue resuspended in ether/hexane and filtered to afford 270 mg (27%) 2-amino-4-methanesulfinyl-6-phenoxy-pyrimidine-5-carbonitrile as a light yellow crystalline solid. ES-MS m/e (%): 275 (M+H+, 100).

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