反应详情

To a stirred suspension of 500 mg (2.03 mmol) 2-amino-4-(5-methyl-furan-2-yl)-6-methylsulfanyl-pyrimidine-5-carbonitrile in 20 ml carbon tetrachloride under argon were added 397 mg (2.23 mmol) N-bromosuccinimide and a small spatula end of benzoyl peroxide. Stirring was continued for 8 hours while the reaction mixture was irradiated with a 500 W halogen lamp. The reaction mixture was then concentrated in vacuo. Chromatography (1/1 ethyl acetate/hexane) followed by trituration in ether afforded 250 mg (38%) 2-amino-4-(5-bromomethyl-furan-2-yl)-6-methylsulfanyl-pyrimidine-5-carbonitrile as a yellow crystalline solid. EI-MS m/e (%): 326 (M{81Br}+, 5), 325 ([M{81Br}-H]+, 6), 324 (M{79Br}+, 5), 324 ([M{79Br}-H]+, 6), 245 ([M—Br]+, 100).

1. concentrationThe reaction mixture was then concentrated in vacuo