反应详情

6-Amino-2-(4-chloro-2-fluoro-3-methoxyphenyl)pyrimidine-4-carboxylic acid methyl ester (778 mg, 2.5 mmol) and N-bromosuccinimide (489 mg, 2.75 mmol) were combined in chloroform (10 mL) and heated at reflux for 12 h. The cooled reaction mixture was concentrated and the product was purified by flash chromatography on silica gel to yield the title compound (752 mg, 77% yield): mp 173-175° C.: 1H NMR (CDCl3) δ 7.66 (dd, 1H), 7.24 (dd, 1H), 5.73 (br s, 2H), 4.03 (s, 3H), 4.01 (d, 3H).

1. temperatureheated
2. temperatureat reflux for 12 h
3. customThe cooled reaction mixture
4. concentrationwas concentrated
5. customthe product was purified by flash chromatography on silica gel