反应详情

温度

100 °C

A mixture of ethyl N-{[6-hydroxy-2,4-dioxo-3-(phenylmethyl)-1,2,3,4-tetrahydro-5-pyrimidinyl]carbonyl}glycinate (example 11a, 388 mg, 1.12 mmoles), 2,6-dichlorobenzyl bromide (295 uL, 1.23 mmoles) and sodium carbonate (330 mg, 3.1 mmoles) in dimethylformamide (6.0 mL) was stirred under argon at 100° C. for 2.5 hours. The mixture was cooled, poured into 1 molar hydrochloric acid and extracted with ethyl acetate (×2). The ester was hydrolysed by stirring in a mixture of ethanol (3 mL) and 1 molar sodium hydroxide solution (3 mL) for 3 hours. The mixture was acidified and extracted with ethyl acetate. Purification by preparative HPLC (acetonitrile-water—0.1% TFA, 20-100%) and crystallization from ethanol-water gave the title compound (60 mg, 11%). 1H NMR (400 MHz, DMSO-d6) δ ppm 13.12 (br. s., 1 H), 10.02 (br. s., 1 H), 7.42 (d, 2 H), 7.22-7.35 (m, 6 H), 5.30 (s, 2 H), 5.01 (s, 2 H), 4.12 (d, J=5.81 Hz, 2 H).

1. temperatureThe mixture was cooled
2. extractionextracted with ethyl acetate (×2)
3. stirringby stirring in a mixture of ethanol (3 mL) and 1 molar sodium hydroxide solution (3 mL) for 3 hours
4. extractionextracted with ethyl acetate
5. customPurification
6. customby preparative HPLC (acetonitrile-water—0.1% TFA, 20-100%) and crystallization from ethanol-water