反应详情

温度

110 °C

Ethyl 6-hydroxy-2,4-dioxo-3-(phenylmethyl)-1-(2-pyridinyl)-1,2,3,4-tetrahydro-5-pyrimidinecarboxylate. 2-Isocyanatopyridine (265 mg, 2.2 mmoles) was added to a suspension of sodium hydride (200 mg, 5 mmoles) and diethyl {[(phenylmethyl)amino]carbonyl}propanedioate (example 1a, 425 mg, 1.45 mmoles) in anhydrous dioxane (10 mL). The mixture was heated in a microwave reactor at 110° C. for 1 hour, cooled, dissolved in dichloromethane, washed with 1 molar hydrochloric acid and purified by flash chromatography (ethyl acetate-10% methanol in ethyl acetate) to give the title compound (90 mg, 12%) 1H NMR (400 MHz, DMSO-d6) δ ppm 8.93 (dd, J=7.20, 1.39 Hz, 1 H), 8.11-8.26 (m, 1 H), 7.19-7.45 (m, 7 H), 4.78-5.01 (m, 2 H), 4.15 (q, J=7.24 Hz, 2 H), 1.24 (t, J=7.07 Hz, 3 H).

1. temperaturecooled
2. washwashed with 1 molar hydrochloric acid
3. custompurified by flash chromatography (ethyl acetate-10% methanol in ethyl acetate)