反应详情

温度

110 °C

Ethyl 6-hydroxy-1-(2-nitrophenyl)-2,4-dioxo-3-(phenylmethyl)-1,2,3,4-tetrahydro-5-pyrimidinecarboxylate. Diethyl {[(phenylmethyl)amino]carbonyl}propanedioate (420 mg, 1.43 mmoles) was added to a suspension of sodium hydride (60% suspension in mineral oil, 220 mg, 5.5 mmoles) in dry dioxan (10 mL) and stirred for 10 minutes under argon. 2-Nitrophenyl isocyanate (360 mg, 2.20 mmoles) was added and the mixture sealed in a pressure flask heated in a microwave reactor at 110° C. for 1 hour. The mixture was taken up in dichloromethane, washed with 1 molar hydrochloric acid and evaporated onto silica gel. Flash chromatography (hexane to 0.5% formic acid in ethyl acetate) gave the title compound (59 mg, 7%) 1H NMR (400 MHz, DMSO-d6) δ ppm 8.16 (s, 1 H), 7.81 (s, 1 H), 7.68 (s, 1 H), 7.47 (s, 1 H), 7.08-7.38 (m, 5 H), 4.77-5.16 (m, 2 H), 4.12 (q, J=5.31 Hz, 2 H), 0.97-1.31 (m, 3 H)

1. customthe mixture sealed in a pressure flask
2. washwashed with 1 molar hydrochloric acid
3. customevaporated onto silica gel