反应详情

温度

70 °C

To a suspension of dimethyl malonate (9.77 mL, 85.07 mmol, 1.2 eq) in DMF (100 mL) and K2CO3 (29.36 g, 212.76 mmol, 3.0 eq) was added 1-fluoro-4-nitrobenzene (7.51 mL, 70.91 mmol, 1.0 eq) at RT and the mixture was stirred for 16 h at 70° C. The reaction mixture was cooled to RT and diluted with water (200 mL) and extracted with ethyl acetate (2×100 mL). The ethyl acetate layers were collected, washed with cold water (2×50 mL), brine (50 mL), dried over sodium sulfate and evaporated under vacuum. The crude product was washed with n-pentane (50 mL) to get dimethyl 2-(4-nitrophenyl)malonate 14 g, 78%) as pale yellow solid (TLC system: EtOAc/PE (3:7), Rf: 0.50).

1. temperatureThe reaction mixture was cooled to RT
2. extractionextracted with ethyl acetate (2×100 mL)
3. customThe ethyl acetate layers were collected
4. washwashed with cold water (2×50 mL), brine (50 mL)
5. dry with materialdried over sodium sulfate
6. customevaporated under vacuum
7. washThe crude product was washed with n-pentane (50 mL)