反应详情

温度

100 °C

In a 500 mL round-bottom flask were added methyl 4-(1-cyano-2-ethoxy-2-oxoethyl)-3-nitrobenzoate (14.9 g, 51.0 mmol) and zinc dust (16.7 g, 255 mmol) in acetic acid (255 mL) to give a gray suspension. The addition of zinc was done over 35 minutes at room temperature over an atmosphere of nitrogen and was fairly exothermic. The mixture was heated at 100° C. for 15 hours. The mixture was allowed to cool down, filtered through Celite and rinsed with ethyl acetate. Evaporation afforded a residue which was triturated in dichloromethane-hexanes and afforded, after filtration 6.3 g of the title compound. LCMS m/z 263.2 (M+H)+, retention time (on analytical HPLC)=1.90 minutes.

1. customto give a gray suspension
2. temperatureto cool down
3. filtrationfiltered through Celite
4. washrinsed with ethyl acetate
5. customEvaporation
6. customafforded a residue which
7. customwas triturated in dichloromethane-hexanes
8. customafforded
9. filtrationafter filtration 6.3 g of the title compound
10. customLCMS m/z 263.2 (M+H)+, retention time (on analytical HPLC)=1.90 minutes