反应详情

2-Fluoronitrobenzene (4.2 ml, 40 mmol), methyl 3-hydroxyphenylacetate (5 g, 32.5 mmol) and potassium carbonate (6.9 g, 50 mmol) were heated together in DMF (100 ml) at 100° C. for 36 hrs. After evaporation of the solvent, the residue was partitioned between water (100 ml) and dichloromethane (100 ml), and the aqueous phase further extracted with dichloromethane (2×100 ml). The combined organics were dried and evaporated, and the residue chromatographed on silica, eluting with 25% ethyl acetate/60°-80° petrol to yield methyl 3-(2-nitrophenyloxy)phenylacetate (4 g); δH (CDCl3) 3.62 (2H, s, CH2CO2Me), 3.69 (3H, s, CO2Me), 6.94 (1H, d, J 7.2 Hz, ArH), 7.00-7.04 (2H, m, ArH), 7.09 (1H, d, J 8.3 Hz, ArH), 7.19 (1H, t, J 8.3 Hz, ArH), 7.32 (1H, t, J 7.9 Hz, ArH), 7.50 (1H, t, J 7.2 Hz, ArH), 7.94 (1H, d, J 8.2 Hz, ArH).

1. customAfter evaporation of the solvent
2. customthe residue was partitioned between water (100 ml) and dichloromethane (100 ml)
3. extractionthe aqueous phase further extracted with dichloromethane (2×100 ml)
4. customThe combined organics were dried
5. customevaporated
6. customthe residue chromatographed on silica
7. washeluting with 25% ethyl acetate/60°-80° petrol