反应详情

To a solution of 2-methoxyethyl 4-methoxy-3-(2-methoxyethoxy)benzoate (15.05 g, 52.9 mmol) in AcOH (54 mL) under an atmosphere of N2 was added conc. HNO3 (13.5 mL) in one portion. The reaction was stirred at RT for 72 h. The mixture was poured into ice-water (ca. 800 mL) and extracted with EtOAc (2×400 mL). The combined organics were washed with water (2×200 mL) and brine (1×200 mL), dried (Na2SO4) and conc. in vacuo. The residue was azeotroped with heptane (2×300 mL) to remove residual AcOH giving 2-methoxyethyl 4-methoxy-5-(2-methoxyethoxy)-2-nitrobenzoate as a dark colored oil. (15.5 g, 47.1 mmol, 89%). HPLC retention time 6.24 mins.

1. extractionextracted with EtOAc (2×400 mL)
2. washThe combined organics were washed with water (2×200 mL) and brine (1×200 mL)
3. dry with materialdried (Na2SO4)
4. customThe residue was azeotroped with heptane (2×300 mL)
5. customto remove residual AcOH