反应详情

3,5-Dinitro-benzoic acid methyl ester (Example 312, 13.7 g, 60.6 mmol), Pd/C (Aldrich, 1.34 g, 10%, 0.61 mmol), triethylamine (Aldrich, 36.4 mL, 273 mmol) was dissolved in 30 mL of CH3CN. To the above solution was added a solution of HCOOH (Aldrich, 9.7 mL, 261 mmol) in 30 mL of CH3CN dropwise. The mixture was then refluxed for 2 h. After cooled to room temperature, the mixture was filtered through a Celite pad, washed with EtOAc, and the filtrate was concentrated. The residue was purified by chromatography (5%-10% EtOAc/CH2Cl2) to give 7.0 g (59%) of product. 1H NMR (400 MHz, DMSO-d6) δ 7.74 (t, J=2.0 Hz, 1H), 7.59 (t, J=2.2 Hz, 1H), 7.55 (t, J=2.0 Hz, 1H), 6.16 (s, 2H), 3.87 (s, 3H).

1. temperatureThe mixture was then refluxed for 2 h
2. filtrationthe mixture was filtered through a Celite pad
3. washwashed with EtOAc
4. concentrationthe filtrate was concentrated
5. customThe residue was purified by chromatography (5%-10% EtOAc/CH2Cl2)