反应详情

Ammonium formate (16.3 g, 258 mmol, 3 equiv), followed by Pearlman's catalyst [Pd(OH)2] (6.03 g, 4.30 mmol, 0.05 equiv) was added to a solution of 4′-trifluoromethyl-biphenyl-2-carboxylic acid (3-nitro-phenyl)-amide (33.2 g, 85.9 mmol, 1 equiv) in isopropanol (330 mL, 10 volumes) and ethyl acetate (170 mL, 5 volumes). The mixture was heated at reflux for 3 hours. After cooling, THF (500 mL) was added to the reaction mixture to help solubilize the product. The reaction mixture was filtered through diatomaceous earth and the filtrate was concentrated to about 100 mL. Ethyl acetate (600 mL) and THF (200 mL) were added. The organic layer was washed with saturated sodium bicarbonate solution (300 mL), dried over sodium sulfate, filtered, and concentrated to afford 4′-trifluoromethyl-biphenyl-2-carboxylic acid (3-amino-phenyl)-amide (28.7 g, 94%) as an off-white solid.

1. temperatureThe mixture was heated
2. temperatureat reflux for 3 hours
3. temperatureAfter cooling
4. filtrationThe reaction mixture was filtered through diatomaceous earth
5. concentrationthe filtrate was concentrated to about 100 mL
6. additionEthyl acetate (600 mL) and THF (200 mL) were added
7. washThe organic layer was washed with saturated sodium bicarbonate solution (300 mL)
8. dry with materialdried over sodium sulfate
9. filtrationfiltered
10. concentrationconcentrated