反应详情

Add 10% palladium on carbon (4.06 g, 12.22 mmol) to a solution of 2-isopropoxycarbonylamino-4-trifluoromethyl-5-vinyl-benzoic acid methyl ester (40.48 g, 122.19 mmol) in methanol (350 mL) in a Parr bottle. Subject the mixture to a hydrogen atmosphere at a pressure of 30 psi at room temperature with shaking on a Parr shaker apparatus for 2 h. Filter the mixture through Celite and remove the solvent under reduced pressure to provide the title compound as a white solid (39.07 g, 96%): TLC Rf 0.62 (3:1 hexanes/ethyl acetate); 1H NMR (CDCl3, 300 MHz) δ 1.13-1.42 (m, 9H), 2.71-2.80 (m, 2H), 3.89 (s, 3H), 5.21-5.27 (m, 1H), 7.98 (s, 1H), 8.81 (s, 1H), 10.23 (bs, 1H).

1. customat room temperature
2. filtrationFilter the mixture through Celite
3. customremove the solvent under reduced pressure