反应详情

温度

50 °C

A solution of 4-(1-isopropyl-4,4,6-trimethyl-1,2,3,4-tetrahydroquinolin-7-ylamino)-benzoic acid ethyl ester (Compound 46, 10.5 mg, 0.0275 mmol) in ethanol (1 mL) was treated with 2N KOH (0.5 mL) and stirred at 50° C. for 18 hours. The solvent was removed under reduced pressure and the residue was washed with ethyl acetate and acidified with 2N HCl. The aqueous layer was extracted with ethyl acetate and the combined organic layers were dried with MgSO4, filtered, and concentrated under reduced pressure. The residue was purified by silica gel chromatography (30% ethyl acetate in hexane, Rf=0.10) to give the title compound (9.3 mg, 96%) as a white solid: 1H NMR (300 MHz, CDCl3): δ1.17 (d, 6 H, J=6.6 Hz), 1.29 (s, 6 H), 1.72 (t, 2 H, J=6.0 Hz), 2.12 (s, 3 H), 3.15 (t, 2 H, J=6.0 Hz), 3.98 (sp, 1 H, J=6.6 Hz), 5.72 (br s, 1 H), 6.62 (s, 1 H), 6.79 (d, 2 H, J=8.7 Hz), 7.05 (s, 1 H), 7.96 (d, 2 H, J=8.7 Hz)

1. customThe solvent was removed under reduced pressure
2. washthe residue was washed with ethyl acetate
3. extractionThe aqueous layer was extracted with ethyl acetate
4. dry with materialthe combined organic layers were dried with MgSO4
5. filtrationfiltered
6. concentrationconcentrated under reduced pressure
7. customThe residue was purified by silica gel chromatography (30% ethyl acetate in hexane, Rf=0.10)