反应详情

Ethyl 1-(6-chloro-5-(cyclopropylmethoxy)-4′-(trifluoromethyl)biphenyl-3-yl)cyclobutanecarboxylate (0.1 g) dissolved in MeOH/THF/H2O (10 mL/10 mL/5 mL) and 70 mg LiOH added. The reaction mixture was stirred at room temperature for 5 h and concentrated under reduced pressure. Water (10 mL) was added and the reaction mixture was extracted with EtOAc (3×10 mL). The combined organic extracts were dried over MgSO4, filtered and evaporated under reduced pressure. Purification by column chromatography over silica gel (hexane/EtOAc 9:1) gave 1-(6-chloro-5-(cyclopropylmethoxy)-4′-(trifluoromethyl)biphenyl-3-yl)cyclobutanecarboxylic acid (75 mg) as a white solid. 1H-NMR (500 MHz, CDCl3): 7.71 (d, 2H), 7.54 (d, 2H), 6.86 (s, 1H), 6.85 (s, 1H), 3.97 (d, 2H), 2.85 (m, 2H), 2.54 (m, 2H), 2.13 (m, 1H), 1.92 (m, 1H), 1.35 (t, 1H), 0.47 (m, 2H), 0.41 (m, 2H).

1. concentrationconcentrated under reduced pressure
2. additionWater (10 mL) was added
3. extractionthe reaction mixture was extracted with EtOAc (3×10 mL)
4. dry with materialThe combined organic extracts were dried over MgSO4
5. filtrationfiltered
6. customevaporated under reduced pressure
7. customPurification by column chromatography over silica gel (hexane/EtOAc 9:1)