反应详情

The crude (S)-methyl 2-(6-((4′-((1-(cyclopropanecarbonyl)azetidin-3-yl)oxy)-2′,6′-dimethylbiphenyl-3-yl)methoxy)-2,3-dihydrobenzofuran-3-yl)acetate 15b (46 mg, 0.09 mmol) was dissolved in 3 mL of methanol, followed by addition of 1M aqueous lithium hydroxide solution (0.5 mL, 0.50 mmol). The reaction solution was stirred for 3 hours. The resulting solution was concentrated under reduced pressure, 1M hydrochloric acid was added dropwise to adjust the pH to 3, 3 mL of water were added, and then the solution was extracted with ethyl acetate (20 mL×2). The combined organic extracts were washed with saturated sodium chloride solution (30 mL), dried with anhydrous magnesium sulphate, and filtered. The filtrate was concentrated under reduced pressure to obtain the title compound (S)-2-(6-((4′-((1-(cyclopropanecarbonyl)azetidin-3-yl)oxy)-2′,6′-dimethylbiphenyl-3-yl)methoxy)-2,3-dihydrobenzofuran-3-yl)acetic acid 15 (20 mg, yield 44.0%) as a yellow solid.

1. concentrationThe resulting solution was concentrated under reduced pressure, 1M hydrochloric acid
2. additionwas added dropwise
3. additionwere added
4. extractionthe solution was extracted with ethyl acetate (20 mL×2)
5. washThe combined organic extracts were washed with saturated sodium chloride solution (30 mL)
6. dry with materialdried with anhydrous magnesium sulphate
7. filtrationfiltered
8. concentrationThe filtrate was concentrated under reduced pressure