Acetic Anhydride → methyl 2-((S)-6-((4'-(((S)-1-acetylpyrrolidin-3-yl)oxy)-2',6'-dimethylbiphenyl-3-yl)methoxy)-2,3-dihydrobenzofuran-3-yl)acetate

The crude methyl 2-((S)-6-((2′,6′-dimethyl-4′-((S)-pyrrolidin-3-yloxy)biphenyl-3-yl)methoxy)-2,3-dihydrobenzofuran-3-yl)acetate 8a (45 mg, 0.09 mmol) were dissolved in 3 mL of dichloromethane, followed by addition of acetic anhydride (13 mg, 0.11 mmol) and triethylamine (18 mg, 0.18 mmol). The reaction solution was stirred for 2 hours. The resulting solution was mixed with 20 mL of dichloromethane. The organic phase was 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 crude title compound methyl 2-((S)-6-((4′-(((S)-1-acetylpyrrolidin-3-yl)oxy)-2′,6′-dimethylbiphenyl-3-yl)methoxy)-2,3-dihydrobenzofuran-3-yl)acetate 9a (45 mg, yield 92.5%) as a colorless oil.

1. washThe organic phase was washed with saturated sodium chloride solution (30 mL)
2. dry with materialdried with anhydrous magnesium sulphate
3. filtrationfiltered
4. concentrationThe filtrate was concentrated under reduced pressure

ORD-Eintrag

ord-c2c2b720a38b443b850fd71f403cea45

Quelldatensatz

uspto-grants-2015_09

DOI

10.6084/m9.figshare.5104873.v1

Patentnummer

US09139548B2