反应详情

To a mixture of ethyl 3-[4-({2′,6′-dimethyl-4′-[(6-methylpyridin-2-yl)methoxy]biphenyl-3-yl}methoxy)-2-fluorophenyl]propanoate (1.30 g, 2.46 mmol), methanol (6 mL) and tetrahydrofuran (10 mL) was added 1 N sodium hydroxide aqueous solution (4.9 mL) at room temperature with stirring, and the mixture was stirred at the same temperature for 2 hrs. The reaction mixture was neutralized with 1 N hydrochloric acid, diluted with ethyl acetate, washed with saturated brine, dried and concentrated under reduced pressure. The residue was purified by silica gel column chromatography (hexane/ethyl acetate=4/1-ethyl acetate) to give an oil. The oil was dissolved in ethyl acetate and 4 N hydrogen chloride-ethyl acetate solution was added. The precipitated crystals were collected by filtration, washed and dried to give the title compound (1.14 g, yield 86%) as colorless crystals.

1. stirringthe mixture was stirred at the same temperature for 2 hrs
2. washwashed with saturated brine
3. customdried
4. concentrationconcentrated under reduced pressure
5. customThe residue was purified by silica gel column chromatography (hexane/ethyl acetate=4/1-ethyl acetate)
6. customto give an oil
7. filtrationThe precipitated crystals were collected by filtration
8. washwashed
9. customdried