反应详情

温度

45 °C

To [(3S)-6-({2′,6′-dimethyl-4′-[3-(methylsulfonyl)propoxy]biphenyl-3-yl}methoxy)-2,3-dihydro-1-benzofuran-3-yl]acetic acid (15.0 g) were added acetone (30 mL) and water (10.5 mL) for dissolution therein. Activated carbon (0.45 g) was added, and the mixture was stirred at 45° C. for 10 min. The insoluble material was removed by filtration and washed with acetone (7.5 mL). Water (3 mL) was added dropwise to the filtrate, and the mixture was allowed to cool to room temperature. Seed crystal was added, and the mixture was stirred for 30 min. At 20° C., water (9 mL) and water (15 mL) was respectively added over 1 hr, and the mixture was stirred at 10° C. for 1 hr. The precipitated crystals were collected by filtration, and washed with a mixed solution (30 mL) of acetone.water (1:1) and then water (30 mL). The obtained crystals were dried at 30° C. under reduced pressure (1.5−3.0 kPa) to give [(3S)-6-({2′,6′-dimethyl-4′-[3-(methylsulfonyl)propoxy]biphenyl-3-yl}methoxy)-2,3-dihydro-1-benzofuran-3-yl]acetic acid hydrate as crystals (14.4 g). 100% ee.

1. dissolutionfor dissolution
2. additionActivated carbon (0.45 g) was added
3. customThe insoluble material was removed by filtration
4. washwashed with acetone (7.5 mL)
5. additionWater (3 mL) was added dropwise to the filtrate
6. temperatureto cool to room temperature
7. additionSeed crystal was added
8. stirringthe mixture was stirred for 30 min
9. additionAt 20° C., water (9 mL) and water (15 mL) was respectively added over 1 hr
10. stirringthe mixture was stirred at 10° C. for 1 hr
11. filtrationThe precipitated crystals were collected by filtration
12. washwashed with a mixed solution (30 mL) of acetone
13. customThe obtained crystals were dried at 30° C. under reduced pressure (1.5−3.0 kPa)