Methanol → HCID 54153847, compound

Temperature

80 °C

Methyl (4aS, 7aS)-1-hydroxy-7-methylene-1, 4a, 5, 6, 7a-pentahydrocyclopenta[c]pyran-4-carboxylate (2.0 g, 0.0095 mol) obtained in Example 22 wad dissolved in 40 mι of tetrahydrofuran, and after sodium boron hydride (1.8 g, 0.047 mol) was added, the reaction mixture was heated and refluxed at 80° C. 9.5 mι of methanol wad added dropwise to this solution in the course of 1 hour, and the reaction mixture was stirred further at the same temperature. 50 mι of saturated ammonium chloride solution wad added to the reaction mixture. After an organic solvent was once distilled off, the aqueous layer was extracted by ethyl acetate (100 mι×3). The organic layer was joined, and was dried by adding magnesium sulfate, filtered, and thereafter concentrated under a reduced pressure. The residual matter was purified by chromatography using silica gel, and the solvent of the fraction obtained from ether:ethyl acetate=3:7 eluent was distilled off. A colorless oily substance was thus obtained, i.e., 2-[(1R, 2R)-2-(hydroxymethyl)-3-methylenecyclopent-1-yl]-ethane-1-ol (450 mg, yield=30.2%). This 2-[(1R, 2R)-2-(hydroxymethyl)-3-methylcyclopent-1-yl]-ethane-1-ol had the following physicochemical properties:

1. temperaturethe reaction mixture was heated
2. distillationAfter an organic solvent was once distilled off
3. extractionthe aqueous layer was extracted by ethyl acetate (100 mι×3)
4. customwas dried
5. additionby adding magnesium sulfate
6. filtrationfiltered
7. concentrationconcentrated under a reduced pressure
8. customThe residual matter was purified by chromatography
9. customthe solvent of the fraction obtained from ether
10. distillationethyl acetate=3:7 eluent was distilled off
11. customA colorless oily substance was thus obtained

ORD record

ord-3bbadac417b940adb15e58814e123cab

Source dataset

uspto-grants-1995_10

DOI

10.6084/m9.figshare.5104873.v1

Patent number

US05459160