Methanol → HCID 13080730, compound

Temperature

-78 °C

A solution of (3aR,4S,5R,6aS) -4-(t-butyldimethylsilyloxymethyl)-5-(2-tetrahydropyranyloxy)hexahydrocyclopenta[b]furan-2-one (22) (96.7 g, 261 mmol) in toluene (600 ml) was cooled to −75° C. 1.5M-diisobutyl aluminum hydride (261 ml, 392 mmol) was added thereto drop wise and the mixture was stirred at −78° C. for approximately 2 hours. After adding methanol (69.0 ml, 1703 mmol) drop wise to the solution, the solution was warmed to room temperature. Saturated aqueous potassium sodium tartrate (800 ml) and diethyl ether (400 ml) were added thereto and the mixture was stirred for one hour, let to stand and then separated into two layers. The aqueous layer was extracted twice with diethyl ether (400 ml). The organic layers were combined, washed twice with saturated aqueous sodium chloride (800 ml) and then dried with anhydrous magnesium sulfate. The solution was concentrated under reduced pressure to give (3aR,4S,5R,6aS)-4-(t-butyldimethylsilyloxymethyl)-5-(2-tetrahydropyranyloxy)hexahydrocyclopenta[b]furan-2-ol (23) (97.8 g, quantitatively) as a slightly yellow oil.

1. temperaturethe solution was warmed to room temperature
2. stirringthe mixture was stirred for one hour
3. customseparated into two layers
4. extractionThe aqueous layer was extracted twice with diethyl ether (400 ml)
5. washwashed twice with saturated aqueous sodium chloride (800 ml)
6. dry with materialdried with anhydrous magnesium sulfate
7. concentrationThe solution was concentrated under reduced pressure

ORD record

ord-4f22911b036240c3810ec086bf34231b

Source dataset

uspto-grants-2010_10

DOI

10.6084/m9.figshare.5104873.v1

Patent number

US07812182B2