Tetrahydrofuran → 1-o-Benzyl-3-o-t-butyldimethylsilyl-2-o-methyl-rac-glycerol

Reaktionsgleichung

[CH2:1]([O:8][CH2:9][CH:10]([CH2:12][O:13][Si:14]([C:17]([CH3:20])([CH3:19])[CH3:18])([CH3:16])[CH3:15])[OH:11])[C:2]1[CH:7]=[CH:6][CH:5]=[CH:4][CH:3]=1.[H-].[Na+].[CH2:23]1COCC1>>[CH2:1]([O:8][CH2:9][CH:10]([CH2:12][O:13][Si:14]([C:17]([CH3:20])([CH3:19])[CH3:18])([CH3:15])[CH3:16])[O:11][CH3:23])[C:2]1[CH:7]=[CH:6][CH:5]=[CH:4][CH:3]=1

Komponenten

Edukt 3

HCID 8028Tetrahydrofuran

HCID 24758Sodium hydride

HCID 156217871-O-benzyl-3-O-t-butyldimethylsilylglycerol

Produkt 1

HCID 223164691-o-Benzyl-3-o-t-butyldimethylsilyl-2-o-methyl-rac-glycerolAusbeute 74 %

Versuchsvorschrift

Alcohol Compound 40 (48.8 g, 0.16 mmol) was added to a mixture of NaH (4.0 g, 0.17 mol) in dry THF (500 mL). After 5 min, Mel (10 mL, 0.17 mol) was added and, after another 3 hours, the mixture was quenched with H2O (150 mL), extracted into diethyl ether (500 mL), dried (MgSO4) and concentrated. Purification of the residue by silica-gel column chromatography [eluent: hexane/ethyl acetate, 90/10, v/v] yielded 1-O-benzyl-3-O-t-butyldimethylsilyl-2-O-methyl-rac-glycerol (Compound 41) (37 g, 74%) as a yellow oil.