Imidazole → [(1S)-1-(t-butyldiphenylsilyloxymethyl)propyl]carbamic acid benzyl ester

HRID 891631Notizen

Reaktionsgleichung

Reaktionsgleichung von HRID 891631
[CH2:1]([O:8][C:9](=[O:16])[NH:10][C@H:11]([CH2:14][OH:15])[CH2:12][CH3:13])[C:2]1[CH:7]=[CH:6][CH:5]=[CH:4][CH:3]=1.[Si:17](Cl)([C:30]([CH3:33])([CH3:32])[CH3:31])([C:24]1[CH:29]=[CH:28][CH:27]=[CH:26][CH:25]=1)[C:18]1[CH:23]=[CH:22][CH:21]=[CH:20][CH:19]=1.N1C=CN=C1>CN(C)C=O>[CH2:1]([O:8][C:9](=[O:16])[NH:10][C@H:11]([CH2:14][O:15][Si:17]([C:30]([CH3:33])([CH3:32])[CH3:31])([C:24]1[CH:25]=[CH:26][CH:27]=[CH:28][CH:29]=1)[C:18]1[CH:23]=[CH:22][CH:21]=[CH:20][CH:19]=1)[CH2:12][CH3:13])[C:2]1[CH:7]=[CH:6][CH:5]=[CH:4][CH:3]=1

Komponenten

5

Edukt 3

HCID 795ImidazoleHCID 94078tert-ButyldiphenylchlorosilaneHCID 10263004benzyl N-((2S)-1-hydroxybutan-2-yl)carbamate

Produkt 1

HCID 60109785[(1S)-1-(t-butyldiphenylsilyloxymethyl)propyl]carbamic acid benzyl esterAusbeute 107,5 %

Reagenzien, Katalysatoren, Lösungsmittel 1

HCID 6228DimethylformamideLösungsmittel

Versuchsvorschrift

Subsequently, to a solution of [(1S)-1-(hydroxymethyl)propyl]carbamic acid benzyl ester (4.27 g, 19.1 mmol) in dimethylformamide (128 ml) were added t-butyldiphenylsilyl chloride (5.97 ml, 22.9 mmol) and imidazole (1.56 g, 22.9 mmol) in an ice bath. The mixture was stirred at room temperature overnight. After checking the completion of the reaction, the reaction mixture was partitioned between ethyl acetate and 10% aqueous sodium chloride solution. The organic layer was washed successively with saturated aqueous sodium hydrogencarbonate solution and saturated aqueous sodium chloride solution, dried over anhydrous sodium sulfate, filtered and concentrated under reduced pressure. The residue was purified by chromatography on a silica gel column using n-hexane:ethyl acetate (6:1→4:1) as the eluant to afford [(1S)-1-(t-butyldiphenylsilyloxymethyl)propyl]carbamic acid benzyl ester (9.48 g, yield 100%) as a white solid.

Aufarbeitung

  1. customthe completion of the reaction
  2. customthe reaction mixture was partitioned between ethyl acetate and 10% aqueous sodium chloride solution
  3. washThe organic layer was washed successively with saturated aqueous sodium hydrogencarbonate solution and saturated aqueous sodium chloride solution
  4. dry with materialdried over anhydrous sodium sulfate
  5. filtrationfiltered
  6. concentrationconcentrated under reduced pressure
  7. customThe residue was purified by chromatography on a silica gel column

Quellen und Nachweise

ORD-Eintrag
ord-8d99b719df7a411a8fc98cb0fdfab74f
Quelldatensatz
uspto-grants-2006_02
Patentnummer
US07001897B2

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