tert-Butyl methyl ether → (2S,3S)-3-(3-bromophenyl)-2-methyl-3-(trimethylsilyloxy)propan-1-ol

HRID 2098554Notizen

Reaktionsgleichung

Reaktionsgleichung von HRID 2098554
C([C@H]1COC(=O)N1[C:14](=[O:30])[C@H:15]([CH3:29])[C@@H:16]([C:22]1[CH:27]=[CH:26][CH:25]=[C:24]([Br:28])[CH:23]=1)[O:17][Si:18]([CH3:21])([CH3:20])[CH3:19])C1C=CC=CC=1.[Li+].[BH4-].[NH4+].[Cl-].CC(OC)(C)C>C1COCC1>[Br:28][C:24]1[CH:23]=[C:22]([C@@H:16]([O:17][Si:18]([CH3:20])([CH3:19])[CH3:21])[C@@H:15]([CH3:29])[CH2:14][OH:30])[CH:27]=[CH:26][CH:25]=1

Komponenten

6

Edukt 4

HCID 15413tert-Butyl methyl etherHCID 25517Ammonium ChlorideHCID 4148881Lithium borohydrideHCID 66743729(S)-4-benzyl-3-((2R,3S)-3-(3-bromophenyl)-2-methyl-3-(trimethylsilyloxy)propanoyl)oxazolidin-2-one

Produkt 1

HCID 57956785(2S,3S)-3-(3-bromophenyl)-2-methyl-3-(trimethylsilyloxy)propan-1-ol

Reagenzien, Katalysatoren, Lösungsmittel 1

HCID 8028TetrahydrofuranLösungsmittel2×

Versuchsvorschrift

To a solution of (S)-4-benzyl-3-((2R,3S)-3-(3-bromophenyl)-2-methyl-3-(trimethylsilyloxy)propanoyl)oxazolidin-2-one in anhydrous THF is added a solution of LiBH4 in THF under argon. The reaction mixture is stirred for 18 h at room temperature and a saturated aqueous solution of NH4Cl is slowly added followed by MTBE. The mixture is stirred for 15 mins, layers are separated, organic layer is washed with brine, dried over anhydrous MgSO4, filtered and concentrated under reduced pressure. The residue is purified by flash chromatography (5 to 40% EtOAc/hexane gradient) to give (2S,3S)-3-(3-bromophenyl)-2-methyl-3-(trimethylsilyloxy)propan-1-ol.

Aufarbeitung

  1. stirringThe mixture is stirred for 15 mins
  2. customlayers are separated
  3. washorganic layer is washed with brine
  4. dry with materialdried over anhydrous MgSO4
  5. filtrationfiltered
  6. concentrationconcentrated under reduced pressure
  7. customThe residue is purified by flash chromatography (5 to 40% EtOAc/hexane gradient)

Quellen und Nachweise

ORD-Eintrag
ord-371a1459e84345c783c8bd916b0f500f
Quelldatensatz
uspto-grants-2013_05
Patentnummer
US08450527B2

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