(2R, 3S)-N-[(tert-Butyloxy)carbonyl]-3-amino-4-phenyl-2-(triisopropylsilyloxy) butan-1-ol → (2R 3S)-N-[(tert-butyloxy)carbonyl]-3-amino-2-(triisopropylsilyloxy)-4-cyclohexyl-1-butanol

HRID 375142

Reaktionsgleichung

Reaktionsgleichung von HRID 375142
[C:1]([O:5][C:6]([NH:8][C@@H:9]([CH2:24][C:25]1[CH:30]=[CH:29][CH:28]=[CH:27][CH:26]=1)[C@@H:10]([O:13][Si:14]([CH:21]([CH3:23])[CH3:22])([CH:18]([CH3:20])[CH3:19])[CH:15]([CH3:17])[CH3:16])[CH2:11][OH:12])=[O:7])([CH3:4])([CH3:3])[CH3:2]>CO>[C:1]([O:5][C:6]([NH:8][C@@H:9]([CH2:24][CH:25]1[CH2:26][CH2:27][CH2:28][CH2:29][CH2:30]1)[C@@H:10]([O:13][Si:14]([CH:15]([CH3:16])[CH3:17])([CH:18]([CH3:19])[CH3:20])[CH:21]([CH3:22])[CH3:23])[CH2:11][OH:12])=[O:7])([CH3:2])([CH3:3])[CH3:4]

Komponenten

3

Edukt 1

HCID 15281982(2R, 3S)-N-[(tert-Butyloxy)carbonyl]-3-amino-4-phenyl-2-(triisopropylsilyloxy) butan-1-ol

Produkt 1

HCID 15281983(2R 3S)-N-[(tert-butyloxy)carbonyl]-3-amino-2-(triisopropylsilyloxy)-4-cyclohexyl-1-butanolAusbeute 67 %

Reagenzien, Katalysatoren, Lösungsmittel 1

HCID 887MethanolLösungsmittel

Versuchsvorschrift

The monosilylated diol of Step 2 was hydrogenated with 5% Rh-C at 60 psi and 60° C. in MeOH (135 mL). The mixture was filtered and the filtrate evaporated. The residue was purified by chromatography, eluting with (15% EtOAc in hexane) to give the title alcohol (8.70 g, 67% yield, mp 61°-63° C.). The 1H, 13C, and APT NMR spectral data were consistent with the proposed product.

Aufarbeitung

  1. filtrationThe mixture was filtered
  2. customthe filtrate evaporated
  3. customThe residue was purified by chromatography
  4. washeluting with (15% EtOAc in hexane)

Quellen und Nachweise

ORD-Eintrag
ord-cb44daf436ef4bfb8fb33e9d21ce7266
Quelldatensatz
uspto-grants-1996_01
Patentnummer
US05484812

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