Sodium Thiosulfate → 2,6-Anhydro-5-azido-1-O-[tert-butyl(dimethyl)silyl]-4,5-dideoxy-L-erythro-hex-3-ulose

HRID 470705Notizen

Reaktionsgleichung

Reaktionsgleichung von HRID 470705
CC(OI1(OC(C)=O)(OC(C)=O)OC(=O)C2C=CC=CC1=2)=O.[N:23]([C@@H:26]1[CH2:31][C@H:30]([OH:32])[C@@H:29]([CH2:33][O:34][Si:35]([C:38]([CH3:41])([CH3:40])[CH3:39])([CH3:37])[CH3:36])[O:28][CH2:27]1)=[N+:24]=[N-:25].S([O-])([O-])(=O)=S.[Na+].[Na+]>ClCCl>[N:23]([C@H:26]1[CH2:27][O:28][C@H:29]([CH2:33][O:34][Si:35]([C:38]([CH3:39])([CH3:40])[CH3:41])([CH3:37])[CH3:36])[C:30](=[O:32])[CH2:31]1)=[N+:24]=[N-:25]

Komponenten

5

Edukt 3

HCID 24477Sodium ThiosulfateHCID 159087TriacetoxyperiodinaneHCID 866726081,5-Anhydro-2-azido-6-O-[tert-butyl(dimethyl)silyl]-2,3-dideoxy-D-ribo-hexitol

Produkt 1

HCID 866726102,6-Anhydro-5-azido-1-O-[tert-butyl(dimethyl)silyl]-4,5-dideoxy-L-erythro-hex-3-uloseAusbeute 76,2 %

Reagenzien, Katalysatoren, Lösungsmittel 1

HCID 6344DichloromethaneLösungsmittel

Versuchsvorschrift

A Dess-Martin reagent (876 mg, 2.00 mmol) was added to a dichloromethane (10 ml) solution of 1,5-anhydro-2-azido-6-O-[tert-butyl(dimethyl)silyl]-2,3-dideoxy-D-ribo-hexitol (450 mg, 1.25 mmol) under ice cooling and the resulting mixture was stirred for 75 minutes. Aqueous sodium thiosulfate solution was added under ice cooling, then the resulting mixture was subjected to extraction with ether and the organic layer was washed with brine. The organic layer was dried over anhydrous sodium sulfate, then the solvent was evaporated under reduced pressure and the residue was purified by silica gel column chromatography [n-hexane:ethyl acetate=50:1→20:1 (v/v)] to give 272 mg (76%) of the title compound as a colorless oil.

Aufarbeitung

  1. extractionthe resulting mixture was subjected to extraction with ether
  2. washthe organic layer was washed with brine
  3. dry with materialThe organic layer was dried over anhydrous sodium sulfate
  4. customthe solvent was evaporated under reduced pressure
  5. customthe residue was purified by silica gel column chromatography [n-hexane:ethyl acetate=50:1→20:1 (v/v)]

Quellen und Nachweise

ORD-Eintrag
ord-7d4a8841c37049cb857eea5164869265
Quelldatensatz
uspto-grants-2014_01
Patentnummer
US08629133B2

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