ethyl (S)-alpha-(t-butyldimethylsilyloxy)-alpha-phenylacetate → (S)-alpha-(t-Butyldimethylsilyloxy)-alpha-phenylacetaldehyde

HRID 1682749Notizen

Reaktionsgleichung

Reaktionsgleichung von HRID 1682749
[Si:1]([O:8][C@@H:9]([C:15]1[CH:20]=[CH:19][CH:18]=[CH:17][CH:16]=1)[C:10](OCC)=[O:11])([C:4]([CH3:7])([CH3:6])[CH3:5])([CH3:3])[CH3:2].[H-].C([Al+]CC(C)C)C(C)C>CCCCCC>[Si:1]([O:8][C@@H:9]([C:15]1[CH:16]=[CH:17][CH:18]=[CH:19][CH:20]=1)[CH:10]=[O:11])([C:4]([CH3:7])([CH3:6])[CH3:5])([CH3:3])[CH3:2]

Komponenten

4

Edukt 2

HCID 10968419ethyl (S)-alpha-(t-butyldimethylsilyloxy)-alpha-phenylacetateHCID 21225700Diisobutylaluminumhydride

Produkt 1

HCID 11075902(S)-alpha-(t-Butyldimethylsilyloxy)-alpha-phenylacetaldehyde

Reagenzien, Katalysatoren, Lösungsmittel 1

HCID 8058HexaneLösungsmittel2×

Versuchsvorschrift

Following a procedure similar to that described in Preparation 25, but using 8.8 g of ethyl (S)-α-(t-butyldimethylsilyloxy)-α-phenylacetate (prepared as described in Preparation 24), 300 ml of dry hexane and 30 ml of a 1M solution of diisobutylaluminum hydride in hexane, and then purifying the reaction product by column chromatography through silica gel, using a 1:60 by volume mixture of ethyl acetate and hexane as the eluent, the title compound was obtained having an Rf=0.29 (thin layer chromatography over silica gel, using a 1:80 by volume mixture of ethyl acetate and hexane as the developing solvent).

Aufarbeitung

  1. customthat described in Preparation 25
  2. custompurifying the reaction product by column chromatography through silica gel
  3. additionby volume mixture of ethyl acetate and hexane as the eluent

Quellen und Nachweise

ORD-Eintrag
ord-30e3ad79da12441a994592394f5ec6b8
Quelldatensatz
uspto-grants-1997_06
Patentnummer
US05635534

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