Benzyl Alcohol → (2RS,3SR)-2-benzyloxycarbonyl-5-oxotetrahydrofuran-3-carboxylic acid

HRID 581043

Reaktionsgleichung

Reaktionsgleichung von HRID 581043
[O:1]=[C:2]1[O:6][CH:5]([C:7]([OH:9])=[O:8])[CH:4]([C:10]([OH:12])=[O:11])[CH2:3]1.C1(N=C=NC2CCCCC2)CCCCC1.[CH2:28](O)[C:29]1[CH:34]=[CH:33][CH:32]=[CH:31][CH:30]=1>CC(C)=O>[CH2:28]([O:8][C:7]([CH:5]1[CH:4]([C:10]([OH:12])=[O:11])[CH2:3][C:2](=[O:1])[O:6]1)=[O:9])[C:29]1[CH:34]=[CH:33][CH:32]=[CH:31][CH:30]=1

Komponenten

5

Edukt 3

HCID 244Benzyl AlcoholHCID 10868DicyclohexylcarbodiimideHCID 98259Tetrahydro-5-oxofuran-2,3-dicarboxylic acid

Produkt 1

HCID 18705291(2RS,3SR)-2-benzyloxycarbonyl-5-oxotetrahydrofuran-3-carboxylic acid

Reagenzien, Katalysatoren, Lösungsmittel 1

HCID 180AcetoneLösungsmittel

Versuchsvorschrift

5.3 g of (2RS,3SR)-5-oxotetrahydrofuran-2,3-dicarboxylic acid was dissolved in 90 ml of acetone, and 6.6 g of N,N'-dicyclohexylcarbodiimide was added thereto, followed by stirring at room temperature for 2.5 hours. 3.3 ml of benzyl alcohol was added to the reaction solution, followed by stirring at the same temperature for 2 days. Insoluble matters were filtered off, and then the filtrate was concentrated under reduced pressure. The residue was purified by silica gel column chromatography (hexane/ethyl acetate=4/1+chloroform/methanol=50/1) to obtain 6.55 g of the above-identified compound as a yellow solid.

Aufarbeitung

  1. stirringby stirring at the same temperature for 2 days
  2. filtrationInsoluble matters were filtered off
  3. concentrationthe filtrate was concentrated under reduced pressure
  4. customThe residue was purified by silica gel column chromatography (hexane/ethyl acetate=4/1+chloroform/methanol=50/1)

Quellen und Nachweise

ORD-Eintrag
ord-ec1dfca3ad4d4dd08be4353809871e80
Quelldatensatz
uspto-grants-1999_07
Patentnummer
US05919786

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