L-(-)-Sorbose → Diacetone L-sorbose

HRID 358136

Reaktionsgleichung

Reaktionsgleichung von HRID 358136
[OH:1][CH2:2][C:3]([C@H:5]([C@@H:7]([C@H:9]([CH2:11][OH:12])[OH:10])[OH:8])[OH:6])=[O:4].I(Cl)(Cl)Cl>CC(C)=O>[CH3:2][C:3]1([CH3:5])[O:6][C@H:5]2[C@@H:7]3[O:8][C:9]([CH3:11])([CH3:7])[O:10][C@:9]3([CH2:11][OH:12])[O:4][C@H:3]2[CH2:2][O:1]1

Komponenten

4

Edukt 2

HCID 6904L-(-)-SorboseHCID 70076Iodine trichloride

Produkt 1

HCID 11043496Diacetone L-sorboseAusbeute 136,4 %

Reagenzien, Katalysatoren, Lösungsmittel 1

HCID 180AcetoneLösungsmittel

Reaktionsbedingungen

Temperatur
60 °C

Versuchsvorschrift

To 200 ml of acetone were added 10.0 g of L-sorbose and 234 mg of iodine trichloride and the mixture was refluxed with stirring in a water bath at 60° C. for 4 hours. During this reaction, the refluxing solvent was dried with 20 g of Molecular Sieves 3A interposed between the reaction vessel and the cooling jacket. The reaction mixture was then subjected to an after-treatment similar to that described in Example 11 to give 9.85 g (68.2%) of 2,3:4,6-di-O-isopropylidene-L-sorbofuranose (purity ≥98%).

Aufarbeitung

  1. temperaturethe mixture was refluxed
  2. customDuring this reaction
  3. dry with materialthe refluxing solvent was dried with 20 g of Molecular Sieves 3A

Quellen und Nachweise

ORD-Eintrag
ord-2aa910ccf5494878bee755818a809441
Quelldatensatz
uspto-grants-1984_08
Patentnummer
US04464530

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