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Potassium Carbonate → HCID 10272690, Verbindung

HRID 2307734
Notizen
Druckvorschau

Reaktionsgleichung

Reaktionsgleichung von HRID 2307734
[C:1]([O:4][C@H:5]1[C@@H:11]([O:12][C:13](=[O:15])[CH3:14])[C@H:10]([O:16][C:17](=[O:19])[CH3:18])[C@@H:9]([CH2:20][O:21][C:22](=[O:24])[CH3:23])[O:8][CH:6]1[OH:7])(=[O:3])[CH3:2].C(=O)([O-])[O-].[K+].[K+].C([O:38][C:39](=[O:42])[CH2:40]Br)C1C=CC=CC=1.COC(C)(C)C>S([O-])(O)(=O)=O.C([N+](CCCC)(CCCC)CCCC)CCC.O1CCOCC1>[C:1]([O:4][C@H:5]1[C@@H:11]([O:12][C:13](=[O:15])[CH3:14])[C@H:10]([O:16][C:17](=[O:19])[CH3:18])[C@@H:9]([CH2:20][O:21][C:22](=[O:24])[CH3:23])[O:8][CH:6]1[O:7][CH2:40][C:39]([OH:42])=[O:38])(=[O:3])[CH3:2]
KomponentenReaktionsbedingungenVersuchsvorschriftAufarbeitungQuellen und NachweiseNotizen zur Reaktion

Komponenten

7

Edukt 4

HCID 11430Potassium CarbonateHCID 15413tert-Butyl methyl etherHCID 62576Benzyl bromoacetateHCID 117598232,3,4,6-TETRA-O-ACETYL-D-MANNOPYRANOSE

Produkt 1

HCID 10272690HCID 10272690, Verbindung

Reagenzien, Katalysatoren, Lösungsmittel 2

HCID 94433
Tetrabutylammonium hydrogen sulfate
Katalysator
HCID 312751,4-DioxaneLösungsmittel

Reaktionsbedingungen

Temperatur
0 °C

Versuchsvorschrift

A mixture that consists of 34.83 g (100 mmol) of 2,3,4,6-tetra-O-acetyl-mannopyranose, 1.70 g (5 mmol) of tetrabutylammonium hydrogen sulfate and 82.93 g (600 mmol) of fine-powder potassium carbonate in 350 ml of dioxane is cooled to 0° C. At 0° C., 34.36 g (150 mmol) of bromoacetic acid benzyl ester is added in drops over 10 minutes while being stirred vigorously. It is stirred for one hour at 0° C. 250 ml of MTB (methyl-tert-butyl ether) is added, solid is filtered out, and the filtrate is evaporated to the dry state in a vacuum. The residue is taken up in 500 ml of ethanol. 5 g of palladium (10%) on activated carbon is added thereto and hydrogenated until no more hydrogen is taken up by the solution. Catalyst is filtered out, it is rewashed with ethanol, and the combined solutions are evaporated to the dry state in a vacuum.

Aufarbeitung

  1. stirringIt is stirred for one hour at 0° C
  2. filtrationsolid is filtered out
  3. customthe filtrate is evaporated to the dry state in a vacuum
  4. addition5 g of palladium (10%) on activated carbon is added
  5. filtrationCatalyst is filtered out
  6. customthe combined solutions are evaporated to the dry state in a vacuum

Quellen und Nachweise

ORD-Eintrag
ord-a4e7ed4d94624b7cb647fe21af629e3d
Quelldatensatz
uspto-grants-2004_12
DOI
10.6084/m9.figshare.5104873.v1
Patentnummer
US06831164B2

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