Potassium periodate → 7-Acetoxy-8-methoxycoumarin-6-acetaldehyde

HRID 66073

Reaktionsgleichung

Reaktionsgleichung von HRID 66073
[C:1]([O:4][C:5]1[C:14]([O:15][CH3:16])=[C:13]2[C:8]([CH:9]=[CH:10][C:11](=[O:17])[O:12]2)=[CH:7][C:6]=1[CH2:18][CH:19]=C)(=[O:3])[CH3:2].I([O-])(=O)(=O)=[O:22].[K+]>[Os](=O)(=O)(=O)=O.CCOC(C)=O.O>[C:1]([O:4][C:5]1[C:14]([O:15][CH3:16])=[C:13]2[C:8]([CH:9]=[CH:10][C:11](=[O:17])[O:12]2)=[CH:7][C:6]=1[CH2:18][CH:19]=[O:22])(=[O:3])[CH3:2]

Komponenten

5

Edukt 2

HCID 516896Potassium periodateHCID 218145017-Acetoxy-6-allyl-8-methoxycoumarin

Produkt 1

HCID 537672567-Acetoxy-8-methoxycoumarin-6-acetaldehyde

Reagenzien, Katalysatoren, Lösungsmittel 2

HCID 30318Osmium TetroxideKatalysatorHCID 22728543Water ethylacetateLösungsmittel

Versuchsvorschrift

A solution of 0.274g. (0.001 mole) of 7-acetoxy-6-allyl-8-methoxycoumarin in 10 ml. EtOAc/water, 1:1 was treated with 0.8 g. (.0033 mole) of potassium periodate and 0.5 ml. of a 10% aqueous solution of osmium tetroxide (10 mg. OsO4 /ml H2O). The reactants were stirred at 25° for 5.0 hours. The organic layer was separated, and the aqueous phase was further extracted with ethyl acetate. The organic extracts were combined, dried over sodium sulfate, and evaporated to yield pure 7-acetoxy-8-methoxycoumarin-6-acetaldehyde as a colorless oil.

Aufarbeitung

  1. customThe organic layer was separated
  2. extractionthe aqueous phase was further extracted with ethyl acetate
  3. dry with materialdried over sodium sulfate
  4. customevaporated

Quellen und Nachweise

ORD-Eintrag
ord-114648409cd6424fb94fc756031f3ca9
Quelldatensatz
uspto-grants-1978_12
Patentnummer
US04130568

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