Water → 3-Formylchromone

HRID 866339

Reaktionsgleichung

Reaktionsgleichung von HRID 866339
[OH:1][CH2:2][C:3]1[C:12](=[O:13])[C:11]2[C:6](=[CH:7][CH:8]=[CH:9][CH:10]=2)[O:5][CH:4]=1.O>[N+]([O-])(O)=O>[CH:2]([C:3]1[C:12](=[O:13])[C:11]2[C:6](=[CH:7][CH:8]=[CH:9][CH:10]=2)[O:5][CH:4]=1)=[O:1]

Komponenten

4

Edukt 2

HCID 962WaterHCID 113557983-(hydroxymethyl)-4H-chromen-4-one

Produkt 1

HCID 871123-Formylchromone

Reagenzien, Katalysatoren, Lösungsmittel 1

HCID 944Nitric AcidLösungsmittel

Reaktionsbedingungen

Temperatur
25 °C

Versuchsvorschrift

A quantity of 35.2 g. (0.2 mole) of 3-(hydroxymethyl)chromone is dissolved in 250 ml of concentrated nitric acid with stirring at 25° C. There is no initial heat of reaction. The temperature gradually rises to 30° C over the next several minutes and is kept there for about five minutes with ice-acetone bath cooling. Water, 600 ml, is added to the reaction solution. The separated, pale yellow solid is filtered, washed well with water and dried to give 25 g. of crude aldehyde melting at 145°-148°.

Aufarbeitung

  1. temperatureno initial heat of reaction
  2. customgradually rises to 30° C over the next several minutes
  3. temperaturecooling
  4. filtrationThe separated, pale yellow solid is filtered
  5. washwashed well with water
  6. customdried
  7. customto give 25 g

Quellen und Nachweise

ORD-Eintrag
ord-f9cb4f5f974a41769ac715fee52a55f0
Quelldatensatz
uspto-grants-1978_07
Patentnummer
US04098799

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