Water → 3-Formylchromone

HRID 436278

Reaction equation

HRID 436278 reaction equation
[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]

Participants

4

Reactant 2

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

Product 1

HCID 871123-Formylchromone

Reagents, catalysts & solvents 1

HCID 944Nitric AcidSolvent

Conditions

Temperature
25 °C

Procedure

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 5 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°.

Workup

  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

Sources & evidence

ORD record
ord-854b5559993e4acc9f7bd78eb146b881
Source dataset
uspto-grants-1977_02
Patent number
US04008252

Linked notes

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