Dimethylformamide → HCID 20563052, compound

HRID 613982

Reaction equation

HRID 613982 reaction equation
N[C:2]1[O:3][C:4]2[CH:14]=[CH:13][CH:12]=[CH:11][C:5]=2[C:6](=[O:10])[C:7]=1C=O.[C:15]([C:17]#[CH:18])#[N:16].[CH3:19][N:20](C)C=O>>[C:15]([C:17]1[CH:19]=[N:20][C:7]2[C:6](=[O:10])[C:5]3[C:4]([O:3][C:2]=2[CH:18]=1)=[CH:14][CH:13]=[CH:12][CH:11]=3)#[N:16]

Participants

4

Reactant 3

HCID 6228DimethylformamideHCID 140552-PropynenitrileHCID 7359282-Amino-3-formylchromone

Product 1

HCID 20563052HCID 20563052, compound

Conditions

Temperature
140 °C

Procedure

To 70 ml of dimethylformamide was added 2.2 g of 2-amino-4-oxo-4H-1-benzopyran-3-carboxaldehyde, followed by the addition of 2.5 g of cyanoacetylene. The mixture was heated under stirring at 140° C. for 15 hours and the solvent was then distilled off under reduced pressure. The residue was chromatographed on silica gel and eluted with chloroform and recrystallized from acetonitrile to give 0.83 g of 3-cyano-1-azaxanthone as crystals, m.p. 220°-226° C.

Workup

  1. temperatureThe mixture was heated
  2. distillationthe solvent was then distilled off under reduced pressure
  3. customThe residue was chromatographed on silica gel
  4. washeluted with chloroform
  5. customrecrystallized from acetonitrile

Sources & evidence

ORD record
ord-53216e11e18842ada0acdfc09a4e3e2b
Source dataset
uspto-grants-1979_03
Patent number
US04143042

Linked notes

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