N,N-Dimethylaniline → HCID 21077807, compound

HRID 1171623Notes

Reaction equation

HRID 1171623 reaction equation
P(Cl)(Cl)([Cl:3])=O.CN(C)C1C=CC=CC=1.[CH3:15][O:16][C:17]1[CH:18]=[C:19]2[C:24](=[CH:25][CH:26]=1)[N:23]=[N:22][CH:21]=[C:20]2O>>[CH3:15][O:16][C:17]1[CH:18]=[C:19]2[C:24](=[CH:25][CH:26]=1)[N:23]=[N:22][CH:21]=[C:20]2[Cl:3]

Participants

4

Reactant 3

HCID 949N,N-DimethylanilineHCID 24813Phosphorus oxychlorideHCID 178488188HCID 178488188, compound

Product 1

HCID 21077807HCID 21077807, compoundYield 59%

Procedure

Phosphorous oxychloride (5 ml) was added to a mix of dimethylaniline (157 mg, 1.3 mmol) and 6-methoxy-4-hydroxycinnoline (208 mg, 1.2 mmol). The reaction was heated at reflux for 15 min, then cooled and concentrated under vacuum. The residue was partitioned between chloroform (100 ml) and water (30 ml), then the organic layer was washed with brine and dried (Na2SO4). Chromatography of the residue adsorbed onto silica gel (3 g) on silica gel (15 g) eluent CH2Cl2 to 10% Ethylacetate/CH2Cl2 gave 6-methoxy-4-chlorocinnoline (135 mg, 0.7 mmol) in 59% yield as white yellow solid. δH (CDCl3)=4.03 (s, 3H); 7.28 (d, 1H); 7.51 (dd, 1H); 8.41 (d, 1H) and 9.22 (br s, 1H). MS (ESI) (M+H)+ 195.

Workup

  1. temperatureThe reaction was heated
  2. temperatureat reflux for 15 min
  3. temperaturecooled
  4. concentrationconcentrated under vacuum
  5. customThe residue was partitioned between chloroform (100 ml) and water (30 ml)
  6. washthe organic layer was washed with brine
  7. dry with materialdried (Na2SO4)

Sources & evidence

ORD record
ord-4fc1512376144e068ad148f42c0d9afd
Source dataset
uspto-grants-2010_11
Patent number
US07829705B2

Reaction notes

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