Phosphorus oxychloride → 6-Bromo-2-chloro-7-methoxyquinazoline

HRID 56484Notes

Reaction equation

HRID 56484 reaction equation
[Br:1][C:2]1[CH:3]=[C:4]2[C:9](=[CH:10][C:11]=1[O:12][CH3:13])[N:8]=[C:7](O)[N:6]=[CH:5]2.P(Cl)(Cl)([Cl:17])=O>>[Br:1][C:2]1[CH:3]=[C:4]2[C:9](=[CH:10][C:11]=1[O:12][CH3:13])[N:8]=[C:7]([Cl:17])[N:6]=[CH:5]2

Participants

3

Reactant 2

HCID 24813Phosphorus oxychlorideHCID 178486882HCID 178486882, compound

Product 1

HCID 591992766-Bromo-2-chloro-7-methoxyquinazolineYield 75%

Procedure

To a solution of 6-bromo-7-methoxyquinazolin-2-ol (3.0 g, 11.8 mmol) in phosphoryl trichloride (30 mL) was refluxed at 130° C. for 5 hours. The reaction was cooled to room temperature, and most of phosphoryl trichloride was evaporated. The residue was dropwise added to ice water (100 mL), and the resulting precipitate was collected via filtration to give the title compound as a yellow solid (2.4 g, 75%). MS (ES+) C9H6BrClN2O requires: 272, 274, found: 273, 275 [M+H]+.

Workup

  1. custommost of phosphoryl trichloride was evaporated
  2. additionThe residue was dropwise added to ice water (100 mL)
  3. filtrationthe resulting precipitate was collected via filtration

Sources & evidence

ORD record
ord-54f87fe5431647338e937c62ae14b6cb
Source dataset
uspto-grants-2016_09
Patent number
US09434700B2

Reaction notes

Loading…