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

関与物質

反応手順

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 h. LCMS showed the reaction was completed. The reaction was cooled to RT, 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]+.

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