Cerous carbonate → 2-Chloro-6-(3,5-dimethoxyphenyl)-5-fluoroquinazoline

Beteiligte Stoffe

Reaktionsbedingungen

Reaktionsschritte

A mixture of 6-bromo-2-chloro-5-fluoroquinazoline (1.5 g, 5.74 mmol), 3,5-dimethoxyphenylboronic acid (1.15 g, 6.31 mmol), cerium carbonate (1.87 g, 5.74 mmol) and bis(tri-tert-butylphosphine)palladium (148 mg, 0.29 mmol) in THF (30 mL) and water (3 mL) was degassed with nitrogen for three times and stirred at 80° C. overnight. The mixture was cooled to room temperature and extracted with ethyl acetate (3×200 mL). The combined organic layers were washed with water and brine, dried over sodium sulfate, filtered and concentrated. The residue was purified by silica gel chromatography (petroleum ether:ethyl acetate=8:1) to get the title product as a white solid (1.3 g, 70%). MS (ES+) C16H12ClFN2O2 requires: 318, found: 319, 321 [M+H]+.

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