Cesium carbonate → 2,7-Dichloro-6-(3,5-dimethoxyphenyl)quinazoline

Participants

Reaction Conditions

Reaction Steps

A mixture of 6-bromo-2,7-dichloroquinazoline (3 g, 10.8 mmol), 3,5-dimethoxyphenylboronic acid (2.2 g, 11.9 mmol), cesium carbonate (1.06 g, 32.4 mmol) and Pd(PPh3)2Cl2 (702 mg, 1.08 mmol) in THF (50 mL) and water (10 mL) was degassed with nitrogen three times, and the reaction mixture was stirred at 85° C. for 3 hours. The reaction mixture was cooled to room temperature and directly concentrated. The residue was purified by silica gel chromatography (petroleum ether:ethyl acetate=10:1˜4:1) to give the title compound (2.0 g, yield: 55%) as a yellowish solid. MS (ES+) requires: 334, 336, C16H12Cl2N2O2, found: 335, 337 [M+H]+.

Provenance & Evidence