Triethylamine → 2-(4-(4-(5-Chloro-1-methyl-1H-pyrazole-4-carbonyl)piperazin-1-yl)phenyl)-5,7-dimethoxyquinazolin-4(3H)-one

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Reaction Steps

To a mixture of 5,7-dimethoxy-2-(4-(piperazin-1-yl)phenyl)quinazolin-4(3H)-one (0.150 g, 0.41 mmol) and 5-chloro-1-methyl-1H-pyrazole-4-carbonyl chloride (0.073 g, 0.41 mmol) in CH2Cl2 (50 mL), was added Et3N (0.086 mL, 0.62 mmol) and the reaction stirred under nitrogen at room temperature for 1 hour. The residue was concentrated and purified by flash chromatography on silica gel, eluting with 70% CH2Cl2/(92:7:1 CHCl3/MeOH/concentrated NH4OH) to 100% (92:7:1 CHCl3/MeOH/concentrated NH4OH), to afford the title compound as a white solid (0.159 g, 76%). 1H NMR (500 MHz, DMSO-d6): δ 11.78 (s, 1H), 8.12 (d, J=9.0 Hz, 2H), 7.77 (s, 1H), 7.04 (d, J=9.1 Hz, 2H), 6.69 (d, J=2.3 Hz, 1H), 6.47 (d, J=2.3 Hz, 1H), 3.88 (s, 3H), 3.80-3.87 (m, 6H), 3.63-3.80 (m, 4H), 3.38-3.44 (m, 4H). APCI MS m/z 509 [M+H]+.

Provenance & Evidence