反应详情

Tetrakis(triphenylphosphine)palladium(0) (50 mg) and potassium carbonate (2.0 M, 1.0 mL) are added to a stirred solution of {3-bromo-6-methoxy-5-[2-methoxy-4-(trifluoromethoxy)phenyl]pyrazin-2-yl}[(4-methoxyphenyl)methyl]amine (514 mg, 1.0 mmol) and ethylboronic acid (219 mg, 3.0 mmol) in toluene (8 mL). The mixture is heated to 85 C for 8 hours, cooled to room temperature, diluted with 2.0 M sodium hydroxide and extracted twice with 1:1 hexane-ethyl ether. The combined extracts are dried (sodium sulfate), filtered and concentrated. The residue is purified by flash chromatography, eluting with 20% ether in hexanes to give {3-ethyl-6-methoxy-5-[2-methoxy-4-(trifluoromethoxy)phenyl]pyrazin-2-yl}[(4-methoxyphenyl)methyl]amine (430 mg).

1. temperatureThe mixture is heated to 85 C for 8 hours
2. extractionextracted twice with 1:1 hexane-ethyl ether
3. dry with materialThe combined extracts are dried (sodium sulfate)
4. filtrationfiltered
5. concentrationconcentrated
6. customThe residue is purified by flash chromatography
7. washeluting with 20% ether in hexanes