反应详情

Tetrakis(triphenylphosphine)palladium(0) (100 mg) and potassium carbonate (2.0 M, 2.0 mL) are added to a stirred solution of (5-bromo-6-methoxypyrazin-2-yl)[(4-methoxyphenyl)methyl]amine (0.80 g, 2.50 mmol) and 2-methoxy-4-trifluoromethoxy benzeneboronic acid (1.75 g, 7.5 mmol) in toluene (25 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 60% hexanes in ether to give {6-methoxy-5-[2-methoxy-4-(trifluoromethoxy)phenyl]pyrazin-2yl}[(4-methoxyphenyl)methyl]amine (967 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 60% hexanes in ether