反应详情

温度

60 °C

A mixture of 2-bromo-5-chloro-4-(trifluoromethyl)aniline (17.1 g), trimethylsilylacetylene (14.8 ml), bistriphenylphosphinepalladium dichloride (816 mg) and triethylamine (115 ml) was stirred at 60° C. for 9 hr. The reaction mixture was ice-cooled, diethyl ether was added and the mixture was filtered through a celite (trademark) filter. The filtrate was evaporated under reduced pressure to give a brown oil. The oil was purified by silica gel column chromatography (elution solvent:ethyl acetate-hexane (1:20-1:10)) to give 5-chloro-4-(trifluoromethyl)-2-[(trimethylsilyl)ethynyl]aniline (16.5 g, yield 92%).

1. temperaturecooled
2. filtrationthe mixture was filtered through a celite (trademark)
3. filtrationfilter
4. customThe filtrate was evaporated under reduced pressure
5. customto give a brown oil
6. customThe oil was purified by silica gel column chromatography (elution solvent:ethyl acetate-hexane (1:20-1:10))