反应详情

Bis(dibenzylideneacetone)palladium (0.63 g) and (2′-dicyclohexylphosphanyl-biphenyl-2-yl)-dimethyl-amine (0.68 g) were added to dry toluene (100 mL purged with argon) and stirred for 15 minutes under argon. Potassium tert-butoxide (3.70 g), morpholine (4.0 mL) and 4-bromo-2-methoxy-6-methyl-phenylamine (3.40 g) were added subsequently. The reaction mixture was heated to reflux for 16 hours under argon, cooled and filtered through silica (50 g). Sodium hydroxide (2 M, 200 mL) was added and the mixture was extracted with ethyl acetate (3×200 mL). The combined organic phases were washed with brine (1×200 mL), dried over magnesium sulfate and concentrated in vacuo. The crude product was purified by flash chromatography to furnish 1.0 g (29% yield) of the title compound as a black oil. 1H NMR (500 MHz, DMSO-d6): 2.05 (s, 3H), 2.91 (t, 4H), 3.69 (t, 4H), 3.74 (s, 3H), 3.95 (s, 2H), 6.23 (d, 1H), 6.39 (d, 1H).

1. temperatureThe reaction mixture was heated
2. temperatureto reflux for 16 hours under argon
3. temperaturecooled
4. filtrationfiltered through silica (50 g)
5. additionSodium hydroxide (2 M, 200 mL) was added
6. extractionthe mixture was extracted with ethyl acetate (3×200 mL)
7. washThe combined organic phases were washed with brine (1×200 mL)
8. dry with materialdried over magnesium sulfate
9. concentrationconcentrated in vacuo
10. customThe crude product was purified by flash chromatography