反应详情

温度

80 °C

To a solution of 1-bromo-2-nitrobenzene (2.0 g), palladium(II) acetate (112 mg) and 2-(di-tert-butylphosphino)biphenyl (150 mg) in acetonitrile (20 ml) were sequentially added 4-acetoxystyrene (1.7 ml) and N,N-diisopropylethylamine (5 ml) under a nitrogen atmosphere, and the solution was stirred for 3 hours at 80° C. The solution was extracted with ethyl acetate, then sequentially washed with water and brine, dried over anhydrous magnesium sulfate, and then the solvent was evaporated in vacuo. Obtained by purifying the residue by silica gel column chromatography (hexane-ethyl acetate system), acetic acid 4-[2-(2-nitrophenyl)vinyl]phenyl ester (840 mg) was used according to an analogous synthetic method to Example 57 to provide the title compound (330 mg).

1. extractionThe solution was extracted with ethyl acetate
2. washsequentially washed with water and brine
3. dry with materialdried over anhydrous magnesium sulfate
4. customthe solvent was evaporated in vacuo
5. customObtained
6. customby purifying the residue by silica gel column chromatography (hexane-ethyl acetate system), acetic acid 4-[2-(2-nitrophenyl)vinyl]phenyl ester (840 mg)