反应详情

温度

100 °C

Into a 10000-mL 4-necked round-bottom flask purged and maintained with an inert atmosphere of nitrogen was placed a solution of (4-methoxyphenyl)boronic acid (350 g, 2.30 mol, 1.00 equiv) in 1,4-dioxane (3500 mL), methyl 4-bromo-3-methylbenzoate (527 g, 2.30 mol, 1.00 equiv), Pd(PPh3)4 (79.8 g, 69.06 mmol, 0.03 equiv), Cs2CO3 (1501 g, 4.60 mol, 2.00 equiv), water (850 mL). The resulting solution was stirred overnight at 100° C. in an oil bath. The reaction was then cooled and quenched by the addition of 3000 mL of water. The resulting solution was extracted with 2×2000 mL of ethyl acetate. The organic layers were combined, washed with 1×2000 mL of brine, dried and concentrated under vacuum. The residue was applied onto a silica gel column and eluted with ethyl acetate/petroleum ether (1:50-1:20). This resulted in 471.6 g (crude) of methyl 4-(4-methoxyphenyl)-3-methylbenzoate as a red solid.

1. customInto a 10000-mL 4-necked round-bottom flask purged
2. temperaturemaintained with an inert atmosphere of nitrogen
3. temperatureThe reaction was then cooled
4. customquenched by the addition of 3000 mL of water
5. extractionThe resulting solution was extracted with 2×2000 mL of ethyl acetate
6. washwashed with 1×2000 mL of brine
7. customdried
8. concentrationconcentrated under vacuum
9. washeluted with ethyl acetate/petroleum ether (1:50-1:20)
10. customThis resulted in 471.6 g (crude) of methyl 4-(4-methoxyphenyl)-3-methylbenzoate as a red solid