反应详情

温度

80 °C

Under an argon atmosphere, palladium acetate (295 mg) and tris(2-methylphenyl)phosphine (384 mg) were added to a suspension of (S)-2-(2,6-dichlorobenzamido)pent-4-enoic acid methyl ester (7.60 g), tetrahydro-4-(4-iodophenyl)-4-methoxy-2H-pyran (8.00 g) and potassium carbonate (5.21 g) in DMF (90 ml), and the resulting mixture was stirred at 80° C. for 2 hours. After cooling the reaction solution to room temperature, ethyl acetate was added thereto, and the resulting mixture was washed 3 times with water and once with saturated brine, followed by drying the organic layers over anhydrous sodium sulfate. After removing anhydrous sodium sulfate by filtration, the filtrate was concentrated. The residue was purified by column chromatography (silica gel, eluent: cyclohexane/chloroform=2/1→1/4). The obtained crudely purified product was further purified by column chromatography (silica gel, eluent: cyclohexane/ethyl acetate=4/1) to obtain (S,E)-2-(2,6-dichlorobenzamido)-5-[4-(4-methoxytetrahydropyran-4-yl)-phenyl]pent-4-enoic acid methyl ester (9.80 g).

1. temperatureAfter cooling the reaction solution to room temperature
2. washthe resulting mixture was washed 3 times with water
3. dry with materialby drying the organic layers over anhydrous sodium sulfate
4. customAfter removing anhydrous sodium sulfate
5. filtrationby filtration
6. concentrationthe filtrate was concentrated
7. customThe residue was purified by column chromatography (silica gel, eluent: cyclohexane/chloroform=2/1→1/4)
8. customThe obtained crudely purified product
9. customwas further purified by column chromatography (silica gel, eluent: cyclohexane/ethyl acetate=4/1)