反应详情

A degassed mixture of 5-methyl-4-[4-(4,4,5,5-tetramethyl-[1,3,2]dioxaborolan-2-yl)-phenoxymethyl]-furan-2-carboxylic acid methyl ester (119) (200 mg, 0.54 mmoles), 1-bromo-2-methoxy-benzene (80 μl, 0.65 mmoles), 2M aqueous cesium carbonate (11.0 ml) and), [1,1′-bis(diphenylphosphino) ferrocene]dichloropalladium(II) complex with dichloromethane (1:1) (44 mg) in 1,4-dioxan (30 ml), under an argon atmosphere was heated at 95° C. for 18 hours. After cooling, the mixture was concentrated, the residue dissolved in ethyl acetate and washed with brine and dried. After evaporation of the solvent, the residue was purified by flash chromatography using cyclohexane/ethyl acetate 9:1 v/v as eluent to afford compound 125 (40 mg) as an oil. LC/MS System A; Rt=4.14 mins, m/z (ES+)=353 weak (M+H for C21H20O5).

1. temperatureAfter cooling
2. concentrationthe mixture was concentrated
3. dissolutionthe residue dissolved in ethyl acetate
4. washwashed with brine
5. customdried
6. customAfter evaporation of the solvent
7. customthe residue was purified by flash chromatography