反应详情

温度

80 °C

3-(1-Benzenesulfonyl-3-iodo-1H-indol-5-yl)-but-2-enoic acid methyl ester (653 mg, 1.35 mmol) and (2-butoxy-3,5-diisopropylphenyl)-boronic acid (415 mg, 1.49 mmol) were dissolved in toluene (8 mL) under a nitrogen atmosphere. Tetrakis(triphenylphosphine) palladium (172 mg, 0.15 mmol) and 2N Na2CO3 (2.7 mL) was added and the biphasic mixture stirred at 80° C. for 6 h. The reaction was judged complete by TLC (9:1) in hexane:ethyl acetate but was allowed to stir overnight at room temperature. The reaction was diluted with water (5 mL)/ethyl acetate (15 mL). The layers were separated and the aqueous washed with ethyl acetate (10 mL). The organic portions were passed through a pad of Celite, dried (MgSO4), filtered and concentrated in vacuo to provide 1.20 g of a dark brown oil. Chromatography (SiO2, hexanes/ethyl acetate) provided 294 mg (37%) of a yellow foam. 1H NMR (250 MHz, CDCl3): δ 8.06 (d, 1H, J=8.7), 7.94 (m, 2H), 7.80 (s, 1H), 7.75 (d, 1H, J=1.7), 7.56-7.45 (m, 4H), 7.13 (m, 2H), 6.14 (d, 1H, J=1.2), 3.75 (s, 3H), 3.39 (sep, 1H, J=6.9), 3.29 (t, 2H, J=6.3), 2.93 (sep, 1H, J=6.9), 2.60 (d, 3H, J=1.2), 1.29 (d, 7H, J=6.9), 1.27 (d, 7H, J=6.9), 1.22 (m, 2H), 0.62 (t, 3H, J=7.2). MS [EI+] 588 (M+H)+.

1. stirringto stir overnight at room temperature
2. customThe layers were separated
3. washthe aqueous washed with ethyl acetate (10 mL)
4. dry with materialdried (MgSO4)
5. filtrationfiltered
6. concentrationconcentrated in vacuo