Hexane → 3-[1-Benzenesulfonyl-4-(2-butoxy-3,5-diisopropyl-phenyl)-1H-indol-2-yl]-but-2-enoic acid methyl ester

Participants

Reaction Conditions

Reaction Steps

3-(1-Benzenesulfonyl-4-bromo-1H-indol-2-yl)-but-2-enoic acid methyl ester (117 mg, 0.27 mmol) and 2-butoxy-3,5-diisopropylphenyl-boronic acid (150 mg, 54 mmol) (see Example 17, step B) were dissolved in toluene (2 mL) under a nitrogen atmosphere. Tetrakis(triphenylphosphine) palladium (31 mg, 0.027 mmol) and 2N Na2CO3 (0.7 mL) were added and the biphasic mixture stirred at 75° C. for 16 h. The reaction was diluted with water/ethyl acetate. The layers were separated and the aqueous layer was washed with ethyl acetate. The organic portions were passed through a pad of Celite, dried (MgSO4), filtered and concentrated in vacuo to provide 243 mg of a crude black oil. Radial chromatography using (99:1) hexane:ethyl acetate provided 76 mg (48%) of product. 1H NMR (250 MHz, CDCl3): δ 8.15 (d, 1H, 8.2), 7.66 (m, 2H), 7.46-7.27 (m, 5H), 7.11 (d, 1H, J=2.2), 6.90 (d, 1H, J=2.2), 6.54 (s, 1H), 6.05 (d, 1H, J=1.2), 3.80 (s, 3H), 3.36 (sep, 1H, J=6.9), 3.04 (t, 2H, J=6.0), 2.88 (sep, 1H, J=6.9), 2.61 (d, 3H, J=1.2), 1.25 (d, 6H, J=6.9), 1.24 (d, 6H, J=6.9), 1.08-0.87 (m, 4H), 0.62 (t, 3H, J=7.0). MS [EI+] 588 (M+H)+ [EI−] 586 (M−H)+.

Provenance & Evidence