Sodium Carbonate → 2-(1-(3-chloro-phenyl)-3-methyl-but-1-enyl)-1-(phenylsulfonyl)-1H-pyrrolo[2,3-b]pyridine

Participants

Reaction Steps

A suspension of toluene-4-sulfonic acid-1-(1-benzenesulfonyl-1H-pyrrolo[2,3-b]pyridin-2-yl)-3-methyl-but-1-enyl ester (prepared as in Example 130, 3.0 g, 6.0 mmol), 3-chloro-phenylboronic acid (2.35 g, 15 mmol), bis(triphenylphosphine)palladium(II) dichloride (0.42 g, 0.6 mmol) in dioxane (30 mL) and an aqueous sodium carbonate solution (2N, 15 mL) was heated in a microwave at 100° C. for 2 h. The reaction mixture was diluted with ethyl acetate (100 mL) and washed with a saturated sodium bicarbonate solution (2×50 mL). The organics were dried over anhydrous sodium sulfate, filtered and concentrated in vacuo. Silica gel column chromatography (30 g, 5% ethyl acetate/petroleum ether) afforded 2-(1-(3-chloro-phenyl)-3-methyl-but-1-enyl)-1-(phenylsulfonyl)-1H-pyrrolo[2,3-b]pyridine (2.5 g, 95.4%) as an off-white solid: 1H NMR (300 MHz, CDCl3) δ ppm 8.51 (dd, 1H, J1=4.8 Hz, J2=1.8 Hz), 7.89 (dd, 1H, J1=7.8 Hz, J2=1.8 Hz), 7.68 (dd, 2H, J1=8.7 Hz, J2=1.5 Hz), 7.44 (m, 1H), 7.28-7.06 (m, 5H), 6.53 (s, 1H), 6.13 (d, 1H, J=10.2 Hz), 2.65 (m, 1H), 1.15-1.08 (m, 6H).

Provenance & Evidence