Sodium Carbonate → 2-(1-(3-methoxy-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, 6.04 mmol), 3-methoxy-phenylboronic acid (2.3 g, 15.1 mmol), bis(triphenylphosphine)palladium(II) dichloride (425 mg, 0.6 mmol) in 1,4-dioxane (30 mL) and an aqueous sodium carbonate solution (2N, 15.4 mL) was heated in a microwave at 100° C. for 2 h. The reaction mixture was diluted with ethyl acetate (20 mL) and washed with a saturated aqueous sodium bicarbonate solution (2×40 mL). The organics were dried over anhydrous sodium sulfate, filtered and concentrated in vacuo. Silica gel column chromatography (30 g, petroleum ether/ethyl acetate 10:1) afforded 2-(1-(3-methoxy-phenyl)-3-methyl-but-1-enyl)-1-(phenylsulfonyl)-1H-pyrrolo[2,3-b]pyridine (2.3 g, 90%) as a white solid: 1H NMR (300 MHz, CDCl3) δ ppm 8.50 (d, 1H, J=4.8 Hz), 7.90 (d, 1H, J=4.8 Hz), 7.67 (d, 2H, J=7.5 Hz), 7.42 (t, 1H, J=7.5 Hz), 7.27-7.18 (m, 3H), 6.82 ((t, 2H, J=9.0 Hz), 6.65 (s, 1H), 6.55-6.46 (m, 2H), 6.18-6.15 (d, 1H, J=10.2 Hz), 3.67 (s, 3H), 2.69-2.66 (m, 1H), 1.15 (s, 3H), 1.13 (s, 3H).

Provenance & Evidence