To toluene-4-sulfonic acid 3-[3-iodo-1-(toluene-4-sulfonyl)-1H-pyrrolo[2,3-b]pyridine-5-yl]-phenyl ester (50 mg, 0.077 mmol, prepared method 6), furan-3-boronic acid (11 mg, 0.1 mmol) and dichlorobis (triphenylphosphino)palladium (ii) (3 mg, 0.0046 mmol) in a Smith process vial was added 0.6 mL of a 1:1 mixture of acetonitrile, and a 2 M solution of sodium carbonate in water. The reaction was run in a Personal Chemistry® microwave reactor at 165° C. for 1200 s. The mixture was diluted with DMF (ca. 5 mL) and filtered with a syringe filter (0.45 micron). The filtrate was concentrated in vacuo and redissolved in DMSO. Purification by reverse phase chromatography using a gradient of H2O and acetonitrile (with 0.1% formic acid as a modifier) afforded 3-(3-furan-3-yl-1H-pyrrolo[2,3-b]pyridine-5-yl)-phenol as an off-white solid (6 mg, 56% yield). 1H NMR (500 MHz, DMSO-d6) δ 6.70 (dd, J=2.5, 8.0 Hz, 1H), 6.92 (d, J=2.0 Hz, 1H), 7.07 (t, J=2.0 Hz, 1H), 7.13 (d, J=8.0 Hz, 1H), 7.21 (t, J=8.0 Hz, 1H), 7.67 (t, J=1.5 Hz, 1H), 7.77 (d, J=2.5 Hz, 1H), 8.25 (d, J=2.0 Hz, 1H), 8.27 (s, 1H), 8.41 (d, J=2.0 Hz, 1H), 9.5 (broad s, 1H), 11.8 (s, 1H). MS: m/z 277 (M+H+).
