[CH:1]([C:3]1[CH:4]=[C:5](B(O)O)[CH:6]=[CH:7][C:8]=1[O:9][CH3:10])=[O:2].Br[C:15]1[N:16]=[CH:17][S:18][CH:19]=1.C(=O)([O-])[O-].[Na+].[Na+]>C1C=CC([P]([Pd]([P](C2C=CC=CC=2)(C2C=CC=CC=2)C2C=CC=CC=2)([P](C2C=CC=CC=2)(C2C=CC=CC=2)C2C=CC=CC=2)[P](C2C=CC=CC=2)(C2C=CC=CC=2)C2C=CC=CC=2)(C2C=CC=CC=2)C2C=CC=CC=2)=CC=1.O.C(OCC)(=O)C.COCCOC>[CH3:10][O:9][C:8]1[CH:7]=[CH:6][C:5]([C:15]2[N:16]=[CH:17][S:18][CH:19]=2)=[CH:4][C:3]=1[CH:1]=[O:2](3-Formyl-4-methoxyphenyl)boronic acid (309 mg, 1.71 mmol), 4-bromothiazole (250 mg, 1.52 mmol, prepared as described by J. Trybulski and H. J. Brabander, U.S. Pat. No. 4,990,520, 1991), and tetrakis(triphenylphosphine)palladium(0) (88 mg, 0.076 mmol) were added to a mixture of water (3.5 mL), ethylene glycol dimethyl ether (3.5 mL), and sodium carbonate (805 mg, 7.6 mmol). The mixture was heated in an oil bath at 80° C. for 3 h, allowed to cool to 25° C., and partioned between ethyl acetate (40 mL) and water (20 mL). The aqueous layer was extracted with 2×40 mL of dichioromethane and the combined organic layers dried (sodium sulfate), decanted, and evaporated. The residue was purified by flash column chromatography on silica gel, eluting with 10% ethyl acetate in hexane to give 182 mg (55% yield) of the title compound as a white solid. NMR (400 MHz, CDCl3): δ 10.51 (s, 1H), 8.88 (d, 1H, J=2 Hz), 8.32 (d, 1H, J=2 Hz), 8.24 (dd, 1H, J=9,2 Hz), 7.54 (d, 1H, J=2 Hz), 7.09 (d, 1H, J=9 Hz), 3.99 (s, 3H). Mass spectrum (NH3 /CI): 220 (M+1).
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