4-Fluorophenylboronic acid → HCID 178498926, compound

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7-(4-Fluoro-phenyl)-4-hydroxy-2-oxo-2H-thiochromene-3-carboxylic acid methyl ester was prepared from 7-bromo-4-hydroxy-2-oxo-2H-thiochromene-3-carboxylic acid methyl ester (Example 5 e) and 4-fluorophenylboronic acid under conditions analogous to Example 7(a). 1H NMR (200 MHz, CDCl3): δ (ppm)=15.27 (s, 1H), 8.39 (d, J=8.5 Hz, 1H), 7.60-7.50 (m, 4H), 7.21-7.17 (m, 2H), 4.02 (s, 3H).

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