4-Fluorophenylboronic acid → HCID 178498913, compound

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6-(4-Fluoro-phenyl)-4-hydroxy-2-oxo-2H-thiochromene-3-carboxylic acid methyl ester was prepared from 6-bromo-4-hydroxy-2-oxo-2H-thiochromene-3-carboxylic acid methyl ester under conditions analogous to Example 7(a) using 4-fluoro-phenylboronic acid. 1H NMR (200 MHz, CDCl3): δ (ppm)=8.515 (s, 1H), 7.765 (d, 1H), 7.586 (m, 2H), 7.427 (d, 1H), 7.381-7.120 (m, 2H), 4.026 (s, 3H).

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