3,5-Bis-trifluoromethylphenylboronic acid → HCID 178498914, compound

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6-(3,5-Bis-trifluoromethyl-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 (Example 27 e) under conditions analogous to Example 7(a) using 3,5-Bis-trifluoromethyl-phenylboronic acid. 1H NMR (200 MHz, CDCl3): δ (ppm)=8.572 (s, 1H), 8.037 (s, 2H), 7.908 (s, 1H), 7.820 (d, 1H), 7.510 (d, 1H), 4.04 (s, 3H).

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