2-Chlorophenylboronic acid → HCID 178498910, compound

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6-(2-Chloro-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 2-chloro-phenylboronic acid. 1H NMR (200 MHz, CDCl3): δ (ppm)=8.412 (s, 1H), 7.697 (d, 1H), 7.490-7.305 (m, 5H), 4.018 (s, 3H).

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