Phenylboronic Acid → HCID 178498919, compound

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Reaction Steps

4-Hydroxy-2-oxo-7-phenyl-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 phenylboronic acid under conditions analogous to Example 7(a). 1H NMR (200 MHz, CDCl3): δ (ppm)=15.26 (s, 1H), 8.40 (d, J=9.1 Hz, 1H), 7.65-7.45 (m, 7H), 4.02 (s, 3H).

Provenance & Evidence