反应详情

6-(4-Benzyloxy-phenyl)-4-hydroxy-2-oxo-2H-chromene-3-carboxylic acid methyl ester was prepared from 6-bromo-4-hydroxy-2-oxo-2H-chromene-3-carboxylic acid methyl ester (example 2-b) and 4-benzyloxyphenylboronic acid under conditions analogous to example 3-a. 1H NMR (200 MHz, CDCl3): δ (ppm)=8.14 (d, J=2.3 Hz, 1H), 7.85 (dd, J=8.5, 2.3 Hz, 1H), 7.54-7.08 (m, 10H), 5.12 (s, 2H), 4.04 (s, 3H).