2-(2,3-Difluorophenyl)-6-hydroxychroman-4-one → 2-(2,3-Difluorophenyl)chroman-4,6-diol

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Reaction Steps

2-(2,3-Difluorophenyl)chroman-4,6-diol was prepared as described for 2-phenylchroman-4,6-diol in Example 8(a) starting from 2.91 g of 2-(2,3-difluorophenyl)-6-hydroxychroman-4-one. 1H NMR (400 MHz, d6-DMSO) δ: 8.88 (s, 1H), 7.45-7.36 (m, 2H), 7.28 (m, 1H), 6.89 (d, 1H, J 2.8 Hz), 6.61 (d, 1H, J 8.7 Hz), 6.55 (dd, 1H, J 8.7, 2.8 Hz), 5.49 (bs, 1H), 5.40 (dd, 1H, J 11.8, 1.4 Hz), 4.90 (m, 1H), 2.28 (m, 1H), 1.99 (m, 1H).

Provenance & Evidence