2-Acetylhydroquinone → 2-(4-Fluorophenyl)-6-hydroxychroman-4-one

Participants

Reaction Steps

6-Hydroxy-2-(4-fluorophenyl)chroman-4-one was prepared as described for 2-(3-fluorophenyl)-6-hydroxychroman-4-one in Example 9(a) starting from 2.0 g of 2′,5′-dihydroxyacetophenone and 1.6 ml of 4-fluorobenzaldehyde. The product was recrystallised from acetic acid. 1H NMR (400 MHz, d6-DMSO) δ: 7.59 (m, 2H), 7.27 (m, 2H), 7.14 (d, 1H, J 3.1 Hz), 7.05 (dd, 1H, J 8.9, 3.1 Hz), 6.96 (d, 1H, J 8.9 Hz), 5.56 (dd, 1H, J 13.2, 2.8 Hz), 3.18 (dd, 1H, J-16.9, 13.2 Hz), 2.77 (dd, 1H, J −16.9, 2.8 Hz).

Provenance & Evidence