Reaktion #59485

Reaktionsgleichung

2-(3-fluorophenyl)-6-hydroxychroman-4-one

2′,5′-dihydroxyacetophenone

2-fluorobenzaldehyde

→

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

Reaktionsbedingungen

Aufarbeitung

1. 1
   SonstigeThe product was recrystallised from acetic acid

Vorschrift

2-(2-Fluorophenyl)-6-hydroxychroman-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 1.4 ml of 2-fluorobenzaldehyde. The product was recrystallised from acetic acid. 1H NMR (400 MHz, d6-DMSO) δ: 9.45 (s, 1H), 7.67 (m, 1H), 7.47 (m, 1H), 7.32-7.25 (m, 2H), 7.14 (d, 1H, J 3.0 Hz), 7.04 (dd, 1H, J 8.9, 3.0 Hz), 6.95 (d, 1H, J 8.9 Hz), 5.77 (dd, 1H, J 13.5, 2.8 Hz), 3.26 (dd, 1H, J −16.9, 13.5 Hz), 2.76 (dd, 1H, J −16.9, 2.8 Hz).

Quelle