6-Methoxy-2-(4-methoxyphenyl)benzo[b]thiophene → 2-(4-Hydroxyphenyl)benzo(b)thiophen-6-ol

Participants

Reaction Steps

2-(4-Methoxyphenyl)-6-methoxybenzo[b]thiophene (10 g, 35.5 mmol) was suspended in 50 mL of 48% aqueous hydrobromic acid and 100 mL of glacial acetic acid. The reaction was heated to reflux under a nitrogen atmosphere for 120 hours. The reaction was allowed to cool and filtered. The solid product was washed with water and dried to yield 6.46 g of the title compound. 1H NMR: (CDCl3 -d6DMSO):δ 7.54 (d, 1H), 7.48 (d, 2H), 7.27 (s, 1H), 7.24 (m, 1H), 6.92 (d, 1H), 6.85 (d, 2H). MS(FD): m/e=242 (M+).

Provenance & Evidence