2-(4-Hydroxyphenyl)-5-benzofurancarboxylic acid → HCID 10192749, compound

Participants

Reaction Steps

Compound 143 (0.21 g, 0.83 mmol) in THF (10 ml) was treated with BH3 THF (4.0 ml of 1.0 M) and the reaction was heated to reflux. After 2 hr, the reaction was cooled and then poured into 2NHCl and extracted with EtOAc. The organic layer was dried, concentrated and the product was purified by cloumn chromatography (60% EtOAc/Hexane) to give 144 as a solid (0.07 g, 37%); Mp=248–250° C.; 1H NMR (DMSO-d6) δ 9.86 (br s, 1 H), 7.72 (d, 2 H, J=8.3 Hz), 7.52–7.49 (m, 2 H), 7.19 (dd, 1 H, J=8.3 Hz, 1.6 Hz), 7.15 (s, 1 H), 6.87 (d, 2 H, J=8.8 Hz), 5.19 (t, 1 H, J=5.2 Hz), 4.56 (d, 2 H, J=4.1 Hz); MS 239 (M−H)−.

Provenance & Evidence