Trifluoroacetic acid → HCID 15550520, compound

Participants

Reaction Steps

Trifluoroacetic acid (30 mL) was added dropwise to a rt, stirred suspension of benzo [b]thiophen-2-yl-(2,3-dimethyl-furan-5-yl)-methanol (9.56 g, 40.0 mmol) and sodium borohydride (7.0 g, 200 mL) in carbon disulfide (100 mL) under a try N2 atmosphere over a period of 30 min. After an additional 3 hours , the reaction mixture was carefully quenched and further diluted with aqueous ammonium chloride (250 mL). Aqueous mixture was extracted with ethyl ether (500 mL). The ethyl ether extract was washed with water and brine. Silica gel (100 mL) was added. Solvents were removed and the silica adsorbate was flash chromatographed (eluent 99:1 petroleum ether:ethyl acetate) to provide the title compound as an oil (3.75 g, 42%): NMR (CDC13); δ 7.74 (d, J=8 Hz, 1H), 7.67 (d, J=8, Hz, 1H), 7.35-7.22 (m, 2H), 7.08 (d, J=1 Hz, 1H), 5.93 (s, 1H), 4.15 (s, 2H), 2.17 (s, 3H), 1.90 (s, 3H); MS (EI): [M+], 242.

Provenance & Evidence