Tetrabutylammonium Fluoride → HCID 57421960, compound

Participants

Reaction Steps

To a stirred solution of 2-t-butyldimethylsilyl-3-(3,4,5-trimethoxy-benzoyl)-6-methoxy-7-isopropoxy-benzofuran (0.066 mmol) in tetrahydrofuran (1 mL) was added tetrabutylammoniumfluoride (76.5 μl, 0.076 mmol, 1M solution in tetrahydrofuran). The reaction mixture was stirred at room temperature for 20 minutes (monitored by tlc), diluted with ethyl acetate (10 mL) and washed with 1M hydrochloric acid (5 mL). The organic layer was dried over magnesium sulfate and the solvent was removed under vacuum. The crude product was purified by flash chromatography (silica gel, eluent=hexane/diethyl ether; 7:3) to afford the title compound as a light yellow paste (23 mg) that was used directly in the next step; 1H NMR (300 MHz, CDCl3) δ 8.00 (s, 1H, C2H), 7.78 (d, 1H, J=8.60 Hz), 7.15 (s, 2H, benzoyl Hs), 7.04 (d, 1H, J=8.61 Hz), 4.73 (m, 1H), 3.93 (s, 3H, OMe), 3.92 (s, 3H, OMe), 3.90 (s, 6H, 2×OMe), 1.37 (d, 6H, J=6.14 Hz).

Provenance & Evidence