Tetrabutylammonium Fluoride → Methyl 2-((S)-6-((R)-7-fluoro-4-(4-hydroxy-2,6-dimethylphenyl)-2,3-dihydro-1H-inden-1-yloxy)-2,3-dihydrobenzofuran-3-yl)acetate

Beteiligte Stoffe

Reaktionsschritte

To a solution of methyl 2-((S)-6-((R)-4-(4-(tert-butyldimethylsilyloxy)-2,6-dimethylphenyl)-7-fluoro-2,3-dihydro-1H-inden-1-yloxy)-2,3-dihydrobenzofuran-3-yl)acetate (440 mg) in tetrahydrofuran (5 mL) is added at 0° C. tetrabutylammonium fluoride (3.1 mL of a 1 M solution in tetrahydrofuran). The mixture is stirred for 2 hours at room temperature, diluted with diethylether and washed with water and brine. After drying (MgSO4) the solvents are evaporated and the residue is chromatographed on silica gel (cyclohexane/ethyl acetate 90:10→60:40) to give the title compound. Yield: 280 mg; LC (method 4): tR=1.79 min; Mass spectrum (ESI+): m/z=485 [M+Na].

Herkunft & Nachweise