Tetrabutylammonium Fluoride → 2,6,7-Trioxabicyclo(2.2.2)octane, 4-ethyl-1-(4-ethynylphenyl)-

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Reaction Steps

Tetrabutyl ammonium fluoride solution (3.3 ml,1M in tetrahydroforan) was added to a stirred solution of 4-ethyl-1-[4-(2-trimethylsilylethynyl)phenyl]-2,6,7-trioxabicyclo[2,2,2]octane (0.87 gms) in tetrahydrofuran (15 ml). The mixture was stirred for 30 minutes at room temperature when the solvent was removed under vacuum. The residue was taken up in ether and washed with water and brine. The ethereal solution was dried over anhydrous magnesium sulphate and evaporated in vacuo. Recrystallisation from hexane gave 4-ethyl-1-(4-ethynylphenyl)-2,6,7-trioxabicyclo[2,2,2]octane as an off-white solid (0.66 gms).

Provenance & Evidence