Hydrochloric Acid → 3,3',5,5'-Tetramethyl-7,7'-bis(3,5-diethynylphenyl)-1,1'-biadamantane

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Reaction Steps

Next, 39.8 g (53.5 mmol) of the previously obtained 3,3′,5,5′-tetramethyl-7,7′-bis[3,5-bis(trimethylsilylethynyl)phenyl]-1,1′-biadamantane and 1.46 g (10.6 mmol) of potassium carbonate were stirred in a mixed solvent comprising 600 ml of tetrahydrofuran and 300 ml of methanol, for 4 hours under a nitrogen atmosphere at room temperature. This was added to 1000 ml of a 10% hydrochloric acid aqueous solution, and the precipitate was filtered and washed with 1000 ml of water and then with 1000 ml of acetone, after which it was dried to obtain 21.2 g of 3,3′,5,5′-tetramethyl-7,7′-bis(3,5-diethynylphenyl)-1,1′-biadamantane.

Provenance & Evidence