1,2-Dimethoxyethane → 2-(3,3,5,5-Tetramethylcyclohex-1-enyl)phenol

Beteiligte Stoffe

Reaktionsbedingungen

Reaktionsschritte

To a mixture of 2-(4,4,5,5-tetramethyl-[1,3,2]dioxaborolan-2-yl)phenol(3.5 g, 15.9 mmol), trifluoromethanesulfonic acid 3,3,5,5-tetramethylcyclohex-1-enyl ester (5 g, 17.4 mmol) produced in Example (4a) and 1,2-dimethoxyethane (20 mL) were added tetrakis(triphenylphosphine)palladium(0) (0.92 g, 0.79 mmol) and 2N aqueous solution of sodium carbonate (23.9 mL, 47.7 mmol), followed by stirring for 1 hour at an external temperature of 90° C. under a nitrogen atmosphere. Brine was added to the reaction mixture and extraction was performed with ethyl acetate. The organic layer was dried over anhydrous magnesium sulfate and then the solvent was distilled off under reduced pressure and the obtained residue was purified by silica gel column chromatography (ethyl acetate/heptane) to give 3.7 g of the title compound as a yellow oil.

Herkunft & Nachweise