Trimethylsilylacetylene → {[4-(Difluoromethoxy)phenyl]ethynyl}(trimethyl)silane

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反応手順

A solution of 1-(difluoromethoxy)-4-iodobenzene (12.7 g, 50 mmol) in triethylamine is treated with tetrakis(triphenylphosphine)palladium (4.0 g, 3.5 mmol), copper iodide (925 mg, 4.85 mmol), and a solution of ethynyl(trimethyl)silane (6.9 mL, 50 mmol) in acetonitrile at room temperature, stirred for 1 h at 60° C. and concentrated in vacuo. The resultant residue was dissolved in Et2O and filtered. The filtrate was concentrated and the concentrate was purified by chromatography (silica gel, EtOAc/hexane: 5/95) to give {[4-(difluoromethoxy)phenyl]ethynyl}(trimethyl)silane (11.5 g, 96%) as an oil.

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