Trimethylsilylacetylene → 1-[(Trimethylsilyl)ethynyl]-3-(trifluoromethyl)benzene

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To a solution of 1-iodo-3-(trifluoromethyl)benzene (1.0 g, 3.6 mmol) in ethyl acetate (20 mL) was added ethynyl(trimethyl)silane (0.540 g, 5.5 mmol), copper iodide (0.042 g, 0.22 mmol), bis(triphenylphosphine) palladium(II) chloride (0.129 g, 0.18 mmol) and TEA (2.2 mL, 14.7 mmol). The reaction mass stirred at 50-60° C. for 24 h. The reaction mass was quenched in water, extracted with ethyl acetate and concentrated to afford 0.500 g of desired product. 1H NMR (300 MHz, DMSO d6): δ 0.26 (s, 9H), 7.44 (t, J=7.8 Hz, 1H), 7.55 (d, J=7.8 Hz, 1H), 7.62 (d, J=7.2 Hz, 1H), 7.72 (s, 1H).

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