Trimethylsilylacetylene → Methyl 2-chloro-5-((trimethylsilyl)ethynyl)benzoate

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Reaction Steps

A mixture of 2-chloro-5-iodo-benzoic acid methyl ester (3.5 g, 12 mmol), dichlorobis(triphenylphosphino)palladium(II) (0.04 g, 0.06 mmol), triphenylphosphine (0.06 g, 0.24 mmol), copper iodide (0.05 g, 0.24 mmol), (trimethylsilyl)acetylene (1.9 g, 19.2 mmol) in triethylamine (40 mL) was heated at reflux for 12 h. The mixture was concentrated in vacuo, diluted with ethyl acetate (150 mL) and washed sequentially with 10% aqueous citric acid, water, and brine. The organic solution was dried, filtered and concentrated in vacuo to afford the title compound (3.14 g).

Provenance & Evidence