Dimethylformamide → (4-Bromophenylethynyl)trimethylsilane

Participants

Reaction Steps

A mixture of 150 g of 97% bromo iodo benzene, 500 ml of anhydrous dimethylformamide, 100 ml of triethylamine, 50 g of trimethylsilyl acetylene, 2.1 g of copper iodide and 2.22 g of bis-(triphenylphosphine)-palladium (II) dichloride was stirred for 2 hours and then 500 ml of ice-cooled water were added. The mixture was extracted 3 times with 500 ml of ethyl acetate and the organic phase was washed with salt water, then dried over sodium sulfate, and evaporated under reduced pressure to obtain 136.542 g of a brown oil which was purified by distillation under reduced pressure to obtain 106.979 g of the expected product with a boiling point of 75°-82° C. under 0.2 mbar and a melting point of 62° C.

Provenance & Evidence