Triethylamine → HCID 18373051, compound

Participants

Reaction Steps

To a solution of 5-bromobenzothiophene (50.0 g), 1-decyne (35.7 g), triethylamine (71.2 g) and dry tetrahydrofuran (150 ml), under nitrogen, was added bis(triphenylphosphine)palladium (11) chloride (1.65 g) followed by copper (1) iodide (0.233 g) with stirring, at room temperature. The reaction mixture was covered with foil and stirred at reflux, under nitrogen, over the weekend. Additional bis-triphenylphosphine)palladium (II) chloride (0.5%) and 0.25% copper (I) iodide were added, and the reaction mixture was stirred at reflux for three days, cooled, filtered through a bed of celite and the filter cake was washed with ether. The residue was flash chromatographed (silica, 1% ethyl acetate-heptane). The appropriate fractions were collected and evaporated to give 56.3 g (89%) of product.

Provenance & Evidence