“…Preparation of 1,2-Bis(2,2 0 -bithiophene-5-yl)acetylene (bbta) (4) Cascade of three reactors, each containing a mixture of substrates consisting of 5-iodo-2,2 0 -bithiophene (15.0 g, 51.3 mmol), CuI (1.125 g, 5.9 mmol), [PdCl 2 (PPh 3 ) 2 ] (0.75 g, 1.1 mmol), acetone (500 mL), triethylamine (11.25 mL, 81 mmol) was flushed with a steady stream of acetylene (1 mol/6 h) mixed with argon (1:5 v/v) at room temperature for 6 h. After purging with acetylene was finished, the content of the reactors was left to stir for 24 h at room temperature. Then the volatile fractions from the combined mixtures were evaporated on a rotary evaporator.…”