1.4- Diiodotetraphenyl-l ,3-butadiene

Tetraphenyltellurophene A solution of 1,4-diiodotetraphenyl-l,3-butadiene (2.0 g, 3.3 mmol), finely powdered lithium telluride (1.5 g, 11 mmol), in 125 mL of 2-ethoxyethyl ether is heated at reflux, under stirring and flushing with N2, for 8 h. The mixture is then poured in 1000 mL of water, the organic phase is separated and submitted to usual workup. After evaporation, the residue is recrystallized from dicloromethane/ethanol, giving the product 1.3 g (82%), m.p. 239°C. 

---