Potassium Fluoride → 4,3'-Bis(diethoxyphosphoryl)-[2,2']-bithiophene

Participants

Reaction Steps

At room temperature, 1.4875 g (4.3 mmols) of 5-iodo-3-(diethoxyphosphoryl)thiophene and 0.0994 g (0.086 mmols) of commercially available tetrakistriphenylphosphine palladium were dissolved in 43 ml of toluene, to which 2.1899 g (4.3 mmols) of 2-tributylstannyl-3-(diethoxyphosphoryl)thiophene and 0.0347 g (0.39 mmols) of commercially available copper(I) chloride were added at room temperature. Thereafter, the reaction mixture was heated and stirred under reflux for 3.5 hours. After the reaction, the reaction mixture was cooled down to room temperature, to which a potassium fluoride aqueous solution was added, followed by stirring for 1 hour. Thereafter, the solid was removed by celite filtration and the filtrate was extracted with ethyl acetate. The resulting organic phase was washed with a saturated saline solution and dried over anhydrous sodium sulfate. The solvent was removed by distilling off under reduced pressure, and the resulting crude product was purified with a silica gel column (gradiated with acetone from ethyl acetate) to obtain the specified substance in the form of a yellow oil at a yield of 1.5836 g (yield: 84%).

Provenance & Evidence