| 초록 |
The Sonogashira reaction has gained much attention as a process for synthesizing advanced functional materials such as conducting polymers. We introduce a process of decarboxylative coupling through a one-pot synthesis of diarylalkynes using propiolic acid and aryl halides and a copper-free palladium catalyst. By screening various aryl halides, propiolic acids, and reaction conditions, we found that the decarboxylative coupling reaction is dominant at the elevated temperature, while carboxylic acid-protected arylalkynes can be obtained at room temperature. This reaction is particularly clean, because the by-product is CO2 and metal by products have been eliminated. This method offers a new strategy to construct conjugated oligomers and polymers that is economical and environmentally friendly. |
