Metal oxide catalysts have emerged as versatile and sustainable alternatives to traditional homogeneous catalysts in organic transformations [1]. These catalysts, including oxides of titanium, copper, zinc, iron, and cerium, offer unique properties such as tunable surface acidity/basicity, redox activity, and thermal stability, enabling efficient catalytic transformations. Perovskites are a specific type of metal oxide with a unique crystal structure, denoted as ABO₃. This structure allows perovskites to have high versatility in catalytic applications due to their ability to accommodate a variety of metal cations in both A and B positions, creating diverse catalytic properties. The Sonogashira reaction is a widely used method for forming carbon-carbon bonds between terminal alkynes and aryl or vinyl halides. Traditionally, the reaction employs palladium (Pd) as a catalyst and copper (Cu) as a co-catalyst [2]. Perovskites can be used as supports for noble metals in catalytic systems, enhancing the stability, dispersion, and activity of active metal species. In this study, Cu supported on perovskite has been explored as alternative catalyst to promote the Sonogashira reaction under milder conditions and in a more environmentally friendly manner.
