Agarose functionalized phosphorus ligand for stabilization of small-sized palladium and copper nanoparticles: efficient heterogeneous catalyst for Sonogashira reaction

A fluorescence active catalyst support comprising carbon quantum dots and magnesium oxide doping for stabilization of palladium nanoparticles: Application as a recoverable catalyst for Suzuki reaction in water

“…[39][40][41]. These results indicate that 46% of palladium exist in Pd(0) state confirming the reducing ability of MgO-CQD (Fig.…”

Characterization of a Poly‐4‐Vinylpyridine‐Supported CuPd Bimetallic Catalyst for Sonogashira Coupling Reactions

“…[37] The CuPd/PVPy system showed ah ighc atalytic activityi n the Sonogashira reaction of iodobenzene with phenylacetylene carriedo ut with am olar ratio iodide/Pd = 1000 at 95 8Ci na ir atmosphere,r esulting in 100 %c onversion after 2.5 h( specific activity,S A= 520 h À1 ). [38] The catalytic efficiency of CuPd/PVPy was highert han previously reported supported CuPd bimetallic systems, [22][23][24][25][26] taking also into accountt he low doses employed. Moreover,t hanks to the coordinativec apability the PVPy support, the amounts of metals leachedb yt he CuPd/ PVPy system were very low (0.6 ppm of Pd and 3.0ppm of Cu in the crude reaction product) with respect to the ones of an analogoussystem supported on carbon.…”

“…Recently, the presence of Cu in CuPd NPs proved to significantly enhance the catalytic performances of Pd catalysts in carbon–carbon coupling reactions (e.g. Suzuki–Miyaura and Sonogashira reactions) allowing the development of new CuPd catalysts that require also a reduced amount of precious Pd metal …”

“…Suzuki-Miyaura and Sonogashira reactions) allowing the development of new CuPd catalysts that require also areduced amount of precious Pd metal. [18][19][20][21][22][23][24][25][26][27][28][29][30][31] The cross-coupling of as p 2 -carbono fa na ryl or vinyl halide with at erminal sp hybridized carbon from an alkyne, commonly termed as Sonogashira reaction, is one of the most powerful tools to preparei mportant precursors of naturalp roducts, agrochemicals and pharmaceuticals, as well as molecular materials (optical or electronic) . [32][33][34][35][36] Homogeneous palladium salts or organometallic complexes with an excesso fp hosphine ligands togetherw ith copper(I) species are commonly used as catalysts to facilitate the coupling through the transmetallation of alkynes.…”

Solid-Supported Palladium Catalysts in Sonogashira Reactions: Recent Developments

“…Thus, several polysaccharides have been employed for supporting PdNPs, the resulting materials being used as recoverable catalysts in Sonogashira reactions. This is the case of agarose (19) (Figure 7), which has been functionalized with phosphinite groups for the stabilization of palladium/copper bimetallic nanoparticles [43]. The resulting PdCu@Phos.…”