Selective C–C coupling of terminal alkynes under an air atmosphere without base over Cu–NX–C catalysts

摘要: The fabrication of a silk fibroin-drived porous, in situ nitrogenated carbon skeleton with highly dispersed Cu–NX–C active sites via sol–gel and pyrolysis treatment was demonstrated. used to catalyze the oxidative homo-coupling terminal alkynes excellent functional group tolerance high yields under an air atmosphere without base additives. small amount catalyst (2 mol%) suitable recyclability further demonstrated its good activity stability. can be ascribed surface area, porous structure, size graphitic N. A possible mechanism deduced according structural valence analyses sample before after reaction. report aims demonstrate that such nature-based sustainable provide new insights into design coupling reaction catalysts outstanding catalytic C–C performance.