A bimetallic Pd/Cu catalyst supported on a metal-organic-framework-derived cobalt
oxide was prepared and characterized by SEM, EDS, XRD, XPS, and ICP-OES analyses.
The catalyst promoted the Sonogashira reaction of aryl iodides with terminal alkynes
at a low loading of the palladium (0.032 mol%) and copper species (0.012 mol%) to
give the corresponding disubstituted alkynes in moderate to good yields. When the
catalyst was recovered by using an external magnetic field, its catalytic activity
decreased slightly in a second cycle.
Key words
Sonogashira reaction - palladium catalysis - copper catalysis - bimetal catalysis
- alkynes - heterogeneous catalysis