Journal
TRANSITION METAL CHEMISTRY
Volume 35, Issue 3, Pages 305-313Publisher
SPRINGER
DOI: 10.1007/s11243-010-9328-3
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Funding
- Department of Science and Technology (DST)
- Council of Scientific and Industrial Research (CSIR)
- University Grant Commission (UGC), New Delhi, India
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A polymer-anchored Pd(II) Schiff base complex has been synthesized by reacting a polymeric amine with 2-pyridinecarboxaldehyde to get the polymer-anchored Schiff base, which was then reacted with palladium acetate. The catalyst was characterized by physicochemical and spectroscopic methods. It shows excellent catalytic activity in the Sonogashira coupling of phenylacetylene with aryl halides using triethylamine as a base and copper iodide as a co-catalyst in water under open air at 70 A degrees C. We have also studied the effects of base and solvent on the coupling reaction. Sonogashira reactions of phenylacetylene with a variety of functionalized aryl halides were performed under the optimized reaction conditions. This catalyst gives excellent yields without the use of phosphine ligands. Further experiments showed that the catalyst can be used five times without much loss in the catalytic activity.
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