N‐Arylation of Heterocycles with Chloro‐ and Fluoroarenes using Resin‐Supported Sulfonato‐Cu(salen) Complex

Abstract

Sulfonato‐Cu(salen) complex immobilized onto a Merrifield's resin was found to be an efficient catalyst for the N‐arylation of heterocycles with electron‐withdrawing hloro‐ and fluoroarenes. The reactions were carried out in the presence of an inexpensive mild base, K₂CO₃, and N‐arylated compounds were obtained in good to excellent yields. The catalyst was recovered by simple filtration and reused for three cycles with almost consistent activity.

Keywords:

• heterocycles
• Merrifield's resin
• N‐arylation
• reusability
• sulfonato‐Cu(salen) complex

Acknowledgments

We thank the CSIR for financial support under the Task Force Project CMM‐0005. T. Ramani thanks the UGC, and L. C. thanks the CSIR, India, for providing senior research fellowships.