Abstract
The catalytic activity of [Pd{C6H4(CH2N(CH2Ph)2)} (µ-Br)]2 complex as an efficient, stable and non-sensitive to air and moisture catalyst was investigated in the Sonogashira cross-coupling reaction under microwave irradiation. In the presence of catalytic amount of this homogeneous catalytic system, various aryl halides were efficiently coupled with phenylacetylene under copper-free conditions. The substituted internal alkynes were produced in excellent yields in short reaction times in NMP at 100 °C. The combination of dimeric complex as homogenous catalyst and microwave irradiation and also NMP as microwave-active polar solvent gave higher yields in shorter reaction times.
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Acknowledgments
We gratefully acknowledge the funding support received for this project from the Isfahan University of Technology (IUT), IR Iran and Isfahan Science & Technology Town (ISTT), IR, Iran. We also gratefully acknowledge the partial financial support received from the research council of Alzahra University.
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Hajipour, A.R., Rafiee, F. Microwave-assisted Sonogashira cross-coupling reaction catalyzed by CN-ortho-palladated complex of tribenzylamine under copper-free conditions. J IRAN CHEM SOC 12, 1163–1169 (2015). https://doi.org/10.1007/s13738-014-0577-5
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DOI: https://doi.org/10.1007/s13738-014-0577-5