Abstract
The Pd phosphine complex catalysts immobilized onto polyethylene glycol (PEG)-modified silica were prepared in order to clarify the effect of the PEG modification on the Suzuki–Miyaura coupling reaction in organic solvents. For the reaction of ethyl p-bromobenzoate and phenylboronic acid in the presence of potassium carbonate in toluene, the PEG-modified silica-immobilized Pd catalysts exhibited much higher activities than the catalysts without PEG modification.
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Acknowledgments
This research was financially supported by the Project of “Development of Microspace and Nanospace Reaction Environment Technology for Functional Materials” of New Energy and Industrial Technology Development Organization (NEDO), Japan. The authors thank Ms. Michiyo Yoshinaga for assistance with catalytic tests.
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Onozawa, Sy., Fukaya, N., Saitou, K. et al. PEG Modification Effect of Silica on the Suzuki–Miyaura Coupling Reaction Using Silica-immobilized Palladium Catalysts. Catal Lett 141, 866–871 (2011). https://doi.org/10.1007/s10562-011-0583-5
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DOI: https://doi.org/10.1007/s10562-011-0583-5