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Investigation of Sol–Gel Supported Palladium Catalysts for Heck Coupling Reactions in o/w-Microemulsions | The Nairoukh Research Group

Investigation of Sol–Gel Supported Palladium Catalysts for Heck Coupling Reactions in o/w-Microemulsions

Citation:

Volovych, I. ; Kasaka, Y. ; Schwarze, M. ; Nairoukh, Z. ; Blum, J. ; Fanun, M. ; Avnir, D. ; Schomäcker, R. . Investigation Of Sol&Ndash;Gel Supported Palladium Catalysts For Heck Coupling Reactions In O/W-Microemulsions. J. Mol. Catal. A Chem. 2014, 393, 210 – 221 2014.

Date Published:

2014

Abstract:

Sol–gel supported palladium catalysts are investigated for the Heck coupling reaction between styrene and iodo-/bromobenzene to trans-stilbenes in o/w-microemulsions as alternative reaction medium. High conversions and selectivities are obtained with these catalysts and they show better catalytic performance than their commercial analogs Pd@SiO2 or Pd/C. The influence of the catalyst structure on the activity is investigated in detail showing mass transport limitations that can be optimized by the palladium loading. The catalyst is recyclable >6 times with negligible palladium leaching into the solution. Because of the good recyclability under retention of activity and selectivity, the influence of transport limitations is suppressed and the total catalyst efficiency is increased to more than 2.

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Last updated on 05/19/2021