Chinese Journal of Applied Chemistry ›› 2010, Vol. 27 ›› Issue (07): 787-791.DOI: 10.3724/SP.J.1095.2010.90577

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Synthesis of Lignin-tetraethylenepentamine Palladium Complex and Its Catalytic Properties for Suzuki Reaction

XUE Man1,2, ZHANG Shi-Zhen3, WU Yu-Feng1, LIU Jian1, CUI Yuan-Chen1*   

  1. (1.Key Laboratory for Special Functional Materials,Henan University,Kaifeng 475004;
    2.Kaifeng Institute of Education,Kaifeng;
    3.Shangqiu Technician School,Shangqiu)
  • Received:2009-08-31 Revised:2009-11-10 Published:2010-07-10 Online:2010-07-10

Abstract:

Lignintetraethylenepentamine was synthesized from Lignin and tetraethylenepentamine(TEPA) with formaldehyde as a crosslinking agent by Mannich reaction. The prepared complex was used as a matrix to support palladium chloride. Lignin-TEPA-Pd complex was characterized by XPS, TG and DTA, which was an efficient catalyst for the Suzuki reaction of iodobenzene with sodium tetraphenylboron. The yield of the product was up to 90.2% when the reaction was carried out at 80 ℃ in air for 8 h with V(DMF)∶V(H2O)=2∶1 mixture as the solvent and NaHCO3 as the base. The catalyst could be separated easily, but the yield of product decreased to 31.3% after 4 times reusage.

Key words: lignin, palladium, supported catalyst, Suzuki reaction

CLC Number: