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Catalysis Letters

, Volume 149, Issue 3, pp 778–787 | Cite as

Calcined Dolomite: An Efficient and Recyclable Catalyst for Synthesis of α, β-Unsaturated Carbonyl Compounds

  • Hongyuan Yang
  • Hao Dong
  • Tengfei Zhang
  • Qi Zhang
  • Guangwei Zhang
  • Peng Wang
  • Qing LiuEmail author
Article
  • 63 Downloads

Abstract

Calcined dolomite was utilized as a low-cost and efficient catalyst for the Knoevenagel condensation of aldehydes with active methylene compounds such as malononitrile and ethyl cyanoacetate to afford substituted α, β-unsaturated carbonyl compounds. Calcination temperature was an important variable which changed the surface areas, textural characteristics and basicity of dolomite catalysts. Among them, natural dolomite was converted to CaO–MgO mixed oxide after calcination at 700 °C, which served as the best catalyst for this reaction. It could be reused for four times without significant decrease of the reactivity. The reaction proceeded smoothly under the magnetic stirring condition at room temperature in excellent yields within short time due to the high surface area and reasonable basicity concentration of dolomite-700 °C catalyst. The attractive features of this procedure were the mild and facile reaction conditions, excellent yields, environmentally friendly reaction profiles and high recyclability, which made it to be an efficient and attractive strategy for the preparation of α, β-unsaturated carbonyl compounds.

Graphical Abstract

Keywords

Dolomite Knoevenagel reaction Calcination temperature Basicity Catalysis 

Notes

Acknowledgements

The authors gratefully acknowledge the supports from National Natural Science Foundation of China (No. 21606146), Scientific Research Foundation of Shandong University of Science and Technology for Recruited Talents (No. 2016RCJJ005), and Foundation of State Key Laboratory of High-efficiency Utilization of Coal and Green Chemical Engineering (No. 2018-K29).

Compliance with Ethical Standards

Conflict of interest

The authors declare that they have no conflict of interest.

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Copyright information

© Springer Science+Business Media, LLC, part of Springer Nature 2018

Authors and Affiliations

  • Hongyuan Yang
    • 1
  • Hao Dong
    • 1
  • Tengfei Zhang
    • 1
  • Qi Zhang
    • 1
  • Guangwei Zhang
    • 1
  • Peng Wang
    • 1
  • Qing Liu
    • 1
    Email author
  1. 1.Key Laboratory of Low Carbon Energy and Chemical Engineering, College of Chemical and Environmental EngineeringShandong University of Science and TechnologyQingdaoChina

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