Chem. J. Chinese Universities ›› 2023, Vol. 44 ›› Issue (8): 20230137.doi: 10.7503/cjcu20230137

• Organic Chemistry • Previous Articles     Next Articles

Catalytic Performance of [Fe] for Regioselective Ring-opening of Epoxides

YAO Yixuan1, LU Changbo2, ZHANG Hongwei1, ZHANG Duxin1, SHANG Hongyan1(), TIAN Yuanyu1()   

  1. 1.College of Chemistry and Chemical Engineering,China University of Petroleum(East China),Qingdao 266580,China
    2.Beijing POL Research Institute,Beijing 102300,China
  • Received:2023-03-27 Online:2023-08-10 Published:2023-05-17
  • Contact: SHANG Hongyan, TIAN Yuanyu E-mail:shanghy@upc.edu.cn;tianyy1008@126.com
  • Supported by:
    the National Natural Science Foundation of China(21801250)

Abstract:

In this work, the ring-opening of epoxides was realized using cheap and abundant iron-based catalysts, in which Fe(BF42·6H2O showed the best catalytic effects. The results showed that aldehyde could be obtained with high selectivity in this reaction. The ring-opening of 1,2-epoxyoctane in the presence of 0.01 mmol Fe(BF42·6H2O was applied with 1,4-dioxane as solvent, the yield of octanal was up to 98% with a selectivity of 99%. Gratifyingly, this catalytic system was suitable for a variety of alkyl- and aryl-substituted epoxides. Furthermore, the recycling experiments showed that Fe(BF42·6H2O could maintain excellent catalytic activities when reused for three times, but then deactivated dramatically at the fourth recycle. In order to further understand the reason of catalyst deactivation, Fourier Transform infrared spectoscopy(FTIR), X-ray diffraction(XRD), X-ray fluorescence(XRF) and thermal gravimetric analysis(TGA) were used to analyze the catalyst. It was found that the reason of deactivation was the loss of B and F elements during the reactions, which affected the structure of the catalyst, as well as the coordination ability with epoxides. These findings further proved the mechanism of this reaction and revealed the reason of deactivation, and also provided a theoretical basis for the efficient application of this type of catalysts in homogeneous systems.

Key words: Iron catalyst, Catalytic performance, Deactivation analysis, Epoxide, Aldehyde

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