SCI和EI收录∣中国化工学会会刊

Chinese Journal of Chemical Engineering ›› 2024, Vol. 71 ›› Issue (7): 132-139.DOI: 10.1016/j.cjche.2024.03.026

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Study on trifluoromethanesulfonic acid-promoted synthesis of daidzein: Process optimization and reaction mechanism

Hai Cao1, Haibin Yang1,2, Yanxiong Fang1,2, Yuandi Zeng1, Xiaolan Cai1,2, Jingjing Ma1   

  1. 1. School of Chemical Engineering and Light Industry, Guangdong University of Technology, Guangzhou 510006, China;
    2. Jieyang Branch of Chemistry and Chemical Engineering Guangdong Laboratory (Rongjiang Laboratory), Jieyang 515200, China
  • Received:2024-01-08 Revised:2024-03-26 Online:2024-08-30 Published:2024-07-28
  • Contact: Haibin Yang,E-mail:haibiny@gdut.edu.cn;Yanxiong Fang,E-mail:fangyx@gdut.edu.cn
  • Supported by:
    We are grateful for the Science and Technology Planning Project of Guangdong Province (2016B090934002) and Guangdong Provincial Natural Science Foundation (2023A1515011640) for financial support.

Study on trifluoromethanesulfonic acid-promoted synthesis of daidzein: Process optimization and reaction mechanism

Hai Cao1, Haibin Yang1,2, Yanxiong Fang1,2, Yuandi Zeng1, Xiaolan Cai1,2, Jingjing Ma1   

  1. 1. School of Chemical Engineering and Light Industry, Guangdong University of Technology, Guangzhou 510006, China;
    2. Jieyang Branch of Chemistry and Chemical Engineering Guangdong Laboratory (Rongjiang Laboratory), Jieyang 515200, China
  • 通讯作者: Haibin Yang,E-mail:haibiny@gdut.edu.cn;Yanxiong Fang,E-mail:fangyx@gdut.edu.cn
  • 基金资助:
    We are grateful for the Science and Technology Planning Project of Guangdong Province (2016B090934002) and Guangdong Provincial Natural Science Foundation (2023A1515011640) for financial support.

Abstract: Daidzein has been widely used in pharmaceuticals, nutraceuticals, cosmetics, feed additives, etc. Its preparation process and related reaction mechanism need to be further investigated. A cost-effective process for synthesizing daidzein was developed in this work. In this article, a two-step synthesis of daidzein (Friedel–Crafts acylation and [5+1] cyclization) was developed via the employment of trifluoromethanesulfonic acid (TfOH) as an effective promoting reagent. The effect of reaction conditions such as solvent, the amount of TfOH, reaction temperature, and reactant ratio on the conversion rate and the yield of the reaction, respectively, was systematically investigated, and daidzein was obtained in 74.0% isolated yield under optimal conditions. Due to the facilitating effect of TfOH, the Friedel–Crafts acylation was completed within 10 min at 90 °C and the [5+1] cyclization was completed within 180 min at 25 °C. In addition, a possible reaction mechanism for this process was proposed. The results of the study may provide useful guidance for industrial production of daidzein on a large scale.

Key words: Synthesis, Optimal design, Chemical processes, Reaction mechanism

摘要: Daidzein has been widely used in pharmaceuticals, nutraceuticals, cosmetics, feed additives, etc. Its preparation process and related reaction mechanism need to be further investigated. A cost-effective process for synthesizing daidzein was developed in this work. In this article, a two-step synthesis of daidzein (Friedel–Crafts acylation and [5+1] cyclization) was developed via the employment of trifluoromethanesulfonic acid (TfOH) as an effective promoting reagent. The effect of reaction conditions such as solvent, the amount of TfOH, reaction temperature, and reactant ratio on the conversion rate and the yield of the reaction, respectively, was systematically investigated, and daidzein was obtained in 74.0% isolated yield under optimal conditions. Due to the facilitating effect of TfOH, the Friedel–Crafts acylation was completed within 10 min at 90 °C and the [5+1] cyclization was completed within 180 min at 25 °C. In addition, a possible reaction mechanism for this process was proposed. The results of the study may provide useful guidance for industrial production of daidzein on a large scale.

关键词: Synthesis, Optimal design, Chemical processes, Reaction mechanism