Chem. J. Chinese Universities ›› 2025, Vol. 46 ›› Issue (12): 20250187.doi: 10.7503/cjcu20250187

• Organic Chemistry • Previous Articles     Next Articles

Continuous Synthesis Process of Key Intermediates for the Herbicide Clethodim

REN Shilun1, HUANG Cheng1, CHEN Jianai1, LI Mimi1, MA Jingrui3, YUAN Qiliang2(), TAN Chengxia1()   

  1. 1.College of Chemical Engineering,Zhejiang University of Technology,Hangzhou 310014,China
    2.Zhejiang Zhongxin Fluorine Material Co. Ltd. ,Shaoxing 313269,China
    3.Shanghai Jiasheng Petrochemical Co. Ltd. ,Nanjing 210012,China
  • Received:2025-07-07 Online:2025-12-10 Published:2025-08-05
  • Contact: TAN Chengxia E-mail:yuanqiliang@126.com;tanchengxia@zjut.edu.cn
  • Supported by:
    the Programe of Yifan Bio-Tech Group Co. Ltd., China(KYY-HX-20240994)

Abstract:

Clethodim, known for its high efficacy, low toxicity, broad herbicidal spectrum, extended application window and safety to subsequent crops, has become a representative cyclohexenone herbicide. 5-[2-(Ethylthio) propyl]-2-propionyl-3-hydroxy-2-cyclohexen-1-one(abbreviated as Jing-Santong), a key intermediate of clethodim, faces challenges in traditional batch synthesis, such as low reaction efficiency and high energy consumption. This study developed a continuous-flow microchannel technology for the critical synthesis steps. By optimizing the cyclization and hydrolysis processes, the reaction time was reduced from 90 min to 4.8 min, achieving a 65.2% yield and 95.2% purity. The novel process significantly improves reaction efficiency and product quality, offering a promising approach for the industrial production of clethodim.

Key words: Herbicide, Clethodim, Microchannel continuous flow technology, Synthesis process

CLC Number: 

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