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Chemistry and Industry of Forest Products ›› 2023, Vol. 43 ›› Issue (3): 89-100.doi: 10.3969/j.issn.0253-2417.2023.03.011

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Synthesis and Herbicidal Activity of Tetrahydrolinalyl Amides

Hongmei ZHANG1,2, Jing WANG1,2, Yuxiang CHEN1, Shichao XU1, Jianxin JIANG2, Zhendong ZHAO1,*()   

  1. 1. Institute of Chemical Industry of Forest Products, CAF; Key Lab. of Biomass Energy and Material, Jiangsu Province; Key Lab. of Chemical Engineering of Forest Products, National Forestry and Grassland Administration; National Engineering Research Center of Low-Carbon Processing and Utilization of Forest Biomass; Jiangsu Co-Innovation Center of Efficient Processing and Utilization of Forest Resources, Nanjing 210042, China
    2. College of Materials Science and Technology, Beijing Forestry University, Beijing 100083, China
  • Received:2022-01-11 Online:2023-06-28 Published:2023-06-27
  • Contact: Zhendong ZHAO E-mail:zdzhao@189.cn

Abstract:

Seventeen tetrahydrolinalyl amides(2, 4a-4p) were designed and synthesized using tetrahydrolinalool as starting material. Their structures were characterized by FT-IR, 1H NMR, 13C NMR and HRMS, then the herbicidal activities against Lolium perenne and Echinochloa crusgalli were evaluated. The results showed that the tetrahydrolinalyl amides exhibited certain growth inhibitory effects on L. perenne and E. crusgalli. Compounds 2, 4a, 4o showed the best pre-emergence herbicidal activity against L. perenne, where the inhibitory concentration 50%(IC50) values for the root growth of L. perenne were 0.05, 0.05, and 0.04 mmol/L, respectively(weaker than that of the positive control glyphosate), and the IC50 values for the shoot of L. perenne were 0.06, 0.05, and 0.05 mmol/L, respectively(stronger than that of glyphosate). The IC50 values of compound 4b on root and shoot growth of E. crusgalli were 0.06 and 0.15 mmol/L(equal to that of glyphosate), respectively. The structure-activity relationship analysis showed that tetrahydrolinayl amides exhibited selectivity among different weed species. The compounds containing alkyl group showed higher herbicidal activity than that of benzene ring and furan ring. The herbicidal activity of compounds with electron-donating group on benzene ring was stronger than that with electron-withdrawing group, exhibiting better activity when it was located at the ortho- and meta-position of benzene ring.

Key words: tetrahydrolinalool, tetrahydrolinalyl amine, amides, herbicidal activity

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