Controllable Effect of Structural Modification of Sulfonylurea Herbicides on Soil Degradation

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• 作者：Xuewen Hua ; Shaa Zhou ; Minggui Chen ; Wei Wei ; Ming Liu ; Kang Lei ; Sha Zhou ; Yonghong Li ; Baolei Wang and Zhengming Li
• 刊名：Chinese Journal of Chemistry
• 出版年：2016
• 出版时间：November, 2016
• 年：2016
• 卷：34
• 期：11
• 页码：1135-1142
• 全文大小：563K
• ISSN：1614-7065

文摘

The study of soil degradation behaviors of sulfonylurea herbicides in relation to their different structural attributes is utmost important for us to comprehend the development of new eco-friendly herbicides. It is postulated that the structural modification of the chemical structures could influence their degradation rates in soil. Nine devised structures were synthesized to study their herbicidal activity as well as their soil degradation behaviors respectively. The novel compounds I-3–I-7 were characterized by UV, ¹H NMR and ¹³C NMR, MS and EA. Bioassays indicated that most of target compounds displayed superior herbicidal activities in comparison with Chlorsulfuron. Soil degradation results further confirmed our previous assumption that the introduction of electron-donating substituents at 5^th position of the benzene ring distinctly increased their degradation rates, among which dimethylamino and diethylamino groups can adjust the degradation rate to a more favorable status.