Premium
Studies on the novel pyridine sulfide containing SDH based heterocyclic amide fungicide
Author(s) -
Hua Xuewen,
Liu Wenrui,
Su Yanyan,
Liu Xinghai,
Liu Jingbo,
Liu Nannan,
Wang Guiqing,
Jiao Xueqin,
Fan Xiaoyi,
Xue Chenmeng,
Liu Yi,
Liu Ming
Publication year - 2020
Publication title -
pest management science
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 1.296
H-Index - 125
eISSN - 1526-4998
pISSN - 1526-498X
DOI - 10.1002/ps.5773
Subject(s) - fungicide , chemistry , botrytis cinerea , amide , succinate dehydrogenase , lead compound , mechanism of action , enzyme , biochemistry , biology , in vitro , botany
BACKGROUND Succinate dehydrogenase (SDH) has been identified as one of the most significant targets for fungicide discovery. To date, 23 commercial SDH inhibitor (SDHI) fungicides have been approved for plant protection since the first launch of carboxin in 1966, and extensively applied to combat destructive plant fungi. RESULTS In this project, 20 novel pyridine sulfide derivatives containing SDH‐based heterocyclic amide fungicide were designed, synthesized, and characterized by proton nuclear magnetic resonance ( 1 H‐NMR), carbon‐13 ( 13 C)‐NMR and high‐resolution mass spectrometry (HRMS). In vitro fungicidal activity experiment, the target compound I‐1 displayed excellent inhibitory rates against the common agricultural pathogens with half maximal effective concentration (EC 50 ) values of 5.2 to 39.8 μg mL −1 . The in vivo fungicidal activities demonstrated that the compound I‐1 could effectively prevent Botrytis cinerea from infecting tomato and cucumber leaves with the preventative rates of 67% and 50%. The mitochondrial membrane potential detection, SDH enzyme assay and the molecular docking simulation revealed that the mechanism of action of the compound I‐1 and the relevant interactions with the target enzyme may be similar to those of the control fluopyram. CONCLUSION The biological activity screening and validation of mechanism of action indicated that the compound I‐1 could be identified as a potential SDH inhibitor for further study. © 2020 Society of Chemical Industry