Journal
JOURNAL OF AGRICULTURAL AND FOOD CHEMISTRY
Volume 60, Issue 1, Pages 346-353Publisher
AMER CHEMICAL SOC
DOI: 10.1021/jf203974p
Keywords
benzo-1,2,3-thiadiazole-7-carboxylate derivatives; system acquired resistance; plant activator; field test
Funding
- National Basic Research Program of China (973 Program) [2010CB126100]
- National High Technology Research and Development Program of China (863 Program) [2011AA10A207]
- China 111 Project [B07023]
- Shanghai Leading Academic Discipline Project [B507]
- Fundamental Research Funds for the Central Universities
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Plant activators are a novel kind of agrochemicals that could induce resistance in many plants against a broad spectrum of diseases. To date, only few plant activators have been commercialized. In order to develop novel plant activators, a series of benzo-1,2,3-thiadiazole-7-carboxylate derivatives were synthesized, and the structures were characterized by H-1 NMR, IR, elemental analyses, and HRMS or MS. Their potential systemic acquired resistance as plant activators was evaluated as well. Most of them showed good activity, especially, fluoro-containing compounds 3d and 3e, which displayed excellent SAR-inducing activity against cucumber Erysiphe cichoracearum and Colletotrichum lagenarium in assay screening. Field test results illustrated that compounds 3d and 3e were more potent than the commercial plant activator, S-methyl benzo[1,2,3]thiadiazole-7-carbothioate (BTH) toward these pathogens. Further, the preparation of compound 3d is more facile than BTH with lower cost, which will be helpful for further applications in agricultural plant protection.
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