Abstract
A series of novel 1H‐indol‐2‐ol derivatives were synthesized and evaluated their antibacterial activities against rice bacterial leaf blight, tobacco bacterial wilt, and citrus canker caused by Xanthomonas oryzae pv. oryzae (Xoo), Ralstonia solanacearum, and Xanthomonas axonopodis pv. citri via the turbidimeter test in vitro. Antibacterial bioassay indicated that most compounds demonstrated good inhibitory effect against Xoo and Ralstonia solanacearum. Especially, compound 4k demonstrated the best inhibitory effect against Xoo with half‐maximal effective concentration (EC50) value of 8.27 μg/mL, which was even better than those of commercial agents Bismerthiazol and Thiodiazole copper.
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