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New 2-phenyl-4,5,6,7-tetrahydro-2H-indazole derivatives as paddy field herbicides

✍ Scribed by In Taek Hwang; Hyoung Rae Kim; Dong Ju Jeon; Kyung Sik Hong; Jong Hwan Song; Chang Kook Chung; Kwang Yun Cho

Publisher: John Wiley and Sons
Year: 2005
Tongue: English
Weight: 126 KB
Volume: 61
Category: Article
ISSN: 1526-498X
DOI: 10.1002/ps.992

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✦ Synopsis

Abstract

A series of 3‐chloro‐2‐(4‐chloro‐2‐fluorophenyl)‐4,5,6,7‐tetrahydro‐2__H__‐indazole derivatives containing various substituted isoxazolinylmethoxy groups at the 5‐position of the benzene ring were synthesized and their herbicidal activities assessed under greenhouse and flooded paddy conditions. Among them, compounds having a phenyl or cyano substituent at the 3‐position of the 5‐methyl‐isoxazolin‐5‐yl structure demonstrated good rice selectivity and potent herbicidal activity against annual weeds at 16–63 g AI ha^−1^ under greenhouse conditions. Field trials indicated that these two compounds controlled a wide range of annual weeds rapidly with a good tolerance on transplanted rice seedlings by pre‐emergence application. They showed a low mammalian and environmental toxicity in various toxicological tests. Copyright © 2005 Society of Chemical Industry

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