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Synthesis of a Novel Series of Imidazo[4,5-c]pyrazole Derivatives and Their Evaluation as Herbicidal Agents

✍ Scribed by Chiara B. Vicentini; Maurizio Manfrini; Manuela Mazzanti; Angelo Scatturin; Carlo Romagnoli; Donatella Mares

Publisher: John Wiley and Sons
Year: 1999
Tongue: English
Weight: 248 KB
Volume: 332
Category: Article
ISSN: 0365-6233
DOI: 10.1002/(sici)1521-4184(199910)332:10<337::aid-ardp337>3.0.co;2-p

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✦ Synopsis

Ever changing problems in agricultural weed control require periodic introduction of new herbicides. Imidazo[4,5-c]pyrazoles, which were considered of interest as potential herbicides, were synthesized and examined for the pre-emergence, post-emergence, and post-transplant control of weeds in rice against broadleaf and grass weed species. The data obtained suggest that some imidazo[4,5-c]pyrazoles have potential herbicidal activity against a wide range of weeds, with 5-methyl, 5-thiomethyl, and 5-unsubstituted derivatives being the most effective. No herbicidal activity was observed in the 5-methylsulfonylimidazo[4,5-c]pyrazole and imidazo[4,5-c]pyrazolone series.

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