K. Joshi, R. Jain, A. Dandia
1990
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Journal
Pesticide Science
Abstract
Several fluorine-containing 9H-1,2,4-triazolo[4,3-a]benzimidazoles were synthesised using new methodology. 2-Hydrazinobenzimidazoles on acylation with acid anhydrides afforded 2-(acylhydrazino)benzimidazoles which, in turn, were cyclised with polyphosphoric acid to afford the title compounds. Representative compounds were screened for antibacterial, antifungal and herbicidal activities. The fluorinated derivatives showed enhanced antibacterial and antifungal activities on comparison to nonfluorinated analogues. Two of the derivatives showed 100% control of some grass weeds under pre-emergent conditions at 10 kg ha−1.