1887
Volume 2013, Issue 1
  • EISSN: 2223-506X

Abstract

Attempts to produce greener bromination of 2-acetyl 9-fluorene with KBr+KBrO reagent using fly-ash:HO catalyst in aqueous media gave 9H-fluorenacylbromides. Generally, the halo-keto compounds possess insect antifeedant activities. Therefore, the insect antifeedant activities of these acyl bromides have been studied using 4th instar larvae against castor semilooper. Solvent free bromination method was used for synthesizing some 9H-fluorenacylbromides. They were characterized by UV, IR, NMR and mass spectroscopic data. Castor-leaf discs were used for evaluation of insect antifeedant activities of the synthesized acyl bromides. The yields of synthesized acyl bromides were over 60%. The physical constants, analytical and spectral data of these ketones has been determined. Halo substituted acyl bromides gave good insect antifeedant activities. Easy handling, non-hazardous and environmentally benign bromination methods have been adopted for synthesizing acyl bromides with good yields. Bromo substituted acyl bromides show better insect antifeedant activity.

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2013-07-01
2020-09-20
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  • Article Type: Research Article
Keyword(s): 9H-fluorenacyl bromides , fly-ash:H2O , Infrared spectra , Insect antifeedant activity and NMR spectra
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