A cobalt nitrate/hydrogen peroxide system as an efficient reagent for the synthesis of 2-aryl benzimidazoles and benzothiazoles.

Benzimidazoles and benzothiazoles show significant and promising activities against various viruses such as HIV and HCMV-1. Their synthesis using cobalt nitrate and hydrogen peroxide in N,N-dimethylformamide has been presented in the following study. The cobalt nitrate/H2O2 appears to be a smooth and efficient reagent system for the synthesis of 2-aryl substituted benzimidazoles and benzothiazoles.

Efficacy of 4-methyl-7-hydroxy coumarin derivatives against vectors Aedes aegypti and Culex quinquefasciatus.

4-Methyl-7-hydroxy coumarin is considered as a lead molecule as a biopesticide. Its mono bromo and tribromo derivatives were synthesized. Two more derivatives were synthesized by acylation.