The insecticidal activity of newly synthesized substances (IV) containing both 2-chloro-5-methyl pyridine and 1,3,4-oxadiazole moieties is studied. -(HOLLA*, B. S.; PRASANNA, C. S.; POOJARY, B.; RAO, K. S.; SHRIDHARA, K.; BHAT, U. G.; Indian J.

Ring closure reactions O 0130 Synthesis, Characterization and Biological Studies of Some Triazolothiadiazines and Triazolothiadiazoles Containing 6-Chloropyridin-3-yl Methyl Moiety. -The new compounds (III), (V), and (VII) show neither antibacterial (E.coli, Pseudomonas areuginosa, Staphylococcus aureus, Bacillus subtilis) nor insecticidal activity against adult mosquitoes. -(HOLLA*, B. S.; PRASANNA, C. S.; POOJARY, B.; RAO, K. S.; SHRIDHARA, K.; Indian J.

Abstract5-(6-Chloropyridin-3-yl methyl)-4-phenyl-1,2,4-triazole-3-thiol (2) and 5-substituted-4-phenyl- 1,2,4-triazole-3-thiols (3) were synthesized. Alkylation and aminomethylation reactions of these triazoles were also carried out. Some of the newly synthesized compounds were screened for their antibacterial activities.

Pyridine derivatives R 0380Synthesis and Characterization of 1,3,4-Thiadiazole and 1,3,4-Oxadiazole Derivatives Containing 2-Chloropyridin-5-yl-methyl Moiety. -With a view to study their insecticidal activities, the title heterocycles (V) and (VI) are synthesized by cyclization of substituted thiosemicarbazides (IV) in the presence of a oxidizing or dehydrating agent, respectively. None of the new molecules shows insecticidal activity against adult mosquitoes. -(HOLLA*, B. S.; PRASANNA, C. S.; POOJARY, B.; RAO, K. S.; SHRIDHARA, K.; BHAT, U. G.; Indian J. Chem., Sect. B: Org. Chem.