Synthesis and pesticidal activities of some substituted 1,2,4‐triazines

摘要

AbstractA series of 5,6‐diphenyl‐3‐substituted‐thio‐1,2,4‐triazines (II‐V) was prepared by treating 5,6‐diphenyl‐1,2,4‐triazine‐3‐thiol (I) with corresponding electrophiles. Condensation ofIVorVwith 1,2‐phenylenediamines gave 2‐(5,6‐diphenyl‐1,2,4‐triazin‐3‐yl) thiomethyl‐1H‐benzimidazoles (VI).IVwas converted into its corresponding hydrazide (VII) by the action of hydrazine hydrate.N‐Benzylidene derivatives (VIII) were prepared by the condensation ofVIIwith appropriate aryl or heterocyclic aldehydes. The pesticidal activities of all the