A novel series of pyrethriods was designed and synthesized by connecting various eugenol derivatives to either a chrysanthematic acid or 2-(4-chlorophenyl)-3-methylbutanoic acid. The insecticidal activity of target compounds has been evaluated by an immersion method on the fourth instar larvae of Culex pipens quinquefasciatus. The results revealed that the larvae were sensitive to synthesized compounds. Varying substituents in both acid moiety and eugenol group resulted in new compounds that exhibited different contact toxicity. Compound 3a showed the highest activity and is currently under further investigation.