1-Iminoalkylimidazoles are obtained from the novel reaction of cuprous imidazolide with alkylhalides and nitriles. The condensation produces a new class of imidazole derivatives and the ease of the reactions suggests a reasonable scope. The compound N-(1-N-t-butylimino)ethylimidazole exhibits nematicidal activity against larvae of Meloidogyne javanica at 1 ppm.