Copper-catalyzed C-N cross-coupling reactions for the preparation of aryl diamines applying mild conditions

In this work, aryl diamines were prepared by C-N cross-coupling reactions between aryl halides and ethylenediamine. These reactions were successfully catalyzed by low quantities of Cu2O or CuO (1 mol %) employing low reflux temperature and low diamine excess. Products were afforded in good yields (up to 95%).