Abstract Reductive-coupling of nitro compounds and alcohols is a sustainable route for constructing C = N bonds in organonitrogen chemicals. yet challenging due to the inertness of α-Csp3-H bond in alcohols and the vulnerability of C = N bonds towards hydrogenation. Here. we report the surprising catalytic activity of ultrafine alkaline-earth metal oxide MgO nanoclusters (0. https://cosmeticssquadets.shop/product-category/brow-stamp/