Abstract
Amides are widely used in various fields of chemical and pharmaceutical industries. Developing a green and universal amide synthesis method that meets the needs of sustainable chemistry has always been a challenge for amide synthesis. In this paper, a direct and highly selective method for the synthesis of amide was developed under visible light irradiation and room temperature using air as an oxidant. Thanks to the prolongation of the C-H bond (0.1115 nm) and O-H bond (0.1002 nm) during the adsorption of hemiaminal on the Mn3O4 catalyst, and the energy barrier for hemiaminal dehydrogenation (-3.07 eV) is much lower than the energy barrier for dehydration (4.84 eV), thus the formation of imines is suppressed, resulting in highly selective clean production of amides with H2O as byproduct. Therefore, this clean and effective method for obtaining amides is one of the ideal alternative solutions for currently known methods.
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