Ceria-Modified Copper Phyllosilicate Catalyst for One-Pot Hydroamination of 5-HMF with Nitro-Compoundsстатья
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Дата последнего поиска статьи во внешних источниках: 17 апреля 2024 г.
Аннотация:Ceria-modified mineral-like copper catalyst 12 %Cu/SiO2−CeO2 showed a high activity and selectivity in one-pot hydroamination of bio-available 5-hydroxymethylfurfural with nitro-aromatic compounds. The catalyst was obtained by conventional deposition-precipitation method with urea from commercial silica, copper nitrate, and ammonium cerium (IV) nitrate. The synthesized catalyst with a copper phyllosilicate structure formed inside the pores of silica was studied by XRD, N2 adsorption, XPS, SEM and TEM methods. The possible scheme of 5-hydroxymethylfurfural hydroamination with nitro-aromatic compounds and an evolution of the catalyst structure during the reaction were proposed. The catalyst can be successfully recycled after calcination procedure. A number of N-furfurylamines were obtained for the first time over 12 %Cu/SiO2−CeO2 catalyst with the phyllosilicate structure directly from 5-hydroxymethylfurfural and nitro-aromatic compounds with the yields up to 85 %.