Aerobic oxidation of biomass-derived 5-hydroxymethylfurfural to 2,5-diformylfuran with cesium-doped manganese dioxide

Abstract

Cesium-doped manganese dioxide (Cs/MnOx) was prepared by a soft template method, and was found to be active for the selective oxidation of HMF to DFF with molecular oxygen.

Selective oxidation of 5-hydroxymethylfurfural into 2,5-diformylfuran over VPO catalysts under atmospheric pressure

“…To date, there are plenty of catalysts employed in selective oxidation of HMF into DFF, such as the manganese oxide-based material, [6][7][8] GO-related materials, 9 supported Ru catalysts [10][11][12] and vanadium-based catalysts. [13][14][15][16] Zhang et al [17][18][19] have been committed to research in this area and developed a series of catalysts with excellent catalytic activity. Due to the high price of noble metal, developing cheap transition metal-based heterogeneous catalysts for the synthesis of DFF from the selective oxidation of HMF is thus highly desirable.…”

Synthesis of 5‐hydroxymethylfurfural from fructose and inulin catalyzed by magnetically‐recoverable Fe3O4@SiO2@TiO2–HPW nanoparticles

“…However, several drawbacks, such as the difficulty of catalyst recovery and the generation of acid wastes, limited the application of these homogeneous catalysts for the production of HMF at commercial scales . In recent years, a wide range of heterogeneous catalysts, including metal oxides, metal phosphates, zeolites, acid‐functionalized carbon, acid‐functionalized silicon dioxide (SiO 2 ), ion‐exchange resins, and metal–organic frameworks, have been studied for the synthesis of HMF, most of which have proven to have excellent activity and good reusability …”

“…14,16 In recent years, a wide range of heterogeneous catalysts, including metal oxides, metal phosphates, zeolites, acid-functionalized carbon, acid-functionalized silicon dioxide (SiO 2 ), ion-exchange resins, and metal-organic frameworks, have been studied for the synthesis of HMF, most of which have proven to have excellent activity and good reusability. [14][15][16]20,[28][29][30][31][32][33][34][35] Heteropolyacids with Keggin structures are strong Brønsted acids, and they have been recognized as a group of environmentally benign catalysts for a variety of chemical reactions. 5,30 As the strongest heteropolyacid, H 3 PW 12 O 40 (HPW) is widely used for industrial applications.…”

One-Pot Synthesis of 2,5-Diformylfuran from Fructose by Bifunctional Polyaniline-Supported Heteropolyacid Hybrid Catalysts

“…Among others, 2,5-diformylfuran (DFF), the partially oxidized product from 5-hydroxymethylfurfural (HMF), is considered as one of the most promising platform molecules owing to its broad potential as an intermediate for pharmaceuticals, fungicides, macrocyclic ligands, and as a cross-linker or monomer for novel polymeric materials [6,7]. Despite the high DFF yields (>90%) from the aerobic oxidation of pure HMF [8][9][10][11][12][13][14][15][16][17][18], the direct synthesis of DFF from fructose via HMF as an intermediate is more attractive since the separation and purification of HMF is energy-intensive because of the unstable characteristic of HMF during the acid-catalyzed HMF production. Nowadays, the development of a facile and highly selective "one-pot" strategy for fructose-to-DFF conversion is challenging.…”