Fabrication of Fe₃O₄‐l‐dopa‐Cu^II/Sn^IV@Micro‐Mesoporous‐SiO₂ Catalyst Applied to Baeyer–Villiger Oxidation Reaction

Abstract

A Magnetic mFe3O4‐l‐dopa‐CuII/SnIV@micro‐mesoporous‐SiO2 catalyst was successfully prepared. The catalyst exhibits high and stable catalytic activity for the Baeyer–Villiger oxidation reaction with air as oxidant. Furthermore, the selectivity can reach nearly 100 %. Meanwhile the catalyst can be easily separated by an external magnet and reused at least up to five cycles without any notable loss in catalytic activity. In addition, the effect of Sn and Cu on the oxidation of cyclohexanone is discussed.

Catalytic and Stoichiometric Baeyer–Villiger Oxidation Mediated by Nonheme Peroxo-Diiron(III), Acylperoxo, and Iodosylbenzene Iron(III) Intermediates

“…These reactions have been commonly carried out by the use of expensive, shock-sensitive, and potentially explosive peroxycarboxylic acids as oxidants [1][2][3][4]. Peracids (iminoperacids) can be efficiently generated in situ from nitriles (solvent) and H 2 O 2 in the presence of solid bases or from aldehydes and dioxygen in the presence of metal compounds [5][6][7][8][9][10][11][12][13][14][15][16][17]. This way, the major disadvantages, namely handling large amounts of peracid, and the noncatalytic use of acid, can be avoided.…”

Metal-Free Mesoporous SiO2 Nanorods as a Highly Efficient Catalyst for the Baeyer–Villiger Oxidation under Mild Conditions

“…There are seldom other metal oxides except for stannide . While in the aldehydes/O 2 system, it usually employs different metallic catalysts, including metal complexes, hydrotalcite, metallic oxides, and supported metal and metal oxides, − because metal active sites could speed up the initiation of the radical chain reaction. However, these catalysts need a large amount of consumption of metal and are harmful to the environment due to metal pollution.…”

Enhanced Photoinduced Baeyer–Villiger Oxidation of Ketones by Introducing Trinuclear Ruthenium Clusters into Polyoxometalate-Based Metal–Organic Frameworks

“…The catalytic activity of CR-SiW 12 (catalyst dosage of 0.1 mol %, reaction time of 3 h, yield of 94.1%) was much higher than that of AcrH + ClO 4 – (catalyst dosage of 5 mol %, reaction time of 20 h, yield of 92%). Besides, compared with the conventional thermal-driven B–V oxidation of cyclohexanone (high temperature and pressure), our scheme has the advantages of mild reaction conditions, utilization of clean solar energy, high catalytic efficiency, and reusability, effectively reducing energy consumption, and avoiding the use of high-risk production equipment and other potential risks. − …”

“…In particular, the O 2 /aldehyde system known as the Mukaiyama method is very attractive in industrial production owing to its advantages of safety, green nonpollution, and high yield. , Recently, researchers have reported a lot of excellent work to develop a low-cost B–V oxidation process based on the Mukaiyama method. Nevertheless, conventional thermo-catalytic technologies often require high-temperature energy to trigger the catalytic reaction, which still suffers from the issues of high energy consumption and advanced facility requirements, thereby limiting the scalability of the process. − Recent studies show that photocatalytic technology has become a research hotspot in the field of organic synthesis by utilizing economical solar energy as the driving force, with advantages including mild reaction conditions, high selectivity, and environmental friendliness. − Consequently, the development of the photoinduced B–V oxidation process based on the Mukaiyama method is of great research significance.…”