A Recyclable Ferrite–Co Magnetic Nanocatalyst for the Oxidation of Alcohols to Carbonyl Compounds

Abstract

Magnetic cleansing: A magnetic Fe3O4–Co catalyst was prepared using inexpensive precursors and its catalytic activity was tested for the oxidation of alcohols using tert‐butyl hydroperoxide (TBHP) as the oxidant. The corresponding carbonyl compounds were obtained in good to excellent yields (see scheme); furthermore, this magnetic catalyst could be separated by magnetic decantation without significant loss in activity.

Solvent-Free Microwave-Induced Oxidation of Alcohols Catalyzed by Ferrite Magnetic Nanoparticles

“…The search for catalytic oxidation of alcohols in an aqueous medium in the absence of an additional base is still a significant challenge [23]. Among the numerous methods, oxidation of organic species to corresponding carbonyl compounds by O 2 , H 2 O 2 or t-BuOOH, so called "green oxidants", still requires high temperatures and/or long times [24][25][26], even when using iron oxide NPs as catalysts towards alcohol oxidation [27][28][29][30].…”

Magnetic CoFe2O4Nanoparticles as an Efficient Catalyst for the Oxidation of Alcohols to Carbonyl Compounds in the Presence of Oxone as an Oxidant

“…The electron withdrawing groups reduced the reaction rate dramatically (Entry 11) and the electron donating groups on the benzene ring accelerate the reaction rate (Entry 14). The oxidation for aliphatic alcohols proceeded quite slowly (Entry [17][18][19]. The competing reaction such as overoxidation of aldehydes to the corresponding carboxylic acids was not observed, either.…”

“…In comparison with the other oxidants such as O 2 or TBHP, oxidation by oxone accomplished at low temperatures and in short times. 18,19 The catalyst could be subsequently reused in six iterative cycles, without no obvious decrease in activity. The application of this nanocatalyst to different oxidation reactions is currently under investigation in our laboratory.…”

“…Hence, mild, catalytic, economic and efficient alternative methods was needed. [17][18][19] The search for catalytic oxidation of alcohols in an aqueous medium in the absence of an additional base is still a significant challenge.…”

Sustainable Nanocatalysts for Organic Synthetic Transformations

“…The tuning of important organic transformations and these newer generation of nanocatalysts worked very well together to achieve important products [11][12][13]. These versatile semi heterogeneous nanocatalysts with high surface area are the best alternatives to conventional catalysts, the highest catalytic activity, selectivity, and stability can be achieved by their shape, size, composition, and nature of nanocatalyst structure [8,14,15].…”