Amide Bond Formation Catalyzed by Recyclable Copper Nanoparticles Supported on Zeolite Y under Mild Conditions

Abstract

A series of catalysts based on supported copper nanoparticles have been prepared and tested in the amide bond formation from tertiary amines and acid anhydrides, in the presence of tert‐butyl hydroperoxide as an oxidant. Copper nanoparticles on zeolite Y (CuNPs/ZY) was found to be the most efficient catalyst for the synthesis of amides, working in acetonitrile as solvent, under ligand‐ and base‐free conditions in air. The products were obtained in good to excellent yields and in short reaction times. The CuNPs/ZY system also exhibited higher catalytic activity than some commercially available copper and iron sources and it was reused in ten reaction cycles without any further pre‐treatment. This methodology has been successfully scaled‐up to a gram scale with no detriment to the yield.

Zeolite Immobilized Copper Catalyzed Conjugate Borylation of α,β-Unsaturated Compounds in Aqueous Media

“…[35] Thus, we intend to explore new types of catalyst which could be utilized in aqueous media. We conceived zeolite, a cheap and abundant material, may also be served as solid support to anchor copper active species because zeolite-Cu catalysts have been widely used in oxidations, [36] caybonylation, [37] amide formation, [38] Chan-Lam cross-coupling [39] and aryl acetylene homocoupling. [40] To the best of our knowledge, almost no examples of C-B bond formation catalyzed by using zeolite-Cu catalyst have been reported.…”

Two different facile and efficient approaches for the synthesis of various N-arylacetamides via N-acetylation of arylamines and straightforward one-pot reductive acetylation of nitroarenes promoted by recyclable CuFe2O4 nanoparticles in water

“…their extensive applications in various area such as peptide synthesis, agrochemicals, polymers, functional materials, dyes, fragrances and also existence in pharmaceuticals ( Figure 1) and natural products ( Figure 2) [11][12][13][14][15][16][17][18][19][20][21][22][23][24][25]. Due to the importance of amide compounds, developing simple, practical, environmentally benign, cost-and time-effective manners for their synthesis is very valuable and necessary.…”

A new and efficient methodology for olefin epoxidation catalyzed by supported cobalt nanoparticles

“…Therefore, there remains a need to develop and improve catalytic systems for alkene epoxidation by using low cost and easy to prepare supported cobalt nanoparticles as reusable heterogeneous catalysts [27] that are wide in substrate scope, active enough and highly selective. As part of our continuing interest in the development of new synthetic methodologies based on the use of catalysis by non-noble transition metal nanoparticles (MNPs) for their application in a wide range of relevant organic transformations [45][46][47][48][49][50][51][52], we report herein our study on the performance of CoNPs/MgO nanocatalyst for olefin epoxidation reactions. Compared to previous reports in the same field, it should be highlighted that our CoNPs/MgO catalyst is readily prepared from low-cost commercially available starting materials, works in acetonitrile as the solvent (thus avoiding the use of toxic DMF), and can be recovered and reused maintaining its high activity.…”