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Relevant academic research and scientific papers

Zeo-click synthesis: CuI-zeolite-catalyzed one-pot two-step synthesis of triazoles from halides and related compounds

CuI-zeolites proved to be an efficient heterogeneous catalyst for the one-pot two-step synthesis of triazoles from halides or tosylates, sodium azide, and alkynes. The step and atom economies of this cascade reaction as well as water used as so

Novel Hybrid Thioamide Ligand Supported Copper Nanoparticles on SBA-15: A Copper Rich Robust Nanoreactor for Green Synthesis of Triazoles and Tetrazoles in Water Medium

Abstract: In this work, a new thioamide based ligand with reductive nature was designed for modification of mesoporous SBA-15. For this purpose, the channels of SBA-15 were modified with Tris(2-aminoethyl)amine (TAEA) groups and then reacted with S8 and phenyl acetylene to form thioamide groups via Willgerodt-Kindler reaction. This porous material proved to be an effective host for the immobilization of inexpensive Cu(II) ions. The catalytically active Cu(I) species were generated automatically due to the reductive nature of thioamide modified surface of catalyst without use of any toxic reducing agents. The well stabilized Cu(I) species into the nano-channels of SBA-15 were used for synthesis of various triazoles from sodium azide, phenyl acetylene and alkyl/benzyl halides or alkyl epoxides and various tetrazoles from sodium azide and aryl/alkyl nitriles under green mild aqueous reaction conditions. This catalytic system was used for 9 and 11 consecutive runs for synthesis of triazoles and tetrazoles, respectively. Graphic Abstract: [Figure not available: see fulltext.]

Greener synthesis of 1,2,3-triazoles using a copper(i)-exchanged magnetically recoverable β-zeolite as catalyst

Herein, we describe the preparation and thorough characterization of a novel magnetically recoverable copper(i)-exchanged β-zeolite and its use as an efficient catalyst for the synthesis of 1,2,3-triazoles via the one-pot three-component reaction of organic halides, terminal acetylenes, and sodium azide in water. The magnetically recoverable β-zeolite could be easily separated from the reaction mixture with the aid of a magnet and reused in several consecutive reactions. Importantly, a series of characterizations studies allowed us to disclose the mechanism for the deactivation of the catalyst, and therefore to propose a method for its reactivation.

Mechanistic study in azide-alkyne cycloaddition (CuAAC) catalyzed by bifunctional trinuclear copper(I) pyrazolate complex: Shift in rate-determining step

Trinuclear copper(I) pyrazolate [Cu(3,5-(CF3)2Pz)]3 was employed in a mechanistic study of azide-alkyne cycloaddition (CuAAC). It was shown that the copper complex operates as a bifunctional catalytic system (copper source

Design and Preparation of Hallow Mesoporous Silica Spheres Include CuO and Its Catalytic Performance for Synthesis of 1,2,3-Triazole Compounds via the Click Reaction in Water

Here, a novel nanostructured catalyst based on CuO included hallow mesoporous silica spheres (CuO–HMSS) was prepared for synthesis of 1,2,3-triazole compounds. The hallow silica spheres were synthesized via the hydrothermal procedure. The characterization

Immobilized copper nanoparticles on nitrogen-rich porous activated carbon from egg white biomass: A robust hydrophilic-hydrophobic balance catalyst for click reaction

Biomass conversion to carbonaceous materials and their use in various applications, such as capacitors, catalyst supports, and adsorbents, have attracted considerable attention from the viewpoint of green chemistry. In this regard, chicken egg white is on

Efficient multicomponent synthesis of 1,2,3-triazoles catalyzed by Cu(II) supported on PEI@Fe3O4 MNPs in a water/PEG300 system

A highly dispersible and magnetically recoverable Cu-PEI@Fe3O4 MNPs catalyst was prepared and success-fully applied in one-pot three-component coupling of terminal alkynes, sodium azide, and alkyl bromides/chlorides in water to give