Related Experiment Video
Updated: Jun 12, 2025
09:44
Design, Synthesis, and Photochemical Properties of Clickable Caged Compounds
Published on: October 15, 2019
12.2K
Hyperbranched Polysiloxane-Copper(II) Pyridylamine-Glycidoxypropyltrimethoxysilane Complex-Catalyzed Click Reactions
Maryam Borzooei1, Masoomeh Norouzi1, Masoud Mohammadi1
1Department of Chemistry, Faculty of Science, Ilam University, P.O. Box 69315516, Ilam, Iran.
ACS Omega
|June 9, 2025
Summary
A novel copper catalyst was synthesized using a one-pot method, creating a pyridylamine-functionalized hyperbranched polysiloxane ligand. This catalyst efficiently facilitates the click synthesis of 5-substituted 1H-tetrazoles with excellent yields and recyclability.
Area of Science:
- Materials Science
- Catalysis
- Organic Synthesis
Background:
- Development of efficient heterogeneous catalysts is crucial for sustainable chemical synthesis.
- Supported copper catalysts offer unique reactivity but often face challenges in stability and recyclability.
- Novel ligand design is key to enhancing catalyst performance and longevity.
Purpose of the Study:
- To synthesize a novel heterogeneous, supported copper catalyst using a one-pot method.
- To evaluate the catalytic activity of the synthesized complex in the click synthesis of 5-substituted 1H-tetrazoles.
- To assess the stability, reusability, and leaching properties of the novel catalyst.
Main Methods:
- One-pot synthesis involving simultaneous polymerization and ring-opening reactions of 3-glycidoxypropyltrimethoxysilane (GPTMS) with 2-Pyridylamine (2PA).
- Complexation of the resulting pyridylamine-functionalized hyperbranched polysiloxane (HBPSi) with copper (II) ions.
- Catalytic evaluation in the click synthesis of 5-substituted 1H-tetrazoles, including yield, reaction time, hot filtration, and leaching tests.
Main Results:
- Successful synthesis of a novel [Cu(II)-2PA-GPTMS-HBPSi] complex with a highly branched, regular framework.
- Demonstrated excellent catalytic activity in the click synthesis of 5-substituted 1H-tetrazoles, achieving high yields in short reaction times.
- Exhibited remarkable reusability and stability over five cycles, with minimal leaching, confirmed by hot filtration tests.
Conclusions:
- The developed one-pot method provides a convenient and efficient route for synthesizing functionalized hyperbranched polysiloxane ligands and their copper complexes.
- The [Cu(II)-2PA-GPTMS-HBPSi] complex is a highly effective and stable heterogeneous catalyst for click tetrazole synthesis.
- This approach offers a promising alternative for the design and application of advanced heterogeneous catalysts and materials.
Related Concept Videos
01:13Olefin Metathesis Polymerization: Overview
2.0K
Recently, the development of olefin metathesis polymerization advanced the field of polymer synthesis. Simply put, the reorganization of substituents on their double bonds between two olefins in the presence of a catalyst is known as the olefin metathesis reaction. The use of metathesis reaction for polymer synthesis is called olefin metathesis polymerization.
Ruthenium-based Grubbs catalyst is the most commonly used catalyst for olefin metathesis polymerization. Grubbs catalyst consists...
Ruthenium-based Grubbs catalyst is the most commonly used catalyst for olefin metathesis polymerization. Grubbs catalyst consists...
2.0K
02:26Preparation and Reactions of Sulfides
4.7K
Sulfides are the sulfur analog of ethers, just as thiols are the sulfur analog of alcohol. Like ethers, sulfides also consist of two hydrocarbon groups bonded to the central sulfur atom. Depending upon the type of groups present, sulfides can be symmetrical or asymmetrical. Symmetrical sulfides can be prepared via an SN2 reaction between 2 equivalents of an alkyl halide and one equivalent of sodium sulfide.
4.7K
01:16Cycloaddition Reactions: Overview
2.5K
Cycloadditions are one of the most valuable and effective synthesis routes to form cyclic compounds. These are concerted pericyclic reactions between two unsaturated compounds resulting in a cyclic product with two new σ bonds formed at the expense of π bonds. The [4 + 2] cycloaddition, known as the Diels–Alder reaction, is the most common. The other example is a [2 + 2] cycloaddition.
2.5K
![[4+2] Cycloaddition of Conjugated Dienes: Diels–Alder Reaction](/_next/image?url=https%3A%2F%2Fcloudfront.jove.com%2Ffiles%2Fmedia%2Fscience-education%2Fscience-education-thumbs%2F12417.jpg&w=3840&q=75)
01:16[4+2] Cycloaddition of Conjugated Dienes: Diels–Alder Reaction
10.1K
The Diels–Alder reaction is an example of a thermal pericyclic reaction between a conjugated diene and an alkene or alkyne, commonly referred to as a dienophile. The reaction involves a concerted movement of six π electrons, four from the diene and two from the dienophile, forming an unsaturated six-membered ring. As a result, these reactions are classified as [4+2] cycloadditions.
10.1K
01:16Cycloaddition Reactions: MO Requirements for Thermal Activation
3.5K
Thermal cycloadditions are reactions where the source of activation energy needed to initiate the reaction is provided in the form of heat. A typical example of a thermally-allowed cycloaddition is the Diels–Alder reaction, which is a [4 + 2] cycloaddition. In contrast, a [2 + 2] cycloaddition is thermally forbidden.
3.5K
00:57Cationic Chain-Growth Polymerization: Mechanism
2.3K
The cationic polymerization mechanism consists of three steps: initiation, propagation, and termination. In the initiation step of the polymerization process, the π bond of a monomer gets protonated by the Lewis acid catalyst, which is formed from boron trifluoride and water. The protonation of the π bond generates a carbocation stabilized by the electron‐donating group. In the propagation step, the π bond of the second monomer acts as a nucleophile and attacks the...
2.3K