A novel magnetic N-rich covalent triazine framework-copper(ii) complex as an efficient nanocatalyst for Ullmann coupling.
5 affiliations
- 1Ministry of Higher Education and Scientific Research, Research and Development Directorate Baghdad Iraq.
- 2Ministry of Higher Education and Scientific Research, Directorate of Studies, Planning and Follow-up Baghdad Iraq.
- 3Department of Pharmaceutical Chemistry, College of Pharmacy, University of Kut Wasit 52001 Iraq.
- 4College of Health and Medical Technology, Al-Ayen Iraqi University AUIQ Thi-Qar Iraq.
- 5Department of Chemistry, College of Science, Mustansiriyah University Baghdad Iraq.
Abstract
In the present work, we describe the development of a new nitrogen-rich polymer grafted onto hercynite magnetic nanoparticles (MNPs) for the stabilization of a copper catalyst. In this approach, the surface hydroxyl groups of hercynite were covalently bonded to cyanuric chloride, which was subsequently polymerized with melamine to generate a nitrogen-rich covalent triazine polymer network around the hercynite surface. This framework was then coordinated with copper to yield a new heterogeneous nanomagnetic copper catalyst. The as-prepared [hercynite@TCOP-Cu(ii)] was applied in Ullmann C-O coupling of various aryl halides with phenolic substrates using PEG-400 as an environmentally benign reaction medium, furnishing the corresponding diaryl ethers in good to excellent yields with high selectivity and short reaction times. Furthermore, the use of aniline and mercaptophenol provided the corresponding diarylamines and diaryl sulfides in excellent yields, confirming the generality and broad substrate scope of this methodology, as well as its efficiency in C-N and C-S cross-coupling reactions in addition to C-O couplings. The catalytic system exhibited a heterogeneous nature, excellent stability, and reusability over at least six consecutive recovery cycles via magnetic separation with minimal loss of activity. These findings highlight the potential of this nanocomposite as a practical, sustainable, and highly efficient catalyst for Ullmann-type coupling reactions.
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BibTeX
@article{hasan2026novel,
title = {{A novel magnetic N-rich covalent triazine framework-copper(ii) complex as an efficient nanocatalyst for Ullmann coupling.}},
author = {Mohammed Obaid Hasan and Athraa H Ahmed and Kasim S Hmood and Alaa Hamid Faisal and Ali Muneer},
journal = {RSC advances},
year = {2026},
month = oct,
doi = {10.1039/d6ra09208j},
url = {https://europepmc.org/article/MED/42948166},
note = {CC BY-NC},
}
RIS
TY - JOUR
TI - A novel magnetic N-rich covalent triazine framework-copper(ii) complex as an efficient nanocatalyst for Ullmann coupling.
AU - Mohammed Obaid Hasan
AU - Athraa H Ahmed
AU - Kasim S Hmood
AU - Alaa Hamid Faisal
AU - Ali Muneer
PY - 2026
DA - 2026/10/27
JO - RSC advances
DO - 10.1039/d6ra09208j
UR - https://europepmc.org/article/MED/42948166
AB - In the present work, we describe the development of a new nitrogen-rich polymer grafted onto hercynite magnetic nanoparticles (MNPs) for the stabilization of a copper catalyst. In this approach, the surface hydroxyl groups of hercynite were covalently bonded to cyanuric chloride, which was subsequently polymerized with melamine to generate a nitrogen-rich covalent triazine polymer network around the hercynite surface. This framework was then coordinated with copper to yield a new heterogeneous nanomagnetic copper catalyst. The as-prepared [hercynite@TCOP-Cu(ii)] was applied in Ullmann C-O coupling of various aryl halides with phenolic substrates using PEG-400 as an environmentally benign reaction medium, furnishing the corresponding diaryl ethers in good to excellent yields with high selectivity and short reaction times. Furthermore, the use of aniline and mercaptophenol provided the corresponding diarylamines and diaryl sulfides in excellent yields, confirming the generality and broad substrate scope of this methodology, as well as its efficiency in C-N and C-S cross-coupling reactions in addition to C-O couplings. The catalytic system exhibited a heterogeneous nature, excellent stability, and reusability over at least six consecutive recovery cycles via magnetic separation with minimal loss of activity. These findings highlight the potential of this nanocomposite as a practical, sustainable, and highly efficient catalyst for Ullmann-type coupling reactions.
SN - 2046-2069
ER -