Copper single‐atom catalyst for efficient C─S coupling in thioether synthesis
Author(s)
Type
Journal Article
Abstract
Carbon-heteroatom cross-coupling reactions have become indispensable tools in synthetic chemistry. However, the formation of carbon–sulfur (C─S) bonds, which are essential for producing thioethers used in pharmaceuticals, agrochemicals, and advanced materials, remains significantly underdeveloped. Industrial C─S coupling methods still rely on expensive, homogeneous catalysts that suffer from poor recyclability and are susceptible to sulfur-induced deactivation. In this work, we report a copper single-atom catalyst, where Cu sites are atomically dispersed on mesoporous graphitic carbon nitride, to enable efficient, selective, and recyclable C─S cross-coupling reactions under mild conditions and on a gram scale. The catalyst exhibits excellent resistance to thiol poisoning and maintains high performance over multiple catalytic cycles. Advanced characterization techniques, including aberration-corrected electron microscopy, X-ray absorption spectroscopy, and single-atom-sensitive electron energy loss spectroscopy, confirm the atomic dispersion and stable coordination environment of Cu sites. Combined with density functional theory simulations and radical scavenging experiments, our mechanistic investigations support a concerted oxidative addition pathway, which excludes radical intermediates. These results provide key insights into heterogeneous C─S coupling and demonstrate the power of single-atom catalysts in addressing long-standing challenges in sulfur chemistry, paving the way toward greener and more scalable processes for fine chemical and pharmaceutical synthesis.
Date Issued
2025-09-15
Date Acceptance
2025-07-14
Citation
Angewandte Chemie International Edition, 2025, 64 (38)
ISSN
1433-7851
Publisher
Wiley
Journal / Book Title
Angewandte Chemie International Edition
Volume
64
Issue
38
Copyright Statement
© 2025 The Author(s). Angewandte Chemie International Edition published by Wiley-VCH GmbH This is an open access article under the terms of the Creative Commons Attribution License, which permits use, distribution and reproduction in any medium, provided the original work is properly cited.
License URL
Identifier
10.1002/anie.202510632
Publication Status
Published
Article Number
e202510632
Date Publish Online
2025-08-06