ACS Catalysis Pub Date : 2025-05-29DOI: 10.1021/acscatal.4c07268
Jiguang Du, Mingyang Shi, Xuying Zhou, Xiujuan Cheng, Kunyang Cheng, Gang Jiang
{"title":"Monolayer Fullerene Networks for High-Performance Lithium–Sulfur and Sodium–Sulfur Batteries","authors":"Jiguang Du, Mingyang Shi, Xuying Zhou, Xiujuan Cheng, Kunyang Cheng, Gang Jiang","doi":"10.1021/acscatal.4c07268","DOIUrl":"https://doi.org/10.1021/acscatal.4c07268","url":null,"abstract":"In light of the detrimental effects of conventional energy sources on the environment, there is an imperative need to innovate energy storage systems. Lithium–sulfur (Li–S) and sodium–sulfur (Na–S) batteries are regarded as highly promising candidates for energy storage due to their high theoretical energy densities. Nevertheless, their practical commercialization has been impeded by several unresolved challenges. This study presents a comprehensive assessment of three types of fullerene monolayers as potential electrode materials for Li–S and Na–S batteries, utilizing first-principles calculations. The findings indicate that these monolayers can effectively immobilize Li<sub>2</sub>S<sub><i>n</i></sub> and Na<sub>2</sub>S<sub><i>n</i></sub> species while preserving their geometric conformation, and preventing dissolution into the electrolytes. Furthermore, the electrical conductivity of the fullerene monolayers is significantly enhanced following the adsorption of Li<sub>2</sub>S<sub><i>n</i></sub> and Na<sub>2</sub>S<sub><i>n</i></sub> clusters. The minimal free energy change associated with the sulfur reduction reaction (SRR) suggests that the fullerene monolayer demonstrates excellent catalytic performance, alongside a low energy barrier for the dissociation of Li<sub>2</sub>S and Na<sub>2</sub>S. Our research thus posits that fullerene monolayers possess considerable potential as electrode materials for lithium–sulfur and sodium–sulfur batteries.","PeriodicalId":9,"journal":{"name":"ACS Catalysis ","volume":"58 1","pages":""},"PeriodicalIF":12.9,"publicationDate":"2025-05-29","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144165349","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":1,"RegionCategory":"化学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
ACS Catalysis Pub Date : 2025-05-29DOI: 10.1021/acscatal.5c00343
Aindrila Mandal, Matthew Lim, Lili Zhang, Kuo-Wei Huang, Shashikant U. Dighe
{"title":"Synergistic Cobaloxime Catalysis for Photo-Dehydrogenative Transformations","authors":"Aindrila Mandal, Matthew Lim, Lili Zhang, Kuo-Wei Huang, Shashikant U. Dighe","doi":"10.1021/acscatal.5c00343","DOIUrl":"https://doi.org/10.1021/acscatal.5c00343","url":null,"abstract":"Cobaloxime catalysis has emerged as a powerful tool for promoting dehydrogenation reactions and enabling small-molecule functionalization under environmentally benign conditions. These transformations are essential for constructing sp<sup>2</sup>-hybridized C–C bonds, crucial for synthesizing high-value alkenes, arenes, and heterocycles with applications in pharmaceuticals, agrochemicals and advanced materials. The integration of cobaloxime with photoredox catalysis further enhances reaction efficiency, offering improved selectivity and yields under milder conditions. This review highlights recent advancements in the application of cobaloxime within metallaphotoredox catalysis, with a focus on its effectiveness in dehydrogenation processes that drive the formation of sp<sup>2</sup>-hybridized C–C bonds via hydrogen atom transfer (HAT) and related pathways.","PeriodicalId":9,"journal":{"name":"ACS Catalysis ","volume":"5 1","pages":""},"PeriodicalIF":12.9,"publicationDate":"2025-05-29","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144165382","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":1,"RegionCategory":"化学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
ACS Catalysis Pub Date : 2025-05-29DOI: 10.1021/acscatal.4c07859
Jiahui Kang, Jan Kloppenburg, Jiali Sheng, Zhenyu Xu, Kristoffer Meinander, Hua Jiang, Zhong-Peng Lv, Esko I. Kauppinen, Qiang Zhang, Xi Chen, Milla Vikberg, Olli Ikkala, Miguel A. Caro, Bo Peng
{"title":"Anomalous Enhancement of the Electrocatalytic Hydrogen Evolution Reaction in AuPt Nanoclusters","authors":"Jiahui Kang, Jan Kloppenburg, Jiali Sheng, Zhenyu Xu, Kristoffer Meinander, Hua Jiang, Zhong-Peng Lv, Esko I. Kauppinen, Qiang Zhang, Xi Chen, Milla Vikberg, Olli Ikkala, Miguel A. Caro, Bo Peng","doi":"10.1021/acscatal.4c07859","DOIUrl":"https://doi.org/10.1021/acscatal.4c07859","url":null,"abstract":"Energy- and resource-efficient electrocatalytic water splitting is of paramount importance to enable hydrogen production. The best bulk catalyst for the hydrogen evolution reaction (HER), platinum, is one of the scarcest elements on Earth. The use of nanoclusters significantly reduces the amount of raw material required for HER, while nanoalloying further enhances performance by modulating hydrogen adsorption. However, the interplay between the atomic structure and HER performance in alloyed nanoclusters remains unclear. In this study, we report an anomalous HER enhancement at low and intermediate Au contents in monodisperse AuPt nanoclusters immobilized on carbon nanotubes. This enhancement is driven by the segregation of Au atoms toward the nanocluster surface and a synergistic effect, whereby the ability of surface Pt atoms to bind hydrogen is increased in the presence of adjacent Au atoms. This enhancement is noteworthy and “anomalous”, given that the overall hydrogen adsorption activity significantly decreases for pure Au nanoclusters compared to pure Pt nanoclusters. We rationalize these observations by combining extensive experimental characterization data with detailed atomistic simulations based on purpose-built machine learning interatomic potential and Markov-chain Monte Carlo simulations with variable chemical potential. The agreement between simulation and experiment allows us to develop a mechanistic understanding of the atomic-scale processes underlying the enhanced HER activity.","PeriodicalId":9,"journal":{"name":"ACS Catalysis ","volume":"3 1","pages":""},"PeriodicalIF":12.9,"publicationDate":"2025-05-29","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144165350","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":1,"RegionCategory":"化学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
ACS Catalysis Pub Date : 2025-05-29DOI: 10.1021/acscatal.5c01446
Kui Xu, Yao Xiao, Sijia Liu, Guiying Wu, Bingbing Luo, Jingru Jin, Xianfeng Yi, Aoqiang Peng, Jianhong Gong, Anmin Zheng, Fang Jin
{"title":"Peroxidation Activation of Ethane with Hydrogen and Oxygen by Au-Based MWW Zeolite Acidic Catalyst","authors":"Kui Xu, Yao Xiao, Sijia Liu, Guiying Wu, Bingbing Luo, Jingru Jin, Xianfeng Yi, Aoqiang Peng, Jianhong Gong, Anmin Zheng, Fang Jin","doi":"10.1021/acscatal.5c01446","DOIUrl":"https://doi.org/10.1021/acscatal.5c01446","url":null,"abstract":"The oxidative activation of ethane to produce ethene and oxygenates has attracted wide interest. An alternative reaction process for peroxidation activation of ethane in the presence of H<sub>2</sub> and O<sub>2</sub> at mild temperatures is performed by Au-based MWW zeolite acidic catalysts to produce acetic acid and ethene without the CO<sub><i>x</i></sub> generation. A nanometal oxide encapsulated Au nanoparticle catalyst was synthesized by homogeneously distributing Au nanoparticles on the atom-planting introduced TiO<sub><i>x</i></sub> or SnO<sub><i>x</i></sub> in the hydroxyl group of MWW zeolite. The Au cluster size, the catalyst Brønsted, and Lewis acidity determine the stability of in situ generated H<sub>2</sub>O<sub>2</sub> and control acetic acid and ethene selectivity. We propose a heterogeneous catalytic mechanism in which the Au cluster can promote ethane activation through α-H cracking of the C–H bond; this activated ethane then interacts with hydroperoxyl radicals (HOO*) on the Au cluster surface or the hydroxyl radicals (OH*) from decomposition of the in situ generated H<sub>2</sub>O<sub>2</sub>, and ethylhydrogen peroxide and ethanol are formed as key reaction intermediates for acetic acid. The Au surface OH* can promote β-H scission of ethane dehydrogenation for ethene. The Brønsted acid and Au–Ti in aluminosilicate MWW zeolite can activate ethane at 623 K and stabilize hydroperoxyl radicals with an acetic acid productivity of 4.04 mol g<sub>Au</sub><sup>–1</sup> h<sup>–1</sup> and 87.08% selectivity. At 823 K, Au–Sn in deborosilicate MWW zeolite promotes ethane dehydrogenation to ethene with a productivity of 4.33 mol g<sub>Au</sub><sup>–1</sup> h<sup>–1</sup> and 98.5% selectivity.","PeriodicalId":9,"journal":{"name":"ACS Catalysis ","volume":"5 1","pages":""},"PeriodicalIF":12.9,"publicationDate":"2025-05-29","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144165386","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":1,"RegionCategory":"化学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
{"title":"Beyond Equilibrated Structures: Sequential Lattice Oxygen Evolution Shapes Mars–van Krevelen Catalytic Oxidation on β-MnO2(110)","authors":"Yuan Fang, Bohua Wang, Zhangyun Liu, Zheng Chen, Mingfeng Li, Xin Xu","doi":"10.1021/acscatal.5c00169","DOIUrl":"https://doi.org/10.1021/acscatal.5c00169","url":null,"abstract":"Catalytic oxidation on a large number of reducible transition metal oxides can be described by the Mars–van Krevelen (MvK) mechanism, wherein the redox behavior of lattice oxygen (O<sub>lat</sub>) plays a central role. As a result, the formation energy (<i>E</i><sub>vac</sub>) of the oxygen vacancy (O<sub>V</sub>), typically derived from a stoichiometric or thermodynamically equilibrated surface, is widely used as a descriptor of the catalytic activity. However, this approach overlooks the dynamic evolution of the surface due to the continuous consumption of O<sub>lat</sub> during the reaction. In this work, using CO oxidation on β-MnO<sub>2</sub>(110) as a probe, we combine density functional theory and kinetic Monte Carlo simulations to demonstrate the importance of sequential consumption and regeneration of O<sub>lat</sub> in dictating catalytic performance. We find that <i>E</i><sub>vac</sub> is not static but varies with O<sub>V</sub> concentration, altering the equilibrium between O<sub>lat</sub> reduction and regeneration. As the accumulation of O<sub>V</sub> shifts the reaction mechanism from being reduction-dominated to regeneration-dominated, the steady-state surface composition deviates significantly from the prediction based on the thermodynamic equilibrium model. Only by accounting for the dynamic variation of O<sub>lat</sub> can the simulated apparent activation energies and reaction orders be closely reconciled with experimental observations. This work challenges the traditional reliance on the initial <i>E</i><sub>vac</sub> and offers a more accurate portrayal of catalytic oxidation within the MvK mechanism, which provides useful guidance for predicting and optimizing catalytic activity toward real-world applications.","PeriodicalId":9,"journal":{"name":"ACS Catalysis ","volume":"57 1","pages":""},"PeriodicalIF":12.9,"publicationDate":"2025-05-29","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144165381","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":1,"RegionCategory":"化学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
{"title":"Synergy of Oxygen Vacancies and Confinement Effect in CO2 Reforming of Toluene over Hydrotalcite-Derived Hollow-Sphere NiCo@Al2O3 Catalysts","authors":"Yongqi Kuang, Nadeemuddin Sk, Jing Dai, Sonali Das, Shuzhuang Sun, Shibo Xi, Lina Liu","doi":"10.1021/acscatal.5c02360","DOIUrl":"https://doi.org/10.1021/acscatal.5c02360","url":null,"abstract":"CO<sub>2</sub> reforming of tar is a promising pathway for the simultaneous conversion of undesirable tars and CO<sub>2</sub> generated from biomass gasification, which is critical for syngas upgrading and utilization. However, catalyst deactivation caused by coking is a severe issue for supported catalysts in this application. In this study, hydrotalcite-derived NiCo alloys supported by Al<sub>2</sub>O<sub>3</sub> nanosheet self-assembled hollow spheres were constructed by a template-sacrificial coprecipitation method. The hollow-sphere CS@NiCo(CP) catalyst exhibited superior activity and stability compared to NiCo(CP), NiCo(HT), and CS/NiCo(HT) catalysts synthesized by conventional coprecipitation, conventional hydrothermal, and template-sacrificial hydrothermal methods. The confinement effect of the hollow structure and porous shells enriched the local concentrations of CO<sub>2</sub> relative to toluene adjacent to the catalytic sites, owing to the high diffusion resistance of toluene through the shell. Furthermore, the abundant oxygen defects and stronger basic sites in the CS@NiCo(CP) catalyst further facilitated the adsorption and activation of CO<sub>2</sub> and provided higher quantities of active oxygen species for the gasification and elimination of surface carbon intermediates produced by toluene cleavage. <i>In situ</i> diffuse reflectance infrared Fourier transform spectroscopy (DRIFTS) experiments suggest that abundant oxygen defects in the catalyst accelerated the critical steps of the ring-opening and oxidation of toluene.","PeriodicalId":9,"journal":{"name":"ACS Catalysis ","volume":"25 1","pages":""},"PeriodicalIF":12.9,"publicationDate":"2025-05-28","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144153980","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":1,"RegionCategory":"化学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
ACS Catalysis Pub Date : 2025-05-28DOI: 10.1021/acscatal.5c00591
Tuo Zhang, Kaige Shi, Baodui Wang, Xiangyang Hou
{"title":"Mechanistic Insights into the Intercorrelation between the Hydrogen Evolution Reaction and Nitrate Reduction to Ammonia: A Review","authors":"Tuo Zhang, Kaige Shi, Baodui Wang, Xiangyang Hou","doi":"10.1021/acscatal.5c00591","DOIUrl":"https://doi.org/10.1021/acscatal.5c00591","url":null,"abstract":"The industrial synthesis of ammonia is characterized by harsh conditions, high energy consumption, and significant environmental pollution. In contrast, electrocatalytic nitrate reduction under ambient conditions presents a potential green and sustainable alternative to the energy-intensive industrial process. Hydrogen evolution reaction (HER), one of the most fundamental reactions in nature, is closely linked to the reaction mechanism of electrocatalytic nitrate reduction to ammonia (NRA), particularly in electrocatalysis, as both processes rely on proton transfer and electron exchange. The reactive hydrogen intermediates in HER often interact with the hydrogenation process in NRA, making it crucial to understand their interplay for the development of efficient electrocatalysts. By tuning the properties of electrocatalysts, water splitting can be elevated or suppressed to a point that enhances the selectivity of NRA, thereby optimizing ammonia production yields. However, there has been little systematic review of the mechanistic relationship between HER and NRA. This perspective provides a comprehensive overview of theoretical and experimental advances in HER and NRA processes, with a particular emphasis on their mechanistic relevance.","PeriodicalId":9,"journal":{"name":"ACS Catalysis ","volume":"183 1","pages":""},"PeriodicalIF":12.9,"publicationDate":"2025-05-28","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144153977","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":1,"RegionCategory":"化学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
{"title":"Remote Stereocontrol in the C6-Functionalization of Indoles via Synergistic Ion-Pair Catalysis","authors":"Zhi-Qiang Zhu, Han-Peng Pan, Liang Long, Ze-Yu Su, Ai-Jun Ma, Jin-Bao Peng, Hao Gao, Guo-Dong Chen, Yong-Heng Wang, Xiang-Zhi Zhang","doi":"10.1021/acscatal.5c00780","DOIUrl":"https://doi.org/10.1021/acscatal.5c00780","url":null,"abstract":"Remote stereocontrol is a long-standing challenge in synthetic chemistry due to the diminishing influence of a catalyst’s chiral environment over extended distances. This limitation is particularly pronounced in the enantioselective C6-functionalization of indoles, a transformation of significant interest in pharmaceutical research and natural product synthesis. We herein present a visible-light-induced direct asymmetric C6-functionalization of indoles achieved through synergistic dual catalysis employing a chiral phosphoric acid and magnesium sulfate, which achieves precise remote stereocontrol. The reaction proceeds via an alkyne-carbonyl metathesis/1,6-addition cascade involving arylalkynes, benzoquinones, and indoles. This strategy facilitates the de novo synthesis of diverse enantioenriched indoles with acyclic all-carbon quaternary chiral centers at the C6 position, delivering high yields and enantioselectivities from simple and readily available starting materials. Moreover, the resulting products can be easily transformed into a range of structurally diverse molecules with all-carbon quaternary chiral centers, which are otherwise difficult to synthesize with a high enantiomeric purity. Several products also exhibit promising anticancer activities, highlighting their potential pharmaceutical relevance. Computational and experimental investigations reveal that magnesium sulfate significantly promotes the formation of the reaction precursor (binding free energy: −68.5 kcal/mol), demonstrating its strong capacity to bind reactant components even at low concentrations, which would markedly enhance the reaction productivity, as long as the reaction barrier is feasible. Moreover, magnesium sulfate promotes parallel π–π stacking interactions between the aromatic ring of the <i>para</i>-quinone methide intermediate and the indole ring, thereby enhancing both reactivity and enantioselectivity.","PeriodicalId":9,"journal":{"name":"ACS Catalysis ","volume":"18 1","pages":""},"PeriodicalIF":12.9,"publicationDate":"2025-05-28","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144153978","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":1,"RegionCategory":"化学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
ACS Catalysis Pub Date : 2025-05-28DOI: 10.1021/acscatal.5c01388
Ahmed O. Elnabawy, Manos Mavrikakis
{"title":"Nanocluster Active Sites Formed on Heterogeneous Thermal Catalysts and Electrocatalysts by Operando Reactive Environments","authors":"Ahmed O. Elnabawy, Manos Mavrikakis","doi":"10.1021/acscatal.5c01388","DOIUrl":"https://doi.org/10.1021/acscatal.5c01388","url":null,"abstract":"Figure 1. (A) A simplified, atomic-scale illustration of the cluster formation process on a metal nanoparticle catalyst in the presence of reaction intermediates (e.g., NH<sub>3</sub>). (23) The scissors schematically denote where the adsorbate-induced metal–metal bond cleavage events might easiest take place (i.e., along the edges, corners, and kink sites), especially upon heating (represented by the triangle below the arrow), leaving vacancies behind. (B) Illustration of the metal nanocluster formation process on a close-packed terrace due to ejection of kink or step-edge atoms. Dashed circles indicate kink and step-edge vacancies formed after metal atom ejection. Green, blue, yellow, and red spheres represent metal atoms on a (kinked) step edge, adatoms and clusters on the terrace, terrace metal atoms (the shaded area denotes the upper terrace atoms at the top-left corner); and adsorbate species (atomic or molecular), respectively. (C) Schematic representations of each energy term in the definition for the adatom formation energy due to ejection of a (874) kink atom, both under vacuum or in the presence of an adsorbate. Figure adapted with permission from refs (23,29). Copyright 2023 The American Association for the Advancement of Science. Figure 2. Heatmap of calculated adsorbate-induced adatom formation energies on close-packed terraces: (111), (0001), and (110) for FCC, HCP, and BCC, respectively. First row in the table provides entries under vacuum. “*” denotes cases where the close-packed terrace is the preferred ejection source; in all other cases, the defect sites are the preferred ejection sources (kink sites for FCC metals, regular step-edge sites for BCC and HCP metals). Gray-faded numbers indicate systems in which the adsorbate hinders adatom formation. All energy values were evaluated at the low-coverage limit of each adsorbate. Energies were calculated with GGA-PBE. The metals are listed from left to right in ascending order of experimental bulk cohesive energy. (47) The figure is replotted using data/adapted with permission from ref (23). Copyright 2023 The American Association for the Advancement of Science, and adapted from ref (28). Copyright 2023, The Authors, American Chemical Society under a Creative Commons license (CC-BY-NC-ND 4.0, https://creativecommons.org/licenses/by-nc-nd/4.0/). Where the estimated temperatures (for 1 ejection/sec) based on the calculated thermochemical energetics (within ∼ 0.2 eV typical of DFT error (32)) of metal atom ejection and subsequent nanocluster formation are lower than or close to typical applied temperatures (as cited from the corresponding references for each application). Revisiting the nature of the active site and the details of the reaction mechanism in these systems might be warranted. Figure 3. (A) Brønsted–Evans–Polanyi correlation between the activation energy barrier and the reaction energy for the CO-induced Cu atom ejection from the (874) kink site at various CO coverages. (B","PeriodicalId":9,"journal":{"name":"ACS Catalysis ","volume":"31 1","pages":""},"PeriodicalIF":12.9,"publicationDate":"2025-05-28","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144165387","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":1,"RegionCategory":"化学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
{"title":"Iron-Carbene-Mediated Catalytic Activation of Conventional Thioglycosides for Stereoselective 1,2-cis-Furanosylations","authors":"Surya Pratap Singh, Umesh Chaudhary, Chance W. Lander, Adrienne Daroczi, Yihan Shao, Indrajeet Sharma","doi":"10.1021/acscatal.5c02301","DOIUrl":"https://doi.org/10.1021/acscatal.5c02301","url":null,"abstract":"The catalytic activation of glycosyl donors using earth-abundant metals, particularly iron (Fe), remains a significant challenge in achieving 1,2-<i>cis</i> glycosylations. Accessing the most catalytically activated donors requires multiple steps and a carefully designed process including the most stable and commonly used thioglycoside donors. Conventional thioglycosides, which are readily accessible, often necessitate stoichiometric amounts of activators or harsh reaction conditions for activation, making it quite challenging to achieve stereoselective glycosylation, especially 1,2-<i>cis</i> selectivity. In this work, we developed an iron-carbene-mediated catalytic activation method for conventional thioglycosides. This one-pot approach exhibits high chemoselectivity, favoring <i>S</i>-insertion into the carbene over the insertion into the O–H, resulting in a sulfur ylide, a suitable leaving group. Upon elimination, the resulting sulfonium ion generates an oxocarbenium ion, which, through C2–O–iron coordination, directs incoming glycosyl acceptors from the <i>cis</i>-face, ensuring high 1,2-<i>cis</i> stereoselectivity. The induction of high 1,2-<i>cis</i> selectivity through an iron-chelation mechanism is further supported by density functional theory (DFT) studies. This methodology demonstrates broad applicability, accommodating various glycosyl donors such as <span>d</span>-ribose, <span>d</span>-arabinose, and <span>l</span>-arabinose, along with a wide range of glycosyl acceptors. We successfully applied this strategy to synthesize the challenging 1,2-<i>cis</i> ribotetrafuranoside, further underscoring its synthetic utility.","PeriodicalId":9,"journal":{"name":"ACS Catalysis ","volume":"14 1","pages":""},"PeriodicalIF":12.9,"publicationDate":"2025-05-28","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144153979","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":1,"RegionCategory":"化学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}