Chinese Journal of Chemistry最新文献

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Inside Cover Picture 封面内页图片
IF 5.5 1区 化学
Chinese Journal of Chemistry Pub Date : 2024-10-15 DOI: 10.1002/cjoc.202490222
{"title":"Inside Cover Picture","authors":"","doi":"10.1002/cjoc.202490222","DOIUrl":"https://doi.org/10.1002/cjoc.202490222","url":null,"abstract":"<p>Practical CO<sub>2</sub> and CO electroreduction are often operated at elevated temperatures, yet the correlation between the temperature increase and catalytic activity and selectivity has not been well-defined. This study uncovers that higher temperatures enhance *CO coverages, but in CO<sub>2</sub> reduction, they also promote *CO desorption to vapor-phase CO, lowering C<sub>2</sub>H<sub>4</sub> selectivity. In CO reduction, elevated temperatures facilitate CO diffusion to overcome the unfavorable *CO adsorption thermodynamics, which promotes C—C coupling. More details are discussed in the article by Wang <i>et al</i>. on pages 2705—2711.\u0000\u0000 <figure>\u0000 <div><picture>\u0000 <source></source></picture><p></p>\u0000 </div>\u0000 </figure></p>","PeriodicalId":151,"journal":{"name":"Chinese Journal of Chemistry","volume":"42 22","pages":"2686"},"PeriodicalIF":5.5,"publicationDate":"2024-10-15","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://onlinelibrary.wiley.com/doi/epdf/10.1002/cjoc.202490222","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142435545","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":1,"RegionCategory":"化学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 0
Catalyst-Free, Radical Tri- and Difluoromethylation of Isocyanides and N-Arylacrylamides Using Rotating Magnetic Field and Metal Rods 利用旋转磁场和金属棒的无催化剂、自由基异氰化物和n -芳基丙烯酰胺的三氟甲基化和二氟甲基化
IF 5.5 1区 化学
Chinese Journal of Chemistry Pub Date : 2024-10-07 DOI: 10.1002/cjoc.202400854
Xuliang Han, Haodong Liu, Xiaomei Feng, Fuchao Jia, Zengdian Zhao, Xinjin Li
{"title":"Catalyst-Free, Radical Tri- and Difluoromethylation of Isocyanides and N-Arylacrylamides Using Rotating Magnetic Field and Metal Rods","authors":"Xuliang Han,&nbsp;Haodong Liu,&nbsp;Xiaomei Feng,&nbsp;Fuchao Jia,&nbsp;Zengdian Zhao,&nbsp;Xinjin Li","doi":"10.1002/cjoc.202400854","DOIUrl":"https://doi.org/10.1002/cjoc.202400854","url":null,"abstract":"<div>\u0000 \u0000 <p>The pursuit of sustainable and environmentally benign synthetic methods continues to challenge organic chemists. Herein, we introduce a magnetoredox system for tri- and difluoromethylation of isocyanides and <i>N</i>-arylacrylamides using a rotating magnetic field and steel rods. This magnetoredox approach enables facile synthesis of functionalized phenanthridines and oxindoles without the need for catalysts and additives under mild conditions. Such a system potentially represents an attractive strategy for selective formation of bonds through multifaceted regulation of magnetic intensity, rotating frequency, and rod size.</p>\u0000 <p>\u0000 </p>\u0000 </div>","PeriodicalId":151,"journal":{"name":"Chinese Journal of Chemistry","volume":"43 2","pages":"155-160"},"PeriodicalIF":5.5,"publicationDate":"2024-10-07","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142868130","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}
引用次数: 0
Exploring the Magnetism of C5/C2B3 Heteroleptic Organolanthanide Sandwiches C5/C2B3杂电有机镧系三明治的磁性研究
IF 5.5 1区 化学
Chinese Journal of Chemistry Pub Date : 2024-10-07 DOI: 10.1002/cjoc.202400730
Ye-Ye Liu, Qian-Cheng Luo, Peng-Bo Jin, Yan-Zhen Zheng
{"title":"Exploring the Magnetism of C5/C2B3 Heteroleptic Organolanthanide Sandwiches","authors":"Ye-Ye Liu,&nbsp;Qian-Cheng Luo,&nbsp;Peng-Bo Jin,&nbsp;Yan-Zhen Zheng","doi":"10.1002/cjoc.202400730","DOIUrl":"https://doi.org/10.1002/cjoc.202400730","url":null,"abstract":"<div>\u0000 \u0000 <p>Two families of cyclopentadienyl (Cp)/carboranyl heteroleptic sandwiched organolanthanide complexes, namely [Ln{<i>η</i><sup>5</sup>:<i>σ</i>-Me<sub>2</sub>C(C<sub>5</sub>H<sub>4</sub>)(C<sub>2</sub>B<sub>10</sub>H<sub>10</sub>)}<sub>2</sub>][Li(DME)<sub>3</sub>] (<b>1Ln</b>, Ln = Tb, Dy, Ho, Er) and [2-THF-2'-(<i>μ</i><sup>2</sup>-Cl)Li(THF)<sub>3</sub>-2,2'-Ln(<i>nido</i>-1,7-C<sub>2</sub>B<sub>9</sub>H<sub>11</sub>)Cp*] (<b>2Dy</b>), were synthesized. Family of <b>1Ln</b> has been proposed based on the mixing-ligands idea by linking Cp and <i>nido</i>-dicarborllide. However, the carborane cage of [Me<sub>2</sub>C(C<sub>5</sub>H<sub>4</sub>)(C<sub>2</sub>B<sub>10</sub>H<sub>10</sub>)]<sup>2−</sup> deprotons and forms a mono-C<sup>−</sup> anion rather than deboron to form dicarborllide dianion. Hence, the family of <b>1Ln</b> features a dysprosocenium skeleton with extra two coordination of C<sup>−</sup> anions of carborllides. Such coordination geometry is more like a tetrahedron if abstracting the centroids of two coordinated Cp rings. In this cubic-type geometry, no significant magnetic axiality is presented; only <b>1Dy</b> and <b>1Tb</b> show field-induced slow magnetic relaxation behavior below 10 K. Inspired by <b>1Ln</b>, the free pentamethylcyclopentadienyl (Cp*<sup>−</sup>) and <i>nido</i>-dicarborllide ligands are used to sandwich central Dy<sup>3+</sup> ion, achieving heteroleptic complex <b>2Dy</b>. The bending angle by linking the centroid of Cp*<sup>−</sup>, Dy<sup>3+</sup> and C<sub>2</sub>B<sub>3</sub><sup>2−</sup> in <b>2Dy</b> is increased to 132.8(1)°. As such, the effective energy barrier for magnetic reversal (<i>U</i><sub>eff</sub>) and magnetic blocking temperature <i>T</i><sub>B</sub> (ZFC) are both increased (<i>U</i><sub>eff</sub> = 616(10) K; <i>T</i><sub>B</sub> = 6 K). The effort of further enhancing <i>U</i><sub>eff</sub> and <i>T</i><sub>B</sub> in such heteroleptic organolanthanide sandwiches should rely on keeping increasing the ligand axiality.</p>\u0000 <p>\u0000 </p>\u0000 </div>","PeriodicalId":151,"journal":{"name":"Chinese Journal of Chemistry","volume":"43 2","pages":"131-138"},"PeriodicalIF":5.5,"publicationDate":"2024-10-07","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142868132","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}
引用次数: 0
Bottlebrush Random Copolymers at Oil-Oil Interfaces 油-油界面的瓶刷无规共聚物
IF 5.5 1区 化学
Chinese Journal of Chemistry Pub Date : 2024-10-07 DOI: 10.1002/cjoc.202400703
Yaxin Wang, Yunhui Wen, Yuzheng Luo, Shuailong Li, Jiaqiu Luo, Shaowei Shi
{"title":"Bottlebrush Random Copolymers at Oil-Oil Interfaces","authors":"Yaxin Wang,&nbsp;Yunhui Wen,&nbsp;Yuzheng Luo,&nbsp;Shuailong Li,&nbsp;Jiaqiu Luo,&nbsp;Shaowei Shi","doi":"10.1002/cjoc.202400703","DOIUrl":"https://doi.org/10.1002/cjoc.202400703","url":null,"abstract":"<div>\u0000 \u0000 <p>Oil-in-oil nonaqueous emulsions are of great interest for developing emulsion-templated polymers and encapsulation systems that are incompatible with water-sensitive substances. Tailor-made amphiphilic block copolymers are by far the most efficient stabilizers for oil-in-oil emulsions while less attention is given to copolymers with more complex architectures. Here, we report the stabilization of DMSO-silicone oil interface by bottlebrush random copolymers (BRCPs) containing norbornene backbones with densely grafted poly(methyl methacrylate) (PMMA) and polystyrene (PS) side chains. The assembly kinetics of BRCPs at the DMSO-silicone oil interface can be divided into three processes, including diffusion, reconfiguration and reorganization, and can be varied by tuning the degree of polymerization of the backbone (<i>N</i><sub>B</sub>). Due to the high efficiency of BRCPs in reducing the interfacial tension, when using BRCPs as stabilizers, stable silicone oil-in-DMSO traditional emulsions and high internal phase emulsions (HIPEs) can be successfully obtained, while no stable emulsions can be achieved with linear PMMA-<i>b</i>-PS serving as the stabilizer. This study, for the first time, underscores the great potential of amphiphilic bottlebrush copolymers in preparing oil-in-oil emulsions. Given the advances in polymerization strategy, a broad variety of amphiphilic bottlebrush copolymers are expected to be synthesized and applied in the stabilization of nonaqueous biphasic systems.</p>\u0000 <p>\u0000 </p>\u0000 </div>","PeriodicalId":151,"journal":{"name":"Chinese Journal of Chemistry","volume":"43 2","pages":"139-145"},"PeriodicalIF":5.5,"publicationDate":"2024-10-07","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142868136","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}
引用次数: 0
A Cascade Reaction Triggered by H-H Steric Hindrance: Dimeric Covalent Organic Frameworks on Au(111) and Dimeric Nanoribbons on Ag(111) 由H-H位阻引发的级联反应:Au(111)上的二聚共价有机框架和Ag(111)上的二聚纳米带
IF 5.5 1区 化学
Chinese Journal of Chemistry Pub Date : 2024-10-07 DOI: 10.1002/cjoc.202400788
Boyu Fu, Jianchen Lu, Jianqun Geng, Yong Zhang, Wei Xiong, Gefei Niu, Yi Zhang, Lei Gao, Jinming Cai
{"title":"A Cascade Reaction Triggered by H-H Steric Hindrance: Dimeric Covalent Organic Frameworks on Au(111) and Dimeric Nanoribbons on Ag(111)","authors":"Boyu Fu,&nbsp;Jianchen Lu,&nbsp;Jianqun Geng,&nbsp;Yong Zhang,&nbsp;Wei Xiong,&nbsp;Gefei Niu,&nbsp;Yi Zhang,&nbsp;Lei Gao,&nbsp;Jinming Cai","doi":"10.1002/cjoc.202400788","DOIUrl":"https://doi.org/10.1002/cjoc.202400788","url":null,"abstract":"<div>\u0000 \u0000 <p>In on-surface synthesis, dimers are typically utilized to explore reaction mechanisms or as intermediates in the formation of final products. However, constructing the innovative nanostructures with dimers as building blocks remains challenging. Here, using non-planar 2,2′,7,7′-tetrabromo-9,9′-biflurenyliden molecules, we have successfully synthesized dimeric covalent organic frameworks (COFs) on the Au(111) surface through a temperature-controlled cascade reaction. Notably, the H-H steric hindrance within precursors caused by double bonds leads to selective stepwise debromination during the thermal annealing, which promotes the dimerization through intermolecular Ullmann coupling and cyclodehydrogenation reaction to form COFs primarily constituted by dimer building blocks. Combining scanning tunneling microscopy/spectroscopy and density functional theory calculations, we have precisely confirmed the structural evolution and reaction mechanism. Furthermore, by introducing Ag adatoms to form C−Ag−C intermediates, we have successfully regulated the reaction path and synthesized one-dimensional nanoribbons with dimers as building blocks. This work not only validates the strategy of synthesizing dimeric nanostructures on different surfaces through cascade reactions induced by precursor design, but also enriches the research field of surface synthesis of COFs and nanoribbons.</p>\u0000 <p>\u0000 </p>\u0000 </div>","PeriodicalId":151,"journal":{"name":"Chinese Journal of Chemistry","volume":"43 2","pages":"161-168"},"PeriodicalIF":5.5,"publicationDate":"2024-10-07","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142868131","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}
引用次数: 0
Energy-Saving Hydrogen Production from Methanol Electrocatalysis Catalyzed by Molybdenum Phosphide/Nitrogen-Doped Carbon Polyhedrons Supported Pt Nanoparticles 磷化钼/氮掺杂碳多面体负载Pt纳米颗粒催化甲醇电催化节能制氢
IF 5.5 1区 化学
Chinese Journal of Chemistry Pub Date : 2024-10-07 DOI: 10.1002/cjoc.202400523
Jiaojiao Li, Meng Li, Fulin Yang, Ligang Feng
{"title":"Energy-Saving Hydrogen Production from Methanol Electrocatalysis Catalyzed by Molybdenum Phosphide/Nitrogen-Doped Carbon Polyhedrons Supported Pt Nanoparticles","authors":"Jiaojiao Li,&nbsp;Meng Li,&nbsp;Fulin Yang,&nbsp;Ligang Feng","doi":"10.1002/cjoc.202400523","DOIUrl":"https://doi.org/10.1002/cjoc.202400523","url":null,"abstract":"<div>\u0000 \u0000 <p>Improving the catalytic efficiency and anti-poisoning ability of Pt-based catalysts is very critical in methanol electrolysis technology for high-purity hydrogen generation. Herein, the nitrogen-doped carbon polyhedrons-encapsulated MoP (MoP@NC) supported Pt nanoparticles were demonstrated to be effective for methanol electrolysis resulting from the combined advantages. The nitrogen-doped carbon polyhedrons not only greatly enhanced the conductivity but also effectively prevented the aggregation of MoP to offer Pt anchoring sites. The electronic structure modification of Pt from their interaction reduced the adsorption energy of CO*, resulting in good CO-poisoning resistance and accelerated reaction kinetics. Specifically, Pt-MoP@NC exhibited the highest peak current density of 106.4 mA·cm<sup>–2</sup> for methanol oxidation and a lower overpotential of 28 mV at 10 mA·cm<sup>–2</sup> for hydrogen evolution. Energy-saving hydrogen production from methanol electrolysis was demonstrated in the two-electrode systems assembled by Pt-MoP@NC which required a low cell voltage of 0.65 V to reach a kinetic current density of 10 mA·cm<sup>–2</sup> on the glass carbon system, about 1.02 V less than that of water electrolysis.</p>\u0000 <p>\u0000 </p>\u0000 </div>","PeriodicalId":151,"journal":{"name":"Chinese Journal of Chemistry","volume":"43 2","pages":"146-154"},"PeriodicalIF":5.5,"publicationDate":"2024-10-07","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142868129","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}
引用次数: 0
Evolution of the Short Enantioselective Total Synthesis of the Unique Marine Myxobacteria Polyketide Salimabromide 独特的海洋粘菌聚酮盐溴胺短对映选择性全合成的进化
IF 5.5 1区 化学
Chinese Journal of Chemistry Pub Date : 2024-10-02 DOI: 10.1002/cjoc.202400751
Kang-Ji Gan, Yao Zhu, Gaosheng Shi, Changhui Wu, Fu-Qiang Ni, Li-Han Zhao, Xiaowei Dou, Zhihan Zhang, Hai-Hua Lu
{"title":"Evolution of the Short Enantioselective Total Synthesis of the Unique Marine Myxobacteria Polyketide Salimabromide","authors":"Kang-Ji Gan,&nbsp;Yao Zhu,&nbsp;Gaosheng Shi,&nbsp;Changhui Wu,&nbsp;Fu-Qiang Ni,&nbsp;Li-Han Zhao,&nbsp;Xiaowei Dou,&nbsp;Zhihan Zhang,&nbsp;Hai-Hua Lu","doi":"10.1002/cjoc.202400751","DOIUrl":"https://doi.org/10.1002/cjoc.202400751","url":null,"abstract":"<div>\u0000 \u0000 <p>Salimabromide, a unique and scarce marine tetracyclic polyketide, was synthesized in both racemic and optically active forms. A novel carboxylic acid-directed method for tandem oxidative difunctionalization of olefins was developed, whereby the formation of bridged butyrolactone and enone moieties occurs concurrently. Density functional theory (DFT) calculations indicate that this reaction follows a [3+2] process rather than the [2+2] process. In the meantime, the distinctive benzo-fused [4.3.1] carbon skeleton and highly hindered vicinal quaternary stereocenters were simultaneously constructed through a challenging intramolecular Giese-Baran radical cyclization. Furthermore, deuterium kinetic isotopic effects were utilized to enhance the efficacy of this pivotal step. This represents a new illustration of the application of kinetic isotope effects in natural product synthesis. Then, the short asymmetric synthesis of (+)-salimabromide (13 or 15 steps) was accomplished by combing this method with rhodium-catalyzed enantioselective hydrogenation of a cycloheptenone derivative (97% ee) or conjugate addition of an aryl boronic acid with 2-cyclohepten-1-one (&gt; 99% ee).</p>\u0000 <p>\u0000 </p>\u0000 </div>","PeriodicalId":151,"journal":{"name":"Chinese Journal of Chemistry","volume":"43 1","pages":"79-89"},"PeriodicalIF":5.5,"publicationDate":"2024-10-02","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142762187","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}
引用次数: 0
Spin Crossover OFF/ON Triggered by Ligand Chemical Doping in an Fe(III) Solid Solution† Fe(III)固溶体中配体化学掺杂引发的自旋交叉开关
IF 5.5 1区 化学
Chinese Journal of Chemistry Pub Date : 2024-10-02 DOI: 10.1002/cjoc.202400859
Shuang Peng, Yue Gao, Zi-Yi Zhang, Guang-Yan Xu, Wen-Jun Zheng, Feng-Lei Yang, Jing-Wei Dai, Zhao-Yang Li
{"title":"Spin Crossover OFF/ON Triggered by Ligand Chemical Doping in an Fe(III) Solid Solution†","authors":"Shuang Peng,&nbsp;Yue Gao,&nbsp;Zi-Yi Zhang,&nbsp;Guang-Yan Xu,&nbsp;Wen-Jun Zheng,&nbsp;Feng-Lei Yang,&nbsp;Jing-Wei Dai,&nbsp;Zhao-Yang Li","doi":"10.1002/cjoc.202400859","DOIUrl":"https://doi.org/10.1002/cjoc.202400859","url":null,"abstract":"<div>\u0000 \u0000 <p>Spin crossover (SCO), characterized by distinct high-spin (HS) and low-spin (LS) states, has potential applications in memory, electronic, and electroluminescent devices. The OFF/ON switching of SCO is crucial for obtaining bistable magnetic properties. However, there are few strategies for achieving this switching. Herein, based on a ligand chemical doping strategy, we report an Fe(III) solid solution that can be prepared using a ligand chemical doping strategy, enabling not only the OFF/ON switching of SCO but also the fine-tuning of the spin transition temperature (<i>T</i><sub>c</sub>) within a 45 K range near room temperature. The experimental results show that when the polar ligand doping ratio reaches 20%, SCO behavior is triggered, and the crystal phase transforms significantly, becoming loose and flexible. Furthermore, <i>T</i><sub>c</sub> can be continuously regulated as the ligand-doping ratio increases. Density functional theory (DFT) calculations reveal that solid packing-induced molecular distortion blocks SCO, whereas loosely flexible packing triggers SCO via fluorinated ligand chemical doping.</p>\u0000 <p>\u0000 </p>\u0000 </div>","PeriodicalId":151,"journal":{"name":"Chinese Journal of Chemistry","volume":"43 1","pages":"90-96"},"PeriodicalIF":5.5,"publicationDate":"2024-10-02","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142762188","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}
引用次数: 0
Photocatalytic Aldehyde Allylation for Site-Specific DNA Functionalization 用于位点特异性DNA功能化的光催化醛烯丙化
IF 5.5 1区 化学
Chinese Journal of Chemistry Pub Date : 2024-10-02 DOI: 10.1002/cjoc.202400796
Yixin Zhang, Ying Huang, Qiaoling Che, Yiyun Chen
{"title":"Photocatalytic Aldehyde Allylation for Site-Specific DNA Functionalization","authors":"Yixin Zhang,&nbsp;Ying Huang,&nbsp;Qiaoling Che,&nbsp;Yiyun Chen","doi":"10.1002/cjoc.202400796","DOIUrl":"https://doi.org/10.1002/cjoc.202400796","url":null,"abstract":"<div>\u0000 \u0000 <p>Enhancing the DNA toolbox with innovative photochemical reactions is pivotal for advancing nucleic acid-based technologies. Aldehyde groups, versatile bioorthogonal handles for imine formation under acidic conditions, are particularly valuable due to their roles in nucleic acid epigenetics. Here, we present the first photocatalytic on-DNA aldehyde allylation, enabling precise DNA functionalization under mild, neutral aqueous conditions. Our approach utilizes a photocatalytic polarity-reversal reaction between DNA-conjugated benzaldehydes and allyl sulfones. This reaction demonstrates exceptional chemoselectivity while preserving DNA integrity. By varying allyl sulfones, we achieve site-specific labeling of non-native DNA with the aldehyde group and cross-linking with DNA-bearing allyl sulfones. Furthermore, our method facilitates selective labeling and pull-down enrichment of 5-formylpyrimidine nucleotides among complex cellular DNA. This photocatalytic on-DNA aldehyde transformation expands the limited bioorthogonal photochemical toolboxes, providing novel avenues for functionalizing both non-native and native aldehyde modifications on DNA.</p>\u0000 <p>\u0000 </p>\u0000 </div>","PeriodicalId":151,"journal":{"name":"Chinese Journal of Chemistry","volume":"43 1","pages":"97-103"},"PeriodicalIF":5.5,"publicationDate":"2024-10-02","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142762189","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}
引用次数: 0
Transition-Metal-Mediated Fluoroalkylation of Carbon Electrophiles through Cross-Electrophile Couplings 通过交叉亲电偶联实现过渡金属介导的碳亲电体氟烷基化反应
IF 5.5 1区 化学
Chinese Journal of Chemistry Pub Date : 2024-10-01 DOI: 10.1002/cjoc.202400672
Yun-Cheng Luo, Xingang Zhang
{"title":"Transition-Metal-Mediated Fluoroalkylation of Carbon Electrophiles through Cross-Electrophile Couplings","authors":"Yun-Cheng Luo,&nbsp;Xingang Zhang","doi":"10.1002/cjoc.202400672","DOIUrl":"https://doi.org/10.1002/cjoc.202400672","url":null,"abstract":"&lt;div&gt;\u0000 \u0000 \u0000 &lt;section&gt;\u0000 \u0000 &lt;p&gt;Organofluorine compounds have attracted substantial interest in life and materials sciences due to the unique properties of fluorine atom(s) that often change the physicochemical and biological properties of organic molecules. Transition-metal-mediated cross-electrophile coupling between carbon electrophiles and fluoroalkyl electrophiles has emerged as a straightforward and efficient route for the synthesis of a wide range of fluoroalkylated compounds because of its synthetic convenience without the tedious synthesis of organometallic reagents. Moreover, alkenes or alkynes-involved three-component cross-electrophile couplings provide rapid and effective access to carbonfunctionalized fluoroalkylated alkanes and alkenes. Herein, we comprehensively summarize the transition-metal-mediated reductive fluoroalkylation of diverse carbon electrophiles through a historical perspective, including trifluoromethylation, difluoroalkylation, monofluoroalkylation, and so on. Different transition metals (Cu, Ni, &lt;i&gt;etc&lt;/i&gt;.) and strategies are discussed, in which nickel-catalyzed reductive fluoroalkylation reactions represent an attractive and efficient synthetic route to site-selectively access organofluorine compounds.&lt;/p&gt;\u0000 \u0000 &lt;p&gt;\u0000 &lt;/p&gt;\u0000 &lt;/section&gt;\u0000 \u0000 &lt;section&gt;\u0000 \u0000 &lt;h3&gt; Key Scientists&lt;/h3&gt;\u0000 \u0000 &lt;p&gt;As early as 1965, McLoughlin and Thrower finished the first stoichiometric copper-mediated fluoroalkylation of aromatic iodides with fluoroalkyl iodides. However, excess aromatic iodides and elevated temperature were used for this method. In 1969, Kobayashi and Kumadaki reported studies on the copper-mediated trifluoromethylation of aromatic halides with excess trifluoromethyl iodide. After more than four decades, the Zhang group developed a nickel-catalyzed &lt;i&gt;β&lt;/i&gt;-fluorinated alkylation of (hetero)aryl iodides with fluoroalkylated secondary alkyl bromides in 2015, and a nickel-catalyzed difluoromethylation of (hetero)aryl chlorides with chlorodifluoromethane ClCF&lt;sub&gt;2&lt;/sub&gt;H in 2017. The Zhang group also developed enantioselective nickel-catalyzed reductive alkyl-arylation of 3,3,3-trifluoropropene with (hetero)aryl and tertiary alkyl iodides. In 2018, the MacMillan group developed a novel copper/photoredox dual catalytic system for the trifluoromethylation of aryl bromides or alkyl bromides with (&lt;i&gt;S&lt;/i&gt;)-(trifluoromethyl) dimesitylsulfonium triflate in the presence of tris-(trimethylsilyl) silanol. They also developed a nickel/photoredox catalyzed difluoromethylation of aryl bromides in the presence of silane. During this time, the Wang group reported a nickel-catalyzed monofluoroalkylation of aryl halides with monofluoroalkyl halides. From 2021 to 2023, the same group further developed a series of enantioselective nickel-catalyzed trifluoroalkylation of aryl, alkenyl, and acyl halides. ","PeriodicalId":151,"journal":{"name":"Chinese Journal of Chemistry","volume":"42 24","pages":"3499-3517"},"PeriodicalIF":5.5,"publicationDate":"2024-10-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142641234","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}
引用次数: 0
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