Article
Chemistry, Organic
Xiaoxiao Chu, Guoren Zhou, Maofu Pang, Hongwu Zhang
Summary: Here, an efficient method for the homogeneous manganese-catalysed transfer hydrogenation of N-heterocycles using ammonia-borane as a hydrogen source under mild reaction conditions is reported. The use of a PNP manganese pincer complex allows for good to excellent isolated yields. The reaction proceeds through the detection of 1,2-dihydroquinoline as an intermediate by NMR spectra analysis and deuterium labelling experiment.
EUROPEAN JOURNAL OF ORGANIC CHEMISTRY
(2023)
Article
Chemistry, Multidisciplinary
Laurynas Gausas, Bjarke S. Donslund, Steffan K. Kristensen, Troels Skrydstrup
Summary: Polyurethane (PU) is a commonly used thermoset plastic with complex structure, leading to challenges in recycling. The study shows that catalytic hydrogenation of PU materials using a manganese catalyst can effectively deconstruct PU into original monomer components for efficient recovery.
Article
Chemistry, Multidisciplinary
Niklas F. Both, Anke Spannenberg, Haijun Jiao, Kathrin Junge, Matthias Beller
Summary: The use of bis(NHC) manganese(I) complexes 3 as catalysts for the hydrogenation of esters was investigated. Various aromatic and aliphatic esters were successfully hydrogenated at mild temperatures and low catalyst loadings using complexes 3 with KHBEt3 as additive, highlighting the efficiency of the novel catalytic system. Additionally, the versatility of the developed catalytic system was demonstrated by the hydrogenation of other substrate classes like ketones, nitriles, N-heteroarenes, and alkenes.
ANGEWANDTE CHEMIE-INTERNATIONAL EDITION
(2023)
Article
Chemistry, Multidisciplinary
Illia Lenko, Alexander Mamontov, Carole Alayrac, Remi Legay, Bernhard Witulski
Summary: The research demonstrates the divergent Pd-catalyzed reaction cascades with various 1,3-diynamides, leading to different products depending on the presence or absence of TBAF. Furthermore, deuterium labeling experiments reveal the unique formation mechanism of the products.
ANGEWANDTE CHEMIE-INTERNATIONAL EDITION
(2021)
Article
Chemistry, Organic
Vitalii M. Asaula, Volodymyr V. Buryanov, Bohdan Y. Solod, Daryna M. Tryus, Olena O. Pariiska, Igor E. Kotenko, Yulian M. Volovenko, Dmitriy M. Volochnyuk, Sergey Ryabukhin, Sergey Kolotilov
Summary: A set of 20 composites were prepared by pyrolysis of Co2+ complexes with 1,10-phenanthroline, melamine and 1,2-diaminobenzene, which were tested as catalysts for the hydrogenation of quinolines. The yields of respective products ranged from 90-100% without a distinct factor controlling the yield. The three most active composites showed high yields in scale-up production of substituted quinolines.
EUROPEAN JOURNAL OF ORGANIC CHEMISTRY
(2021)
Article
Chemistry, Multidisciplinary
Chenguang Liu, Mingyang Wang, Shihan Liu, Yujie Wang, Yong Peng, Yu Lan, Qiang Liu
Summary: The article reports on the non-noble metal-catalyzed asymmetric hydrogenation of N-heteroaromatics, quinolines. A new chiral pincer manganese catalyst showed outstanding catalytic activity in the reaction, producing high yields and enantioselectivities. The precise regulation of enantioselectivity was ensured by a pi-pi interaction, achieving competitive turnover numbers with noble metal catalysts.
ANGEWANDTE CHEMIE-INTERNATIONAL EDITION
(2021)
Article
Chemistry, Physical
Thomas Vielhaber, Christian Heizinger, Christoph Topf
Summary: This study reports a simple catalytic method for the hydrogenation of quinolines using a tungsten precursor. The method is operationally simple and avoids the use of expensive and oxygen-sensitive phosphine ligands and auxiliary hydride reagents.
JOURNAL OF CATALYSIS
(2021)
Article
Chemistry, Multidisciplinary
Josep Mas-Rosello, Christopher J. Cope, Eric Tan, Benjamin Pinson, Alan Robinson, Tomas Smejkal, Nicolai Cramer
Summary: Cyclometalated cyclopentadienyl iridium(III) complexes are efficient catalysts in the hydrogenation of oximes, with alkoxy-substituted aryl ketimine ligands providing the best catalytic performance. The stable iridium C,N-chelation is crucial for the catalytic activity, and the hydrogenation system demonstrates high functional group compatibility.
ANGEWANDTE CHEMIE-INTERNATIONAL EDITION
(2021)
Article
Chemistry, Multidisciplinary
Viktoriia Zubar, Andreas T. Haedler, Markus Schuette, A. Stephen K. Hashmi, Thomas Schaub
Summary: This report discusses the promising method of utilizing plastic waste through chemical recycling, specifically hydrogenative depolymerization using a Mn pincer complex catalyst. The key to success lies in the combination of the catalyst with elevated temperatures and appropriate solvents to ensure sufficient solubility of the polymers. The process successfully depolymerizes a wide range of polyurethane samples, releasing polyetherols and diaminotoluene in high yields.
Review
Chemistry, Applied
Gabriele Lupidi, Alessandro Palmieri, Marino Petrini
Summary: N-Activated ketimines are characterized by electron-withdrawing groups linked to the nitrogen atom, enhancing the electrophilic character and allowing addition reactions with weak nucleophiles. The presence of oxygen atoms in these groups is crucial for asymmetric catalytic reactions. This review summarizes the literature on the synthesis of optically active alpha-substituted amino derivatives using open-chain N-activated ketimines.
ADVANCED SYNTHESIS & CATALYSIS
(2021)
Article
Chemistry, Multidisciplinary
Soumyadeep Chakrabortty, Katharina Konieczny, Felix J. de Zwart, Eduard. O. Bobylev, Eszter Barath, Sergey Tin, Bernd H. Mueller, Joost N. H. Reek, Bas de Bruin, Johannes G. de Vries
Summary: Researchers achieved enantioselective hydrogenation of cyclic enamides using an earth-abundant cobalt-bisphosphine catalyst. The catalytic system, CoCl2/(S,S)-Ph-BPE, reduced trisubstituted carbocyclic enamides to saturated amides with high activity and excellent enantioselectivity (up to 99%). The methodology can be extended to the synthesis of chiral amines by base hydrolysis of the hydrogenation products. Preliminary mechanistic investigations suggested a sigma-bond-metathesis pathway for the hydrogenation of the carbon-carbon double bond, involving a high spin cobalt (II) species.
ANGEWANDTE CHEMIE-INTERNATIONAL EDITION
(2023)
Article
Chemistry, Physical
Zhao-Ying Yang, Heng Luo, Ming Zhang, Xiao-Chen Wang
Summary: A novel method for the catalyzed hydroboration/hydrogenation cascade reduction of pyridines has been developed, particularly effective for 2,3-disubstituted pyridines, yielding piperidines with high cis selectivity. Mechanistic studies showed that the pyridine substrates and piperidine products acted as bases in cooperation with B(C6F5)(3) to split H-2. This method demonstrated broad functional group tolerance and applicability for the synthesis of biologically active molecules.
Article
Chemistry, Multidisciplinary
Jing Wang, Wenji Wang, Xiongyu Yang, Jingwen Liu, Haizhou Huang, Mingxin Chang
Summary: In this study, a practical homogeneous direct reductive amination (DRA) procedure using iridium catalysis was reported. The reaction conditions were mild and additive-free, allowing for the formation of structurally and functionally diverse amine products, including drugs and compounds from late-stage manipulation. DFT studies revealed that the reaction proceeds via an outer-sphere H-addition pathway with important roles played by pi-pi interactions and H-bonding.
SCIENCE CHINA-CHEMISTRY
(2023)
Article
Chemistry, Multidisciplinary
Anthony Vivien, Laurent Veyre, Raphael Mirgalet, Clement Camp, Chloe Thieuleux
Summary: The low temperature regioselective hydrosilylation of various alkenes with Mn-2(CO)(10) under UV irradiation is achieved with Mn loadings as low as 1 mol%, in the absence of additives and with excellent selectivity and yields. The generation of a manganese radical allows the anti-Markovnikov hydrosilylation products to be selectively obtained in yields up to 99%.
CHEMICAL COMMUNICATIONS
(2022)
Article
Chemistry, Physical
Tamara Jurado-Vazquez, Efren Rosaldo, Alma Arevalo, Juventino J. Garcia
Summary: This paper reports a homogeneous copper-based catalyst that can catalyze the hydrogenation reaction of levulinic acid under mild reaction conditions, with high yield and selectivity.
Review
Chemistry, Multidisciplinary
Yuanyuan Hu, Bingwei Zhou, Congyang Wang
ACCOUNTS OF CHEMICAL RESEARCH
(2018)
Review
Chemistry, Physical
Yuanyuan Hu, Congyang Wang
Article
Chemistry, Physical
Teng Jia, Congyang Wang
Article
Chemistry, Multidisciplinary
Yunhui Yang, Congyang Wang
CHEMISTRY-A EUROPEAN JOURNAL
(2019)
Article
Chemistry, Organic
Bing Jia, Yunhui Yang, Xiqing Jin, Guoliang Mao, Congyang Wang
Article
Chemistry, Organic
Shaukat Ali, Jiaqi Huo, Congyang Wang
Article
Chemistry, Multidisciplinary
Ting Liu, Yunhui Yang, Congyang Wang
ANGEWANDTE CHEMIE-INTERNATIONAL EDITION
(2020)
Article
Chemistry, Organic
Jiaqi Huo, Yunhui Yang, Congyang Wang
Summary: Researchers have developed a novel trio of Me2Zn/ AlCl3/AgOTf to establish manganese catalysis, enabling the [3 + 2] cyclization of ketones with isocyanates via inert C-H activation to access 3-alkylidene phthalimidines in a straightforward manner.
Article
Chemistry, Organic
Ting Liu, Congyang Wang
Summary: This article discusses manganese-catalyzed C-H addition to polar unsaturated bonds in transition-metal catalysis.
Article
Chemistry, Physical
Hao Liu, You-Feng Han, Zhong-Hua Gao, Chun-Lin Zhang, Congyang Wang, Song Ye
Summary: The cooperative N-heterocyclic carbene/nickel-catalyzed redox-neutral hydroacylation of 1,3-dienes with aldehydes in water was successfully achieved, providing synthetically useful compounds with high atom economy. This study demonstrated the compatibility of NHC catalysis with nickel catalysis and utilized water as the sole solvent, which is rarely reported in cooperative metal/organic catalytic systems.
Article
Chemistry, Multidisciplinary
Zelong Wang, Silin Chen, Chao Chen, Yunhui Yang, Congyang Wang
Summary: Earth-abundant transition metal catalysis has been developed as a viable substitute for noble transition metal catalysis in hydrogenation reactions. However, the hydrogenation of thioamides using earth-abundant transition metals has not been reported due to catalyst poisoning by sulfur-containing molecules. In this study, we successfully achieved manganese-catalyzed hydrogenative desulfurization of thioamides to amines or imines by employing MnBr(CO)(5) instead of commonly-used pincer-manganese catalysts, along with NEt3 and CuBr. This reaction demonstrated excellent selectivity in breaking the C=S bond of thioamides, unlike the only known Ru-catalyzed hydrogenation of thioamides, and it exhibited unprecedented chemo-selectivity towards vulnerable functional groups.
ANGEWANDTE CHEMIE-INTERNATIONAL EDITION
(2023)
Article
Chemistry, Multidisciplinary
Weiyang Bi, Yunhui Yang, Song Ye, Congyang Wang
Summary: The umpolung cross-coupling reaction of pyridine-2-carboxaldehydes and propargylic carbonates was successfully achieved for the first time through N-heterocyclic carbene/palladium cooperative catalysis. The judicious selection of the palladium catalyst, ligand, and N-heterocyclic carbene resulted in regioselective formation of propargylic ketones.
CHEMICAL COMMUNICATIONS
(2021)
Article
Chemistry, Organic
Lei Zhang, Yin Wang, Yunhui Yang, Ping Zhang, Congyang Wang
ORGANIC CHEMISTRY FRONTIERS
(2020)
Article
Chemistry, Multidisciplinary
Xiaoxu Yang, Congyang Wang
ANGEWANDTE CHEMIE-INTERNATIONAL EDITION
(2018)
Article
Chemistry, Multidisciplinary
Qian Wu, Yubo Cui, Guifeng Xia, Jinlong Yang, Shuming Du, Xinhong Xiong, Li Yang, Dong Xu, Xu Deng, Jiaxi Cui
Summary: Passive daytime radiative cooling (PDRC) technology, while promising for global spacing cooling, faces limitations in practical application due to reduced cooling effectiveness caused by wear and dirt contamination. Researchers have developed a renewable armor structure using fluorinated hollow glass microspheres to enhance the anti-fouling and cooling properties of PDRC coatings. The coatings exhibit high solar reflectance and thermal emittance, leading to significant temperature reduction below ambient temperature.
CHINESE CHEMICAL LETTERS
(2024)
Article
Chemistry, Multidisciplinary
Qiang Bei, Bei Zhang, Kaifeng Wang, Shiming Zhang, Guichuan Xing, Clement Cabanetos
Summary: The power conversion efficiency (PCE) of organic solar cells (OSCs) has reached 20% in recent years, thanks to the advantages of organic photoactive materials. Benzothiadiazole (BT) has attracted significant research attention as a building block of OSCs. OSCs based on BT structure have shown diversity, and the increasing PCE values indicate a promising future for OSCs. This review analyzes the progress made in the last decades, focusing on effective BT small-molecules and BT polymers for OSCs. The structure-property relationships, donor-acceptor matching criteria, and morphology control approaches are discussed. The remaining challenges and a personal perspective on the future advancement of OSCs are summarized.
CHINESE CHEMICAL LETTERS
(2024)
Article
Chemistry, Multidisciplinary
Rong He, Dandan Tang, Ningge Xu, Heng Liu, Kun Dou, Xuejun Zhou, Fabiao Yu
Summary: Nasopharyngeal carcinoma (NPC) is a common malignant tumor of the head and neck, with a high incidence in China and Southeast Asian countries. In this study, a novel near-infrared fluorescent probe, SNAFL-GSH, was designed and synthesized for the detection of glutathione (GSH). The probe showed selective detection of GSH and the ability to distinguish normal and cancer cells. It has great potential for application in the diagnosis and evaluation of NPC.
CHINESE CHEMICAL LETTERS
(2024)
Article
Chemistry, Multidisciplinary
Zhukang Guo, Baijiang Jin, Yile Fang, Lian Jin, Song Li, Yan Deng, Zhu Chen, Hui Chen, Yuanying Zhang, Rabia Usman, Nongyue He
Summary: This study isolated primary cells that can be stably passaged from spontaneous tumors of genetically engineered pancreatic ductal adenocarcinoma model mice and used an autonomously developed automated screening instrument for efficient nucleic acid aptamer screening. The obtained aptamers were affinity verified at the cellular level. The study also investigated the impact of cell growth environment difference on the recognition ability of aptamers and confirmed the targeting ability and drug loading ability of the aptamer.
CHINESE CHEMICAL LETTERS
(2024)
Article
Chemistry, Multidisciplinary
Zhongshan Yang, Qiqi Zhang, Hui Song, Xin Chen, Jiwei Cui, Yanhui Sun, Lequan Liu, Jinhua Ye
Summary: Methane chemistry is a significant area of research in catalysis. Converting methane into value-added chemicals is desirable but challenging due to its high C-H bonding energy and lack of pi bonding or unpaired electrons. Photocatalytic partial oxidation of methane to liquid oxygenates is a promising technology for achieving high efficiency and selectivity under mild conditions. The choice and activation of oxidants are crucial for its performance.
CHINESE CHEMICAL LETTERS
(2024)
Article
Chemistry, Multidisciplinary
Peng Shan, Jing Liao, Jiayi Li, Chengyan Wang, Jie Zhou, Linqiang Mei, Yunlu Dai, Qiang Wang, Wenyan Yin
Summary: This study reports an oral radioprotectant Gel@GYY that combines a gelatin-based hydrogel and a pH-responsive hydrogen sulfide donor. Gel@GYY has excellent adhesion and sustained release properties, allowing it to release H2S in the gastrointestinal tract and effectively scavenge free radicals induced by radiation. It also reduces inflammation and has biodegradable properties.
CHINESE CHEMICAL LETTERS
(2024)
Article
Chemistry, Multidisciplinary
Lu Liu, Ziyi Liu, Jingnan Cui, Guiling Ning, Weitao Gong
Summary: The development of new metal-free heterogeneous catalysts has been the subject of extensive research. In this study, a new Troger's base (TB)-derived porous organic polymer (POPs) was designed and prepared by integrating multifunctional monomers. The resulting polymer, which combines the advantages of pillar[5]arene macrocycle and TB moiety, exhibited enhanced catalytic performance in Knoevenagel condensation and CO2 conversion, serving as an effective metal-free catalyst. This work provides a new strategy for fabricating metal-free heterogeneous catalysts based on macrocyclic POPs.
CHINESE CHEMICAL LETTERS
(2024)
Article
Chemistry, Multidisciplinary
Leyong Zhou, Changyin Yang, Weitao Dou, Tongxia Jin, Haibo Yang, Lin Xu
Summary: This review summarizes the application of micro/nanofluidic techniques in constructing supramolecular assemblies of different scales, and highlights the advantages of these techniques over conventional synthesis methods. Furthermore, it emphasizes the potential of micro/nanofluidic systems in improving our understanding of supramolecular self-assembly processes.
CHINESE CHEMICAL LETTERS
(2024)
Article
Chemistry, Multidisciplinary
Yanchao Jin, Suixiaochen Chen, Peiwen Huang, Xiongjian Chen, Chun-Yan Lin, Li-Ping Li, Xiao Chen, Rui Ding, Jianxi Liu, Riyao Chen
Summary: In this study, magnesium and coconut shell carbon were used to disinfect water by adsorbing copper(II) and converting dissolved oxygen to hydrogen peroxide through Mg corrosion. The copper was enriched on the carbon surface and efficiently catalyzed the hydrogen peroxide to inactivate E.coli. The process showed promising disinfection performance both in laboratory experiments and real wastewater treatment.
CHINESE CHEMICAL LETTERS
(2024)
Article
Chemistry, Multidisciplinary
Haihong Lai, Zehong Chen, Hao Zhuo, Yijie Hu, Xuan Zhao, Jiwang Yi, Hongzhi Zheng, Ge Shi, Yifan Tong, Ling Meng, Xinwen Peng, Linxin Zhong
Summary: By altering the pyrolysis route of cellulose nanofiber, the structural defects of carbon aerogels can be reduced, leading to improved compressibility and stress retention, as well as higher stress sensor sensitivity and temperature coefficient.
CHINESE CHEMICAL LETTERS
(2024)
Article
Chemistry, Multidisciplinary
Lina Guo, Jinsong Ding, Wenhu Zhou
Summary: Bacteria-based tumor therapy has resurfaced due to the revolution of tumor immunotherapy, offering unique solutions for traditional tumor treatments. Bacteria with active tropism can selectively colonize tumor sites and suppress tumor growth through various mechanisms, making them attractive tools for tumor treatment. This critical review introduces recent advances in bacteria-based tumor therapy, including bacterial properties, their benefits for tumor therapy, anti-tumor mechanisms, challenges, and future perspectives.
CHINESE CHEMICAL LETTERS
(2024)
Article
Chemistry, Multidisciplinary
Lan Liang, Chuanbin Wang, Xukai Lu, Yunan Sun, Beibei Yan, Ning Li, Guanyi Chen, Li'an Hou
Summary: This study investigates the interactions between phenol and benzaldehyde in the ECH process through experiments and theoretical calculations. The results show that phenol can accelerate the conversion of benzaldehyde, while benzaldehyde inhibits the conversion of phenol. The research provides a theoretical basis for the application of ECH in practical bio-oil upgrading.
CHINESE CHEMICAL LETTERS
(2024)
Article
Chemistry, Multidisciplinary
Pengcheng Fan, Yuhao He, Junan Pan, Ning Sun, Qiyu Zhang, Chen Gu, Kang Chen, Weinan Yin, Longlu Wang
Summary: This study focuses on the recent progress in hydrogen evolution reaction (HER) based on photothermal effect. It introduces the main pathways of photothermal conversions applied in H2 evolution, summarizes the functions of the photothermal effect, and presents a method to improve the catalytic system through thermal means. The study also discusses the challenges and outlook in this promising area.
CHINESE CHEMICAL LETTERS
(2024)
Article
Chemistry, Multidisciplinary
Leiduo Lai, Hongyu Zhou, Yichen Hong, Mengfan Luo, Yang Shi, Heng Zhang, Zhaokun Xiong, Gang Yao, Bo Lai
Summary: In this study, a facile ammonia reduction strategy was proposed and a novel FeVO3-x catalyst was synthesized for the activation of peroxymonosulfate (PMS) to degrade the pharmaceutical carbamazepine (CBZ). The results showed that the system could rapidly degrade CBZ and generate various active species involved in the degradation process.
CHINESE CHEMICAL LETTERS
(2024)
Article
Chemistry, Multidisciplinary
Tangxin Xiao, Xiuxiu Li, Liangliang Zhang, Kai Diao, Zheng-Yi Li, Xiao-Qiang Sun, Leyong Wang
Summary: This study presents the construction of a supramolecular light harvesting system based on sequential energy transfer. The system demonstrates tunable fluorescence emission through self-assembly of polymers into nanoparticles, achieving efficient two-step light harvesting.
CHINESE CHEMICAL LETTERS
(2024)
