Article
Chemistry, Organic
Nidhi Mishra, Sumit K. Singh, Anoop S. Singh, Anand K. Agrahari, Vinod K. Tiwari
Summary: Glycosyl triazoles are efficient ligands for Cu-catalyzed Sonogashira reaction, overcoming challenges of sideways homocoupling reactions. High product yields can be achieved at 130 degrees C for various substrates, showing versatility of this catalytic system.
JOURNAL OF ORGANIC CHEMISTRY
(2021)
Article
Chemistry, Multidisciplinary
Long Zheng, Xueying Guo, Ying-Chao Li, Yichen Wu, Xiao-Song Xue, Peng Wang
Summary: In this study, the coupling of alkynes with Fischer-type copper carbene species bearing an alpha-siloxyl group is reported. The copper carbene species can be in situ generated from acylsilanes under photoirradiation and redox-neutral conditions. The side-arm modified bisoxazoline (SaBox) ligands play a crucial role in this coupling reaction, providing the corresponding alkynyl alcohol in high yields with remarkable heterocycle tolerance and broad substrate scope.
ANGEWANDTE CHEMIE-INTERNATIONAL EDITION
(2023)
Article
Chemistry, Physical
Stefan Weber, Luis F. Veiros, Karl Kirchner
Summary: Efficient manganese-catalyzed dimerization of terminal alkynes to produce 1,3-enynes is achieved in this study. The reaction is atom economic, utilizing an inexpensive catalyst with high efficiency and selectivity.
Article
Chemistry, Multidisciplinary
Gabor Gyorke, Andras Dancso, Balazs Volk, David Hunyadi, Imre Szaloki, Matyas Milen
Summary: Copper, one of the most abundant metals, is widely used as a catalyst in organic chemistry. By utilizing naturally occurring ores, a more economical and environmentally friendly method for the production of diynes can be achieved.
Article
Chemistry, Physical
Lea T. Brechmann, Benyapa Kaewmee, Johannes F. Teichert
Summary: A simple copper(I)-N-heterocyclic carbene complex enables a H-2 mediated C-C coupling reaction of internal alkynes and allylic chlorides with high selectivity. This catalytic protocol utilizes copper hydride catalysis with H-2 as the reducing agent, avoiding the need for stoichiometric organometallic reducing agents.
Article
Chemistry, Multidisciplinary
Guolin Wu, Yuan Yao, Gen Li, Xue Zhang, Hui Qian, Shengming Ma
Summary: This study developed a catalytic recipe of copper halides to address the issues of side reactions and selectivity in the 1,5-H transfer of alka-1,4-diyn-3-yl amines, providing various allenynes with excellent enantioselectivities. The method was successfully applied to the first highly enantioselective total synthesis of the natural product scorodonin. Mechanistic studies and DFT calculations elucidated the regioselectivity for the observed 1,5-H transfer.
ANGEWANDTE CHEMIE-INTERNATIONAL EDITION
(2022)
Article
Chemistry, Multidisciplinary
Jia Li, Shaozhong Ge
Summary: A copper-catalyzed quadruple borylation reaction of terminal alkynes has been developed, providing a straightforward and economical method for preparing sp(3)-tetra-organometallic reagents from readily accessible alkynes.
ANGEWANDTE CHEMIE-INTERNATIONAL EDITION
(2022)
Article
Chemistry, Physical
Feng Wang, Yuecong Guo, Yutong Zhang, Pingping Tang
Summary: The silver-catalyzed dibromotrifluoromethoxylation of terminal alkynes reported provides 1,1-dibromo-2-(trifluoromethoxy)alkenes in good yields and high regioselectivity under mild reaction conditions. The reaction has a broad substrate scope and can be used for late-stage trifluoromethoxylation of complex small molecules. The products can be further modified, offering a convenient method for synthesizing compounds containing the OCF3 group.
Article
Chemistry, Organic
Xia Chen, Xiao-Yu Zhou
Summary: A convenient, efficient, and inexpensive palladium-free catalytic system using (PPh3)(2)CuBH4 as catalyst has been developed to catalyze Sonogashira cross-coupling of o-iodoanilines with terminal alkynes under an air atmosphere, resulting in a range of 2-ethynylaniline derivatives with up to 99% yield. This protocol is scalable, and notable features include good functional group tolerance, air atmosphere, and excellent yields.
SYNTHESIS-STUTTGART
(2023)
Article
Chemistry, Physical
Qiang Huang, Yu-Xuan Su, Wei Sun, Meng-Yang Hu, Wei-Na Wang, Shou-Fei Zhu
Summary: In this study, an operationally simple and mild iron-catalyzed alkylzincation method for terminal alkynes was developed, which can efficiently produce diverse alkenylzinc compounds with high selectivity. The method demonstrates a high anti-Markovnikov selectivity and high cis stereoselectivity, making it a competitive alternative for the selective synthesis of trisubstituted olefins.
Article
Chemistry, Multidisciplinary
Xiao-Yang Dong, Tian-Ya Zhan, Sheng-Peng Jiang, Xiao-Dong Liu, Liu Ye, Zhong-Liang Li, Qiang-Shuai Gu, Xin-Yuan Liu
Summary: A copper-catalyzed asymmetric radical 1,4-carboalkynylation of 1,3-enynes has been reported, providing diverse synthetically challenging tetrasubstituted chiral allenes. The use of a chiral N,N,P-ligand is crucial for both reaction initiation and enantiocontrol over the highly reactive allenyl radicals. The reaction shows broad substrate scope and excellent functional group tolerance.
ANGEWANDTE CHEMIE-INTERNATIONAL EDITION
(2021)
Article
Biochemistry & Molecular Biology
Aleksandra Blocka, Wojciech Chaladaj
Summary: We report a new method for the synthesis of highly substituted vinylidenecyclopentanes with good yields, complete selectivity, and excellent functional group tolerance. The mechanism involves the oxidative addition of bromoarene to Pd(0), followed by cyclization and reductive elimination. The high regio- and stereoselectivity can be attributed to the 5-exo-dig intramolecular addition of the enol form of the substrate to alkyne activated by the pi-acidic Pd(II) center.
Article
Chemistry, Multidisciplinary
Francesco Ferlin, Daniele Sciosci, Federica Valentini, Janet Menzio, Giancarlo Cravotto, Katia Martina, Luigi Vaccaro
Summary: This study presents a waste-minimized protocol for Sonogashira cross-coupling using a CPME/water azeotropic mixture and a heterogeneous hybrid palladium catalyst supported onto a silica/beta-cyclodextrin matrix. Key features include the crucial utilization of the aq CPME azeotrope, downstream liquid/liquid separation for continuous recovery and reuse of CPME fraction, and a comprehensive analysis highlighting the chemical and environmental efficiency of the protocol.
Article
Chemistry, Organic
Qile Wang, Thomas R. Hoye
Summary: The study presents a novel Cu(I)-catalyzed reaction for introducing different substituents onto benzyne molecules, showing potential for various applications.
Article
Chemistry, Organic
Fedor Kliuev, Anton Kuznetsov, Oleg I. Afanasyev, Sofiya A. Runikhina, Ekaterina Kuchuk, Evgeniya Podyacheva, Alexey A. Tsygankov, Denis Chusov
Summary: NaH2PO2 has been found to be an effective reducing agent in promoting reductive amination. It possesses characteristics of being nontoxic, stable, environmentally friendly, and readily available in large quantities, making it a potential competitor to classical reductants used in the target process. A low E factor of 1 was achieved for the substrate scope. Various carbonyl compounds reacted with amines under the developed conditions, demonstrating compatibility with a wide range of functional groups. The reaction conditions were successfully scaled up to 200-fold.
Article
Chemistry, Inorganic & Nuclear
Yuanyu Yang, Yao Guo, Bingbing Zhang, Ting Wang, Yi-Gang Chen, Xiaohui Hao, Xiaoxiu Yu, Xian-Ming Zhang
Summary: The study successfully obtained two new lead tellurite crystals, BaPbTe2O6 and PbVTeO5F, through a hydrothermal synthesis strategy. BaPbTe2O6 shows a great second-harmonic-generation (SHG) effect and a large optical birefringence, while PbVTeO5F demonstrates a remarkably larger birefringence. The functional orientations of active building units offer a practical insight into the design of desired optical functional materials.
INORGANIC CHEMISTRY
(2022)
Article
Chemistry, Multidisciplinary
Jin-Ping Gao, Zhikai Qi, Fu-Qiang Zhang, Xian-Ming Zhang
Summary: A thiolate-protected silver nanocluster was synthesized using a polyoxometalate template method, providing a new approach for developing high-nuclearity metal nanoclusters with various structures.
Article
Materials Science, Multidisciplinary
Guojun Zhou, Jialiang Ding, Xingxing Jiang, Jian Zhang, Maxim S. Molokeev, Qiqiong Ren, Jun Zhou, Shili Li, Xian-Ming Zhang
Summary: This study designs and synthesizes lead-free Mn2+-based halides with different coordination environments, and explores their potential applications in white LEDs through the investigation of their luminescence mechanism.
JOURNAL OF MATERIALS CHEMISTRY C
(2022)
Article
Chemistry, Inorganic & Nuclear
Xiu-Juan Tian, You-Zhu Yu, Qian Lu, Xian-Ming Zhang
Summary: High-valence tin-oxo clusters have structural diversity and potential applications. The synthesis of these clusters is challenging, but this study successfully synthesized various organic-inorganic hybrid tin-oxo clusters and explored the relationship between structure and properties.
INORGANIC CHEMISTRY
(2022)
Article
Chemistry, Physical
Shaohui Guo, Jie Su, Hui Luo, Xiaochuan Duan, Qianqian Shen, Jinbo Xue, Bingqing Wei, Xian-Ming Zhang
Summary: The sun-driven photocatalytic hydrogen production reaction provides possibilities for renewable energy systems, and proper introduction of physical fields can improve the mass flow and energy flow process. A piezo-enhanced photocatalytic system based on ultrasound field is proposed to realize adjustable built-in electric field for better transfer of photo-induced carriers. By preparing a piezo-photocatalyst through hydrothermal method and enhancing mass transfer dynamics through spatial compression and cavitation effect of the ultrasonic field, an impressive hydrogen production rate of up to 13.09 mmol h-1 g-1 is achieved with a ternary catalyst. A practical demonstration proves the advantages of the piezo-photocatalytic system.
Article
Chemistry, Multidisciplinary
Jiantao Yuan, Guojun Zhou, Jian Zhang, Xian-Ming Zhang
Summary: In this study, a series of distinctive cadmium halides with pi-conjugated ligands and halogen substitution were synthesized, and single-component ultra-broadband white-light emission was achieved with a high color rendering index. This work reveals a unique synergetic model for implementing white-light emission and can be applied to the design of high-performance hybrid emitters.
MATERIALS CHEMISTRY FRONTIERS
(2023)
Article
Chemistry, Multidisciplinary
Yu-Xin Wang, Jian Zhang, Hai-Feng Su, Xiaoqin Cui, Cai-Yun Wei, Huan Li, Xian-Ming Zhang
Summary: Photochemical methods are used for controllable synthesis of silver nanoparticles with specific sizes and shapes. This work presents the synthesis of an atomically precise Ag nanocluster (NC), [Ag-25(4-MePhC C)(20)(Dpppe)(3)](SbF6)(3) (Ag-25), through a process mediated by visible light. The total structure of Ag-25 is determined by X-ray crystallography. The formation of Ag-25 is triggered by a photoinduced electron-transfer (PET) process. The study also introduces a facile amine visual detection method based on the photochromatic process of Ag-19. Rating: 9/10.
Article
Chemistry, Inorganic & Nuclear
Shi-Li Li, Kang-Jing Li, Yuan Shen, Yu-Jie Wang, Wen Yang, Mei Qu, Zhikai Qi, Jian Zhang, Xian-Ming Zhang
Summary: Cadmium-viologen complexes with one-dimensional chained structures, using N,N'-4,4'-bipyridiniodi-propionate (CV) as functional sensitive structural units and cadmium as heavy atoms, have been constructed and show a remarkable and selective photochromic response to low-dose X-ray radiation.
INORGANIC CHEMISTRY
(2023)
Article
Chemistry, Physical
Xudong Hou, Xuguang Liu, Huan Wang, Xianming Zhang, Jiadong Zhou, Meiling Wang
Summary: This paper summarizes the application of Spinel LiMn2O4 cathodes in lithium-ion batteries, highlighting its advantages and limitations. The intrinsic capacity fading mechanisms, such as Jahn-Taller distortion, Mn disproportionation, and Mn migration, are discussed. Strategies to suppress these mechanisms and future research directions are also presented.
ENERGY STORAGE MATERIALS
(2023)
Article
Chemistry, Multidisciplinary
Yang Yang, Lijia Liu, Shuai Chen, Wenjun Yan, Haiqing Zhou, Xian-Ming Zhang, Xiujun Fan
Summary: Efficient and stable hydrogen evolution reaction (HER) catalysts were synthesized using a hydrothermal reaction and nitridation process. These catalysts exhibit a distinctive interface structure and appropriate electronic structure, leading to excellent HER performance in pH-universal electrolytes.
ANGEWANDTE CHEMIE-INTERNATIONAL EDITION
(2023)
Article
Chemistry, Physical
Zhuo Chen, Yueyue He, Yue Zhang, Xian-Ming Zhang, Dongying Fu
Summary: Researchers have discovered a new polar DJ hybrid perovskite that achieves broadband photoresponses through light-induced pyroelectricity. A single crystal photodetector based on this material demonstrates fast response times and high detectivity, with a significant contrast between photopyroelectric current and photocurrent signals. Additionally, the material exhibits reversible thermochromism.
CHEMISTRY OF MATERIALS
(2023)
Article
Chemistry, Multidisciplinary
Xiao-Lu Wang, Ke-Yu Niu, Feng-Fan Yang, Jun-Hao Wang, Linfeng Liang, Xian-Ming Zhang
Summary: Different guest molecules were embedded in hydrogen bonded 4-aminobenzenesulfonic acid layers, and their huge difference in proton conduction performance was investigated. Layer separation induced by dimethyl sulfoxide (DMSO) molecules plays an important role in the super proton conductivity of HOL-DMSO, which is as high as 2.21 x 10(-2) S cm(-1) at 100 °C under anhydrous conditions.
CRYSTAL GROWTH & DESIGN
(2023)
Article
Chemistry, Multidisciplinary
Yuanyu Yang, Yan Xiao, Bingxuan Li, Yi-Gang Chen, Penghui Guo, Bingbing Zhang, Xian-Ming Zhang
Summary: In this study, a special lattice substitution strategy was adopted to successfully synthesize a nonlinear optical silicate crystal, which overcomes the poor nonlinear properties of silicate materials and provides a new direction for the rational control of material structures and properties.
JOURNAL OF THE AMERICAN CHEMICAL SOCIETY
(2023)
Article
Chemistry, Multidisciplinary
Jian-Qiang Shen, Ying-Li Song, Chun-Ting He, Chen Zhang, Xing Lu, Zhikai Qi, Yunfeng Lu, Xian-Ming Zhang
Summary: The development of new and efficient non-precious metal-based single lithium-ion conductors is crucial for lithium metal batteries. Inspired by biologic proton chains, researchers have designed pseudo single lithium-ion conductors (PSLICs) by immobilizing liquid electrolytes in a unique Zr-carboxylate framework. These PSLICs contain biomimetic lithium ion chains and exhibit high lithium ionic conductivity and low activation energy. Experimental and theoretical studies have shown that lithium ions can be transported within PSLICs. LiFePO4|Li cells with PSLICs have shown extended cycling life, capacity retention, and improved Coulombic efficiency.
MATERIALS CHEMISTRY FRONTIERS
(2023)
Article
Chemistry, Physical
Dongying Fu, Zhuo Chen, Yunzhen Chang, Xian-Ming Zhang
Summary: Polar two-dimensional multilayered hybrid perovskites have shown great potential as self-driven photodetection materials. However, the current market is dominated by a different type of hybrid perovskites. By constructing a broadband self-driven photodetection system using Dion-Jacobson hybrid perovskites, the limitations of external circuits can be overcome. In this study, two new polar Dion-Jacobson hybrid perovskites were developed, which exhibited high-efficiency broadband self-driven photodetection and reversible thermochromic transformation.
CHEMISTRY OF MATERIALS
(2023)