Article
Chemistry, Physical
Soojin Kwak, Jeongin Choi, Jimin Han, Sarah Yunmi Lee
Summary: This study presents a Lewis pair-catalyzed process for the selective addition of secondary phosphine oxides to allenoates. Mechanistic studies reveal that the deprotonation of a P-H bond of a SPO by a phosphonium zwitterion is the rate-determining step in the reaction. The reaction proceeds through a catalytic cycle to form alkenylphosphorus building blocks.
Review
Chemistry, Multidisciplinary
Qingde Zhuo, Xiaoxi Zhou, Takanori Shima, Zhaomin Hou
Summary: This review focuses on N-2 activation and addition to unsaturated substrates mediated by transition metal complexes, which resulted in various N-C bond formation products. The emphasis is on the reaction modes and mechanisms. It is hoped that this work will inspire further explorations in this challenging field.
ANGEWANDTE CHEMIE-INTERNATIONAL EDITION
(2023)
Article
Chemistry, Multidisciplinary
Mao Suzuki, Masahiro Terada, Itaru Nakamura
Summary: The [1,3]-nitrogen rearrangement reactions of O-aryl ketoximes were promoted by N-heterocyclic carbene (NHC)-copper catalysts and BF3 center dot OEt2 as an additive, affording ortho-aminophenol derivatives in good yields. The reaction of substrates with electron-withdrawing substituents on the phenol moiety are accelerated by adding silver salt and modifying the substituent at the nitrogen atom. Density functional theory calculations suggest that the rate-determining step of this reaction is the oxidative addition of the N-O bond of the substrate to the copper catalyst. The negative rho values of the substituent at both the oxime carbon and phenoxy group indicate that the donation of electrons by the oxygen and nitrogen atoms accelerates the oxidative addition.
Article
Chemistry, Multidisciplinary
Youxiang Jin, Lian-Feng Fan, Elvis Wang Hei Ng, Lu Yu, Hajime Hirao, Liu-Zhu Gong
Summary: The selective functionalization of C(sp(3))-H bonds is an important approach for streamlining synthetic routes. In this study, an atom transfer radical coupling (ATRC) strategy was adopted to achieve the asymmetric functionalization of hydrocarbons, resulting in the formation of valuable chiral lactones with high efficiency and excellent enantioselectivity.
JOURNAL OF THE AMERICAN CHEMICAL SOCIETY
(2023)
Article
Chemistry, Multidisciplinary
Yajun Zhang, Dandan Jiang, Zheng Fang, Ning Zhu, Naixian Sun, Wei He, Chengkou Liu, Lili Zhao, Kai Guo
Summary: Core modifications of dihydrophenazines and their analogues improve the efficiency and stability of organic photoredox catalysis, leading to more effective control of polymerization under simulated sunlight.
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, Organic
Meizhong Tang, Ye-Xin Wang, Shenlin Huang, Lan-Gui Xie
Summary: This article reports a method for the selective synthesis of α-sulfenylated α,β-unsaturated aldehydes from terminal alkynes using a suitable oxidant. The mild conditions of this method enable the conversion of a wide range of terminal alkynes, bearing various functionalities or derived from drug and bioactive molecules, to their α,β-unsaturated aldehyde analogues with excellent chemo-, regio-, and stereoselectivities.
ORGANIC CHEMISTRY FRONTIERS
(2023)
Article
Chemistry, Multidisciplinary
Ting Guan, Jing-Yu Guo, Qing-Hong Zhang, Xin-Wen Xu, Xiao-Yu Yu, Yu Zhang, Kai Zhao
Summary: A photoredox-catalyzed regio- and stereoselective Heck-type cyanoalkylation reaction was developed to incorporate synthetically versatile and pharmaceutically appealing distal cyanoalkyl moieties into enamide scaffolds under mild conditions. The methodology exhibited broad substrate scopes, satisfying functional group compatibilities, excellent regio- and stereoselectivities, and versatile synthetic applications of beta-cyanoalkylated enamides.
Article
Chemistry, Multidisciplinary
Liang Yi, Chen Zhu, Xiangyu Chen, Huifeng Yue, Tengfei Ji, Yiqiao Ma, Yuanyuan Cao, Rajesh Kancherla, Magnus Rueping
Summary: Hydrogen atom transfer (HAT) and photoredox dual catalysis provide a unique approach for the direct activation of C/Si/S-H bonds in organic synthesis. However, the activation of O-H bonds of beta,gamma-unsaturated oximes poses a challenge due to their high redox potential. In this study, the combination of HAT and photoredox catalysis successfully addresses this issue and offers a universal pathway for iminoxyl radical formation.
Article
Chemistry, Multidisciplinary
Maxime Boudjelel, Rene Riedel, Richard R. Schrock, Matthew P. Conley, Adam J. Berges, Veronica Carta
Summary: Exposure of a specific tungstacyclopentane complex to ethylene leads to the formation of propylene and a new tungstacyclobutane complex. The reaction can be explained by the formation of intermediate complexes, including a methyl-substituted tungstacyclobutane complex. These findings are important for understanding ethylene-involved olefin metathesis reactions.
JOURNAL OF THE AMERICAN CHEMICAL SOCIETY
(2022)
Article
Chemistry, Multidisciplinary
Dachang Bai, Fen Wu, Lingna Chang, Manman Wang, Hao Wu, Junbiao Chang
Summary: Here, we have developed an efficient method for the direct generation of difluoromethylated stereocenters through Ale-catalyzed regio- and enantioselective hydrosilylation of gem-difluoroalkenes. This method features readily available starting materials and commercial chiral catalysis, is applicable to a wide range of functional groups, and provides high yield and excellent enantioselectivity.
ANGEWANDTE CHEMIE-INTERNATIONAL EDITION
(2022)
Article
Chemistry, Multidisciplinary
Yixiu Ge, Zaozao Qiu, Zuowei Xie
Summary: A palladium-catalyzed selective tetrafunctionalization method for o-carborane derivatives has been developed, providing 3,6-dialkenyl-4,11-R-2-o-carboranes and 4,7-dialkenyl-5,11-R-2-o-carboranes in moderate to excellent yields. This study represents a new strategy for the selective synthesis of polyfunctionalized o-carborane derivatives in a one-pot process.
CHEMICAL COMMUNICATIONS
(2021)
Article
Chemistry, Multidisciplinary
Changseok Lee, Hyung-Joon Kang, Huiyeong Seo, Sungwoo Hong
Summary: This study reports a highly enantio- and regioselective Ni-catalyzed hydroamination of unactivated alkenes. It is applicable to common but unreactive alkenes and has a broad range of amine coupling partners, showing great potential for late-stage functionalization of complex molecules.
JOURNAL OF THE AMERICAN CHEMICAL SOCIETY
(2022)
Article
Chemistry, Organic
Huifang Lai, Jiexin Xu, Jin Lin, Biling Su, Daijun Zha
Summary: The Ritter-type reaction is an efficient tool for constructing amides, but the issue of chemical selectivity limits its efficiency and yield. We discovered that the inorganic salt hydrate MgSO4·2H2O can control chemical selectivity and overcome the shortcomings of other synthesis methods. It has a wide range of applications and significantly improves yield.
ORGANIC CHEMISTRY FRONTIERS
(2022)
Review
Chemistry, Multidisciplinary
Roman V. Ottenbacher, Anna A. Bryliakova, Vladimir I. Kurganskii, Petr V. Prikhodchenko, Alexander G. Medvedev, Konstantin P. Bryliakov
Summary: In recent years, metalloenzymes-mediated highly selective oxidations of organic substrates under mild conditions have inspired the development of synthetic bioinspired catalyst systems capable of conducting similar processes. Non-heme manganese complexes with certain ligands have proven to be the most effective in these reactions, showing the ability to mediate various chemo- and stereoselective oxidative transformations. Moreover, non-heme Mn based catalysts have become a major platform for studying oxidant activation mechanisms, selective oxygen transfer, and exploring catalytic regioselectivity trends in the oxidation of biologically active substrates.
CHEMISTRY-A EUROPEAN JOURNAL
(2023)
Article
Chemistry, Inorganic & Nuclear
Guojun Hu, Ziyue Deng, Yanwei Wang, Dan Yuan, Yong Zhang, Yingming Yao
Summary: A series of rare-earth metal complexes were synthesized and used as efficient initiators for the polymerization of trimethylene carbonate (TMC) and (L)-lactide ((L)-LA).
JOURNAL OF ORGANOMETALLIC CHEMISTRY
(2024)
Article
Chemistry, Inorganic & Nuclear
Van Ha Nguyen, John H. K. Yip
Summary: In this study, eight PtII-azulene complexes were synthesized to investigate the effect of metalation on the electronic structures, spectroscopy, and luminescence of organic chromophores. The results showed that the attachment of Pt substituents to azulene affected the HOMOs, LUMOs, and luminescence properties. The study provides insights into the role of metalation in modifying the properties of organic chromophores.
JOURNAL OF ORGANOMETALLIC CHEMISTRY
(2024)
Article
Chemistry, Inorganic & Nuclear
Moon Kedia, Virender Singh, Bhaskaran Shankar, Malaichamy Sathiyendiran
Summary: This study synthesized two types of neutral binuclear metallocycles using a one-pot solvothermal method and characterized their structures. The analysis revealed that these complexes adopt a binuclear heteroleptic cyclic architecture and belong to phosphine oxide donor (P=O)-based supramolecular coordination cyclic complexes.
JOURNAL OF ORGANOMETALLIC CHEMISTRY
(2024)
Article
Chemistry, Inorganic & Nuclear
Radhey S. Srivastava
Summary: This study demonstrates the effectiveness of zero-valent elements as reductants for the deoxydehydration reaction of polyols catalyzed by ONO-pincer ligated molybdenum dioxo. The insolubility and easy separability of the reductants and their oxidized products during the reaction are emphasized. Additionally, the choice of ligand has an impact on the catalytic performance of the reaction.
JOURNAL OF ORGANOMETALLIC CHEMISTRY
(2024)
Article
Chemistry, Inorganic & Nuclear
Hao Zhou, Yajun Sun, Li Deng, Weiran Yang, Yuehui Li
Summary: Efficient Ru-catalyzed hydrogenation of aldehydes was achieved using carbazole-derived phosphine ligands, with the crucial role of N-H moiety in promoting the catalytic reaction. The method was successfully applied in the Co/Ru-catalyzed hydroformylation process, resulting in the production of long-chain alcohols with excellent yields.
JOURNAL OF ORGANOMETALLIC CHEMISTRY
(2024)
Article
Chemistry, Inorganic & Nuclear
Theodor Danescu, Alexandru Lupan, Radu Silaghi-Dumitrescu, R. Bruce King
Summary: The structures and energies of complexes containing (Me2C2N2P)2Ru2(CO)n and (Me2C2N2P)2Fe2(CO)n have been studied. Low-energy structures are characterized by the presence of bridging diazaphospholyl rings, while higher-energy structures involve different ligand structures.
JOURNAL OF ORGANOMETALLIC CHEMISTRY
(2024)
Article
Chemistry, Inorganic & Nuclear
Savannah C. Kapper, Aamani Ponnekanti, Jonas Schaab, Tian-yi Li, Christine L. Chung, Gael Ung, Peter I. Djurovich, Mark E. Thompson
Summary: Organometallic iridium complexes with two cyclometalated ligands and one bis-oxazoline derived ancillary ligand were studied. These complexes have emission spanning across the visible and near-ultraviolet region, with moderate to high photoluminescence quantum yields. The (ppy)2Ir(BOX-CN) complexes were resolved into Delta- and Lambda-diastereomers based on solubility differences.
JOURNAL OF ORGANOMETALLIC CHEMISTRY
(2024)
Article
Chemistry, Inorganic & Nuclear
Zahra Karimi Sangari, Hossein Naeimi
Summary: In this research, a nanostructured CoCuFe2O4 catalyst was prepared using a brief and useful synthetic strategy. This catalyst was used for synthesizing 1,2,4,5-tetrasubstituted imidazole derivatives under ultrasonic irradiation. The approach offers advantages such as high efficiency, short reaction times, simplicity of the reaction medium, accelerated reaction rates, and easier separation and purification of products.
JOURNAL OF ORGANOMETALLIC CHEMISTRY
(2024)
Article
Chemistry, Inorganic & Nuclear
Rukhsana Gul, Wajid Munir, Ebraheem Abdu Musad Saleh, Shaukat Shujah, Muhammad Sirajuddin, Saira Tabassum, Khalil Ur Rehman, Dilfaraz Khan, Sameerah I. Al-Saeedi, Ehab A. Abdelrahman
Summary: Two new Schiff base ligands were synthesized and used to form copper, nickel, and cobalt complexes. The synthesized compounds were characterized and screened for various biological activities. The metal complexes showed better activities in antibacterial, antifungal, antidiabetic, and antioxidant assays.
JOURNAL OF ORGANOMETALLIC CHEMISTRY
(2024)
Review
Chemistry, Inorganic & Nuclear
Ahsan Nazir, Pengwei Huo, Ameena Tur Rasool
Summary: This review explores the potential of g-C3N4-based S-scheme heterojunctions in addressing environmental issues. It summarizes the mechanism and preparation techniques of S-scheme heterojunctions based on g-C3N4, and presents recent studies on their applications in pollutant removal, CO2 reduction, hydrogen production, and bacterial disinfection. The review concludes with an outlook on future challenges for g-C3N4-based S-scheme heterojunctions.
JOURNAL OF ORGANOMETALLIC CHEMISTRY
(2024)
Article
Chemistry, Inorganic & Nuclear
Francois Mazars, Koffi Senam Etse, Guillermo Zaragoza, Lionel Delaude
Summary: The activity of three Pd-PEPPSI catalyst precursors with N-heterocyclic carbene (NHC) ligands derived from caffeine and theophylline in Mizoroki-Heck reactions was tested. The results showed that the catalysts achieved high conversions and yields, especially in the presence of electron-withdrawing substituents.
JOURNAL OF ORGANOMETALLIC CHEMISTRY
(2024)
Article
Chemistry, Inorganic & Nuclear
Bo-Han Wu, Xue Zhou, Lin Liu, Zheng-Bo Han
Summary: Researching carbon dioxide removal from flue gas and natural gas is crucial. Metal-organic frameworks (MOFs) are commonly used in adsorption due to their high surface area, porosity, and chemical properties. An ultra-microporous MOF CPM-20(Co) with mixed ligand was synthesized using inexpensive ligands. The material exhibited high selectivities and low regenerative energy, making it a promising option for CO2 separation in industries.
JOURNAL OF ORGANOMETALLIC CHEMISTRY
(2024)