Article
Chemistry, Multidisciplinary
Lei-Yang Zhang, Nai-Xing Wang, Zhan Yan, Yue-Hua Wu, Xue-Wang Gao, Ke Feng, Dumitra Lucan, Yalan Xing
Summary: An environmentally friendly method for the oxidative coupling of alpha-methyl substituted N-heteroarenes with indoles is reported. This method features simple operation and a wide range of substrates.
CHEMISTRY-A EUROPEAN JOURNAL
(2023)
Article
Multidisciplinary Sciences
Jianming Liu, Xiaopei Wang, Zhiyue Wang, Yan Yang, Qinghu Tang, Hongchi Liu, Hanmin Huang
Summary: A copper-catalyzed, aerobic oxidative C-H/C-H cyclization reaction was developed for the cleavage of C-H and N-H bonds in 3-phenylindoles. The reaction showed good tolerance to a variety of 3-phenylindoles and provided high yields of indole-containing polycyclic aromatic hydrocarbons (PAH). The isolation of di- and tri-indole intermediates allowed for an evaluation of the reaction mechanism, highlighting the role of the substrate as a catalyst. Mechanistic studies revealed that the substrate accelerates the reaction by transforming the less active di-indole intermediate into a tri-indole intermediate.
Article
Chemistry, Physical
Shidheshwar B. Ankade, Pragnya Paramita Samal, Vineeta Soni, Rajesh G. Gonnade, Sailaja Krishnamurty, Benudhar Punji
Summary: The intramolecular oxidative cyclization of indoles via nickel-catalyzed C(sp(2))-H/C(sp(3))-H and C(sp(2))-H/C(sp(2))-H couplings provides access to biologically relevant five- and six-membered substituted cyclopentaindolones, carbazolones, and indenoindolones in high yields. The mechanism involves a Ni(II)/Ni(III) pathway without the participation of a carbon-based radical.
Article
Chemistry, Multidisciplinary
Qiao-Lin Wang, Huawen Huang, Zhaozhao Sun, Yufeng Chen, Guo-Jun Deng
Summary: A new oxidative coupling reaction was achieved using visible-light-induced photocatalysis, providing a sustainable alternative to Minisci benzylation reactions. The combination of photocatalysis, bromo radical mediation, and aerobic oxidation proved to be essential for the success of the transformation. Mechanistic studies showed the feasibility of both oxidative and reductive quenching of the excited photocatalyst in the initial step.
Article
Chemistry, Organic
Xinmou Wang, Xiwei Xun, Hongjian Song, Yuxiu Liu, Qingmin Wang
Summary: Here, we report a two-step method for the construction of biaryl motifs by combining palladium catalysis and photocatalysis. This mild, dual-catalysis method showed good functional group tolerance and a wide substrate scope, making it suitable for the synthesis of 2-arylindole derivatives and late-stage functionalization of oligopeptides, drugs, and natural products.
Article
Chemistry, Organic
Aki Takeda, Hayaki Okai, Kyoji Watabe, Hiroki Iida
Summary: In this study, the oxidative cross-dehydrogenative coupling reaction between amidines and chalcones catalyzed by flavin and iodine was demonstrated. The riboflavin-iodine catalytic system played multiple roles in substrate and O-2 activation, enabling the facile and atom-economical synthesis of tetra substituted imidazoles in good yields (60-87%). This metal-free reaction consumed only 1 equiv of molecular oxygen and generated 2 equiv of environmentally benign H2O as the only byproduct.
JOURNAL OF ORGANIC CHEMISTRY
(2022)
Article
Chemistry, Organic
Xin-Wei Guo, Li-Xia Quan, Xian-Hong Zhu, Fa-Yun Chen, An-Xi Zhou, Liu-Liang Mao, Jie-Ping Wan, Shang-Dong Yang
Summary: The aluminum(iii) triflate catalyzed three-component coupling reaction allows for the synthesis of phosphoryl quinoline derivatives in a simple system without the need for transition metals, ligands, or additives, making it suitable for the rapid preparation of a variety of new potential N-P bidentate ligands.
ORGANIC & BIOMOLECULAR CHEMISTRY
(2022)
Article
Chemistry, Organic
Yang Liao, Yi Zhou, Zhen Zhang, Junzhen Fan, Feng Liu, Zhangjie Shi
Summary: The study presents a new Pd-catalyzed intramolecular oxidative coupling method for constructing C-C bonds between inert C-H bonds. This chemistry has the capability to build fused cyclic structures from linear substrates and synthesize privileged cyclic scaffolds.
Article
Chemistry, Organic
Biao Guo, Jiaying Lv, Le Lu, Ruimao Hua
Summary: A novel method for constructing the cyclopenta[c]quinoline ring has been developed, which involves the cyclization of 3-bromoindoles with internal alkynes in the presence of palladium. The mechanism of the formation of the cyclopenta[c]quinoline ring is proposed to proceed via a double [1,5] carbonsigmatropic rearrangement of the spirocyclic cyclopentadiene intermediate, generated from the cyclization of 3-bromoindoles with internal alkynes. This study also presents a new ring-expansion reaction of the pyrrole ring to pyridine via one carbon insertion into the C2-C3 bond of indoles, providing a simple and distinct route for constructing tricyclic fused-quinoline derivatives.
JOURNAL OF ORGANIC CHEMISTRY
(2023)
Article
Chemistry, Organic
Canlin Zou, Hongting Wu, Jiangtao He, Yunfei Hu, Weijie Deng, Xinling Li, Jinhui Hu, Yibiao Li, Yubing Huang
Summary: An efficient anodic C(sp(3))-H acyloxylation protocol has been developed, which enables the direct oxidation of indolin-3-ones to obtain various C2-acyloxy indolin-3-ones without the need for metal catalysts and external oxidants. The practicality of this protocol has been demonstrated through the effective application of several medical drugs and gram-scale experiments.
JOURNAL OF ORGANIC CHEMISTRY
(2022)
Article
Chemistry, Applied
Limei Wang, Daxue Du, Biao Zhang, Shunji Xie, Qinghong Zhang, Haiyan Wang, Ye Wang
Summary: A tantalum-based semiconductor photocatalyst has been developed for the direct photocatalytic coupling of methanol to ethylene glycol (EG). This catalyst shows high activity, selectivity, and excellent stability, making it an environmentally friendly and reliable candidate for this reaction.
CHINESE JOURNAL OF CATALYSIS
(2021)
Article
Chemistry, Organic
Leiqing Fu, Yunyun Liu, Jie-Ping Wan
Summary: The study reported the synthesis of NH-free pyrroles via Pd-catalyzed annulation of enaminones and alkenes, activating multiple C-H bonds and producing a variety of products, with the interesting observation of hydrogen gas evolution during the reactions.
Article
Chemistry, Organic
Dong-Yang Han, Xiao-Peng Liu, Ruo-Pu Li, Da-Zhen Xu
Summary: A highly efficient strategy has been developed for the direct thiolation of phenols under transition metal-free and solvent-free conditions. The reactions are operationally simple and employ air as an ideal oxidant, providing mono- and dithiolation products in good to excellent yields under basic conditions. This method tolerates a broad range of aryl thiols and arenes, making it especially applicable for large-scale synthesis.
JOURNAL OF ORGANIC CHEMISTRY
(2021)
Article
Chemistry, Physical
Ke Wang, Jiangbo Lu, Ying Lu, Cher Hon Lau, Ying Zheng, Xianfeng Fan
Summary: In this study, CO2 photocatalytic reduction with H2O on oxygen-deficient Au/TiO2-x under UV or visible light was investigated. A high selectivity of 20% towards C2H6 was achieved, and the reaction pathway was proposed based on in-situ characterization results, demonstrating the essential role of oxygen vacancy in this process.
APPLIED CATALYSIS B-ENVIRONMENTAL
(2021)
Article
Chemistry, Organic
Mohammad Reza Daneshvar, Mina Tavakolian, Mona Hosseini-Sarvari
Summary: In this study, a semiconductor p-n heterojunction, nano CuO/ZnO, was synthesized using a simple, sustainable, and low-cost approach. The synthesized material showed photocatalytic activity in the Chan-Lam coupling reaction and C(sp(3))-H bond oxidation of alkyl aromatic compounds under visible light irradiation. The photocatalyst exhibited high efficiency and maintained activity after multiple uses.
SYNTHESIS-STUTTGART
(2023)
Article
Chemistry, Multidisciplinary
Ekaterina S. Sheina, Tatyana S. Shestakova, Sergey L. Deev, Igor A. Khalymbadzha, Pavel A. Slepukhin, Oleg S. Eltsov, Alexander S. Novikov, Vadim A. Shevyrin, Valery N. Charushin, Oleg N. Chupakhin
Summary: The C-N coupling of 1,2,4-triazolo[1,5-a]pyrimidin-7-ones with 1-adamantanol/1-bromoadamantane leads to the formation of 1,2,4-triazolo[4,3-a]pyrimidinium-5-olates, which are mesomeric betaines (MBs). The structures of the products were confirmed using X-ray analysis and 1D C-13 NMR spectra. Treatment of the betaines with LiHMDS resulted in the formation of anionic carbenes, which were detected using C-13 NMR spectroscopy.
CHEMISTRY-AN ASIAN JOURNAL
(2023)
Article
Chemistry, Applied
Leila K. Sadieva, Igor S. Kovalev, Olga S. Taniya, Vadim A. Platonov, Alexander S. Novikov, Vera S. Berseneva, Sougata Santra, Grigory. Zyryanov, Brindaban C. Ranu, Valery N. Charushin
Summary: Diesters of 1-pyrenecarboxylic acid with tri- and tetra - ethylene glycols were synthesized and characterized, and their photophysical and sensory properties were investigated. These compounds exhibited intense excimeric emission at 521 nm in aqueous solutions, which was attributed to aggregation-induced fluorescence of the pre-associated dimers in the ground state. A strong fluorescence quenching response towards common nitro-explosive components and aliphatic nitro compounds was observed in aqueous solutions through excimeric emission quenching. The chemosensor 4a showed the highest Stern-Volmer fluorescence quenching constant of 8.75 x 106 M-1 in the presence of TNT.
Article
Chemistry, Physical
Yulia Kuznetsova, Ivan D. Popov, Evgeny Yu. Gerasimov, Andrey A. Rempel
Summary: In this study, the impact of the ligand shell on the stability and optical properties of CdS quantum dots in a water colloidal solution stabilized by MPS was investigated. The relationship between stability and nanoparticle parameters including hydrodynamic radius, nucleus size, and zeta-potential was established. The optimal synthesis conditions for stable colloidal solutions with luminescence were identified. The mechanism of the organic MPS shell's structural organization, bonding to the semiconductor nanoparticle surface, and its influence on agglomeration were developed. Additionally, a mechanism for switching on the luminescence of MPS-capped CdS quantum dots in water solution through pH control was proposed.
JOURNAL OF MOLECULAR LIQUIDS
(2023)
Article
Biochemistry & Molecular Biology
Alexander Spasov, Irina Ovchinnikova, Olga Fedorova, Yulia Titova, Denis Babkov, Vadim Kosolapov, Alexander Borisov, Elena Sokolova, Vladlen Klochkov, Maria Skripka, Yulia Velikorodnaya, Alexey Smirnov, Gennady Rusinov, Valery Charushin
Summary: The problem of lung damage caused by excessive inflammation and cytokine release during infections is still a concern. This study focuses on the design and synthesis of amino derivatives of specific pyrimidines as potential drugs inhibiting IL-6 and NO. Testing on murine macrophages showed that seven compounds inhibited the synthesis of nitric oxide and interleukin 6 at a concentration of 100 μM. The most active compounds demonstrated minimal impact on innate immunity, unlike the reference drug dexamethasone, and showed promising protective activity in an animal model of acute lung injury.
Article
Chemistry, Multidisciplinary
N. A. Rasputin, I. A. Vlasov, S. V. Yakovlev, G. A. Artem'ev, I. L. Nikonov, D. S. Kopchuk, A. I. Matern, V. N. Charushin
Summary: Ultra-high-molecular-weight polyethylene (UHMWPE) with an elevated melting point T-m of up to 144 degrees C has been successfully fabricated by suspension polymerization initiated by Ziegler-Natta catalysts in a 1H,4H-octafluorobutane medium. This method allows efficient polymerization at near-ambient temperature and near-atmospheric ethylene pressure. The synthesized polymers have been characterized by IR spectroscopy, elemental analysis, and thermal analysis to determine melting points and degrees of crystallinity.
Article
Biochemistry & Molecular Biology
Alexandra E. E. Kopotilova, Tatyana N. N. Moshkina, Emiliya V. V. Nosova, Galina N. N. Lipunova, Ekaterina S. S. Starnovskaya, Dmitry S. S. Kopchuk, Grigory A. A. Kim, Vasiliy S. S. Gaviko, Pavel A. A. Slepukhin, Valery N. N. Charushin
Summary: Amino-[1,1 ']-biphenyl-containing 3-aryl-[1,2,4]triazolo[4,3-c]quinazoline derivatives with fluorescent properties were synthesized and their structures were confirmed by X-ray diffraction. The compounds exhibited non-planar structures with aryl substituents forming pincer-like conformations. The UV/Vis and photoluminescent properties were investigated in different solvents and in solid state, showing broad emission wavelengths and high quantum yields. Solvatochromic properties and aggregation-induced emission enhancement were observed for the substituted triazoloquinazolines. Moreover, changes in absorption and emission spectra were induced by trifluoroacetic acid and acidochromism was observed for some triazoloquinazoline compounds. Electronic-structure calculations were performed for the synthesized compounds.
Article
Chemistry, Multidisciplinary
Yu. A. Kvashnin, E. M. Krynina, M. V. Medvedeva, T. S. Svalova, A. N. Kozitsina, O. S. Eltsov, G. L. Rusinov, E. V. Verbitskiy, V. N. Charushin
Summary: A simple synthetic route was developed to prepare hard-to-prepare polycyclic (hetero)aromatic compounds with the [1,2,5]chalcogenodiazolo[3,4-b]pyrazine scaffold based on intramolecular nucleophilic aromatic hydrogen substitution reaction. The synthesized polycyclic systems were demonstrated to be narrow-bandgap (from 1.25 to 1.44 eV) n-type organic semiconductors through electrochemical and photophysical measurements, with energy levels comparable to commercially available electronic semiconductors.
RUSSIAN CHEMICAL BULLETIN
(2023)
Article
Chemistry, Multidisciplinary
A. S. Steparuk, Yu. A. Kvashnin, G. L. Rusinov, E. V. Verbitskiy, A. E. Aleksandrov, D. A. Lypenko, A. R. Tameev, V. N. Charushin
Summary: The possibility of using furazanopyrazine-based push-pull systems in OLEDs and photovoltaic film devices was demonstrated for the first time. The obtained light-emitting diodes exhibited yellow-green emission, with a maximum brightness of 45600 cd m(-2) achieved at a maximum current efficiency of 2.9 cd A(-1). It was found that the charge carrier mobility in these push-pull systems, measured in different current modes, ranged from 10(-4) to 4 center dot 10(-6) cm(2) V-1 s(-1), considerably exceeding the values of the well-known compound Spiro-MeOTAD widely used in high-efficiency photovoltaic devices.
RUSSIAN CHEMICAL BULLETIN
(2023)
Article
Chemistry, Multidisciplinary
E. M. Zhilina, A. S. Russkih, T. V. Osinkina, E. V. Ignatieva, S. A. Petrova, S. A. Krasikov, A. V. Dolmatov, A. A. Rempel
Summary: We have successfully prepared AlTiZrVNb high-entropy alloys using a joint aluminothermic reduction method. V and Nb undergo higher reduction extent, with about 90% of their amounts transferring into the metal phase, while Ti and Zr undergo lower reduction extent, with 76% and 50% of their amounts transitioning into the metal phase, respectively. The obtained alloy has a multiphase structure consisting of C14 Laves phases, Zr5Al3-type phases, and a B2-type ordered phase, which serves as the matrix. The microhardness of the alloy is 6.37 GPa, comparable to that of refractory HEAs. The structure of the obtained alloy exhibits a similar coarse-grained feature throughout its bulk, with some pores partly filled with non-metallic aluminum oxide inclusions.
RUSSIAN CHEMICAL BULLETIN
(2023)
Article
Chemistry, Physical
N. V. Pechishcheva, D. P. Ordinartsev, A. A. Valeeva, P. V. Zaitseva, A. D. Korobitsyna, A. A. Sushnikova, A. V. Kim, K. Yu. Shunyaev, A. A. Rempel'
Summary: The properties of nanosized sorbents prepared by high-energy milling from microcrystalline powder of rutile modification were studied. The results showed that milling to an average crystallite size of 30 nm and ultraviolet illumination significantly improved the sorption properties of rutile for chromium and its ability to be reduced. The maximum removal of Cr(VI) from aqueous solutions was achieved under UV illumination in an acetate buffer medium at pH 4-5 and a content of ground rutile of 16.7 g/L. A mechanism for adsorption was proposed.
RUSSIAN JOURNAL OF PHYSICAL CHEMISTRY A
(2023)
Article
Chemistry, Organic
Igor A. Lavrinchenko, Timofey D. Moseev, Yuri A. Seleznev, Mikhail V. Varaksin, Anton N. Tsmokaluk, Valery N. Charushin, Oleg N. Chupakhin
Summary: A convenient multistep synthetic method was reported to design push-pull fluorophores based on the N(2)-fluoroaryl-1,2,3-triazole scaffold for blue-emitting organic materials. The synthetic strategy involved five steps with yields ranging from 60% to 99% at each stage. The obtained photoactive molecules showed blue-violet emission with a quantum yield of >99% in solvents of different polarities. The electron transfer mechanism in the excited states was also studied using DFT and CIS calculations.
ASIAN JOURNAL OF ORGANIC CHEMISTRY
(2023)
Article
Engineering, Chemical
Egor A. Nikiforov, Nailya F. Vaskina, Timofey D. Moseev, Mikhail V. Varaksin, Ilya I. Butorin, Vsevolod V. Melekhin, Maria D. Tokhtueva, Dmitrii G. Mazhukin, Alexsei Y. Tikhonov, Valery N. Charushin, Oleg N. Chupakhin
Summary: The Metal-free C-H/C-H coupling reactions between 4H-imidazole 3-oxides and indoles were achieved using the nucleophilic substitution of hydrogen (S-N(H)) strategy, leading to the synthesis of novel bifunctional azaheterocyclic derivatives with high yields (up to 95%). Molecular docking experiments confirmed the binding ability of the synthesized azaheterocyclic molecules to biotargets associated with neurodegenerative diseases. In vitro tests on human embryo kidney cells (HEK-293) showed that the compound containing both 5-phenyl-4H-imidazole and 1-methyl-1H-indole moieties exhibited the lowest cytotoxicity (IC50 > 300 μM) and the highest binding energy in the protein-ligand complex (AChE, -13.57 kcal/mol). These compounds have significant importance in medicinal chemistry, particularly for the targeted design of small-molecule candidates for neurodegenerative disorder treatment.
Article
Chemistry, Analytical
Roman D. Chuvashov, Ekaterina F. Zhilina, Kseniya I. Lugovik, Anna A. Baranova, Konstantin O. Khokhlov, Danil V. Belyaev, Mohamad Zen Eddin, Gennady L. Rusinov, Egor V. Verbitskiy, Valery N. Charushin
Summary: This article studies the well-known fluorophore 1,3,6,8-tetrakis[(trimethylsilyl)ethynyl]pyrene as a fluorescent sensor for nitroaromatic compounds. Three prototypes of fluorescent materials were prepared for vapor sensing. It was found that this fluorophore and its solid fluorescent materials have high detection limits for nitroaromatic compounds in solution and vapor phase. The prototypes can be used as sensor materials for real-time detection of nitro-containing explosives in the vapor phase.
Article
Biochemistry & Molecular Biology
Mohammed S. Mohammed, Igor S. Kovalev, Natalya V. Slovesnova, Leila K. Sadieva, Vadim A. Platonov, Alexander S. Novikov, Sougata Santra, Julia E. Morozova, Grigory V. Zyryanov, Valery N. Charushin, Brindaban C. Ranu
Summary: This manuscript reports the synthesis of 2-Ar-5-(4-(4-Ar'-1H-1,2,3-triazol-1-yl)phenyl)-1,3,4-oxadiazoles as PAH-based aza-analogues of POPOP by Cu-catalyzed click reaction. The photophysical properties of the obtained products were investigated, and their sensory response to nitroanalytes was evaluated. Dramatic fluorescence quenching by nitroanalytes was observed in the case of pyrenyl-1-substituted aza-POPOP.
INTERNATIONAL JOURNAL OF MOLECULAR SCIENCES
(2023)
Article
Chemistry, Multidisciplinary
Polina O. Serebrennikova, Julia A. Paznikova, Eva A. Kirnos, Irina A. Utepova, Elizaveta D. Kazakova, Vladimir F. Lazarev, Liubov S. Kuznetcova, Boris A. Margulis, Irina V. Guzhova, Oleg N. Chupakhin, Alexey P. Sarapultsev
Summary: The present study synthesized new derivatives of mono- and bis-1,2,4-triazoloazines and evaluated their cytotoxic activity against cancer cells. These compounds exhibited significant toxicity towards tumor cells while having minimal effects on normal cells, suggesting their potential as effective and selective anticancer agents.
NEW JOURNAL OF CHEMISTRY
(2023)
Article
Chemistry, Multidisciplinary
Xuemei Liu, Chaonan Cui, Shuoshuo Wei, Jinyu Han, Xinli Zhu, Qingfeng Ge, Hua Wang
Summary: This study presents a new strategy for designing efficient photocatalysts that can convert CO2 into hydrocarbons by utilizing synergistic catalytic sites. The findings provide a solution for the selective photocatalytic reduction of CO2 to CH4.
Article
Chemistry, Multidisciplinary
Chengxian Hu, Dan Wang, Lu Wang, Ying Fu, Zhengyin Du
Summary: A novel one-pot, three-component reaction conducted under electrochemical conditions was studied. The reaction involved 2-aminothiophenols, aldehydes, and malononitrile, using TBABF4 as an electrolyte and CuI as a catalyst. The proposed reaction mechanism suggested that CuI served as an electron relay. This method offers simplified operation, high atom economy, and mild reaction conditions.
Article
Chemistry, Multidisciplinary
Zhi Yang, Yu Chen, Linxi Wan, Yuxiao Li, Dan Chen, Jianlin Tao, Pei Tang, Fen-Er Chen
Summary: A highly enantioselective method for the complete hydrogenation of pyrimidinium salts using Ir/(S,S)-f-Binaphane complex as the catalyst was developed. This method provides easy access to fully saturated chiral hexahydropyrimidines, which are prevalent in many bioactive molecules. The reactions exhibit high yields and enantioselectivities under mild reaction conditions without additives. Successful application of this methodology in a continuous flow fashion further extends its practical utility.
Article
Chemistry, Multidisciplinary
Tina Jeoh, Jennifer Danger Nill, Wujun Zhao, Sankar Raju Narayanasamy, Liang Chen, Hoi-Ying N. Holman
Summary: In this study, the enzymatic hydrolysis of cellulose was investigated using real-time infrared spectromicroscopy. The spatial heterogeneity of cellulose was found to impact the hydrolysis kinetics. Hydration affected cellulose ordering, and Cel7A preferentially removed less extensively hydrogen bonded cellulose.
Article
Chemistry, Multidisciplinary
Tiphaine Richard, Walid Abdallah, Xavier Trivelli, Mathieu Sauthier, Clement Dumont
Summary: An effective method of grafting functionalities onto lignin based on glycerol carbonate has been developed using an efficient nickel-catalysed telomerisation reaction. This method allows lignin to have new reactive functions and reduces the glass transition temperatures of modified lignins, thereby expanding the application range of lignin-based resins.
Article
Chemistry, Multidisciplinary
Jing Qi, Xiyan Wang, Gan Wang, Srinivas Reddy Dubbaka, Patrick ONeill, Hwee Ting Ang, Jie Wu
Summary: This study presents a green and environmentally friendly approach for the synthesis of imides using electrocatalytic oxidation with H2O as the oxygen source. The method eliminates the need for toxic or expensive oxidants and achieves high yields under mild reaction conditions. It shows broad substrate compatibility and potential for industrial applications.
Article
Chemistry, Multidisciplinary
Babasaheb Sopan Gore, Lin-Wei Pan, Jun-Hao Lin, Yi-Chi Luo, Jeh-Jeng Wang
Summary: Here, we report a visible light-promoted intramolecular radical cascade reaction for the construction of fluorenol and naphthalene-fused cyclopropyl carbaldehyde derivatives. This method offers mild reaction conditions, a broad substrate scope, excellent step efficiency, and scalability, without the need for external chemical oxidants. The novelty of this protocol was demonstrated by synthesizing chrysene analogs and performing late-stage functionalizations.
Article
Chemistry, Multidisciplinary
Juho Antti Sirvio, Idamaria Romakkaniemi, Juha Ahola, Svitlana Filonenko, Juha P. Heiskanen, Ari Ammala
Summary: This article discusses the method of using supramolecular interaction between an aromatic hydrogen bond donor and lignin to achieve rapid delignification of softwood at low temperatures.
Article
Chemistry, Multidisciplinary
Yunyan Meng, Chunxiang Pan, Na Liu, Hongjiang Li, Zixiu Liu, Yao Deng, Zixiang Wei, Jianbin Xu, Baomin Fan
Summary: A novel visible light-driven synthesis method for 2,3-diamines has been developed, which has mild conditions, avoids the use of metal reagents, and can synthesize diamines and diols in one pot.
Article
Chemistry, Multidisciplinary
Mingqing Huang, Haiyang Huang, Mengyao You, Xinxin Zhang, Longgen Sun, Chao Chen, Zhichao Mei, Ruchun Yang, Qiang Xiao
Summary: A direct air-oxidized strategy for the synthesis of benzo[b]phosphole oxides was developed in this study. Arylphosphine oxides were transformed into phosphinoyl radicals, which were further combined with various alkynes to achieve the desired products. DFT calculations revealed the mechanism of phosphinoyl radical formation.
Article
Chemistry, Multidisciplinary
Anwei Wang, Jiayin Huang, Chunsheng Zhao, Yu Fan, Junfeng Qian, Qun Chen, Mingyang He, Weiyou Zhou
Summary: This study demonstrates an innovative strategy for the aerobic oxidation of C(sp(3))-H bonds using gamma-valerolactone. By optimizing the reaction conditions and utilizing specific catalysts, efficient oxidation of C(sp(3))-H bonds is achieved with good chemoselectivity in certain cases.
Article
Chemistry, Multidisciplinary
Shun Li, Likai Tong, Zhijian Peng, Bo Zhang, Xiuli Fu
Summary: Sulfide compounds show promise as electrocatalysts for water splitting, but their performance is limited by factors such as limited active sites and hindered substance transport. This study successfully prepared a high-entropy sulfide (ZnCoMnFeAlMg)(9)S-8, which reduced grain size and increased specific surface area, enabling the realization of a dual-functional catalyst with multiple catalytic sites. High entropy also modulated the electronic properties of sulfides, reducing the potential energy barrier for hydrolysis. This research introduces a new approach for functionalizing high entropy nanomaterials and improves the performance of water splitting catalysts.
