Article
Chemistry, Medicinal
Lakshmi Goswami, Lovely Gupta, Sayantan Paul, Pooja Vijayaraghavan, Asish K. Bhattacharya
Summary: Researchers synthesized 1,6-diphenoxyhexa-2,4-diyne derivatives and evaluated their antifungal activity. One compound showed promising antifungal activity, suggesting potential for developing new antifungal agents.
Article
Chemistry, Multidisciplinary
Zhenghong Zhou, Jimin Yang, Bo Yang, Yang Han, Lijuan Zhu, Xiao-Song Xue, Feng Zhu
Summary: This study presents a pioneering example of nickel-catalysed enantioconvergent Stille cross-coupling reactions. The reactions result in the formation of C-C bonds in good to high yields with excellent stereoselectivity, providing a practical and cost-effective method for synthesis. The innovative use of synergistic photoredox/nickel catalysis enables a novel single-electron transmetalation process, opening up new research possibilities in the field of Stille reactions.
ANGEWANDTE CHEMIE-INTERNATIONAL EDITION
(2023)
Article
Chemistry, Multidisciplinary
Peng-Zi Wang, Xue Wu, Ying Cheng, Min Jiang, Wen-Jing Xiao, Jia-Rong Chen
Summary: A new method for three-component coupling reaction using chiral copper catalyst and purple-LED irradiation as an alternative to allylic oxidation was reported. The reaction features mild conditions, broad scope, and high functional group tolerance, making it useful for late-stage modification of pharmaceuticals and natural products. Detailed mechanistic studies support a radical-based reaction pathway.
ANGEWANDTE CHEMIE-INTERNATIONAL EDITION
(2021)
Article
Chemistry, Physical
Deng-Yue Zheng, Rongxian Bai, Minghao Li, Yanlong Gu
Summary: Cu complexes supported on metal-organic frameworks (MOFs) demonstrated high catalytic efficiency in Glaser heterocoupling reactions. The newly designed MIL-101-NH-TMEDA.CuClx showed the highest catalytic activity and selectivity compared to other reference catalysts, without the need for external ligands.
Article
Chemistry, Physical
Victorio Cadierno
Summary: Metal-catalyzed hydrofunctionalization reactions of alkynes, especially conjugated 1,3-diynes, have been extensively studied. These reactions provide a straightforward and efficient route to functionalized olefins and various heterocyclic and carbocyclic compounds. However, the regio- and stereocontrol issues associated with conjugated 1,3-diynes make the hydrofunctionalization reactions challenging.
Article
Chemistry, Physical
Bijan Mirabi, Austin D. Marchese, Mark Lautens
Summary: In this study, a nickel-catalyzed cross-electrophile coupling reaction of aryl chlorides and heteroaryl chlorides was reported, enabled by a synergistic combination of halide effects and the addition of a magnesium salt. Electronic-deficient aryl chlorides were found to perform the best in the reaction, and preliminary mechanistic evidence showed that MgCl2 is crucial for accelerating the reduction of Ni(II) while small quantities of iodide lead to improved yields.
Review
Chemistry, Inorganic & Nuclear
Prensha Arora, Parveen Kumar, Vijesh Tomar, Mika Sillanpaa, Raj Kumar Joshi, Meena Nemiwal
Summary: Molecules containing nitrogen play a crucial role in synthetic chemistry. The Cu-catalyzed cross-coupling reactions that create C-N bonds are an important method for synthesizing anilines and aniline derivatives. The use of nanomaterials catalysis in C-N coupling reactions is attracting great attention due to its greener approach. This review provides a comprehensive overview of the copper oxide nanoparticles catalyzed C-N bond formation.
INORGANIC CHEMISTRY COMMUNICATIONS
(2022)
Article
Chemistry, Organic
Suresh Kumar Yadav, Balu Ramesh, Masilamani Jeganmohan
Summary: This study describes an air-stable, highly abundant, and cost-effective Co(III)-catalyzed redox-neutral [4 + 2] annulation reaction of aromatic sulfoxonium ylides with 1,3-diynes, resulting in the synthesis of useful substituted 1-naphthol derivatives in a regioselective manner. Furthermore, the prepared 1-naphthols with internal alkynes were converted into polycarbocyclic molecules and spiro-dienone derivatives with high yields. A possible reaction mechanism involving ortho C-H activation as a key step was proposed and supported by deuterium labeling and kinetic isotope labeling studies.
JOURNAL OF ORGANIC CHEMISTRY
(2022)
Article
Chemistry, Physical
Suman Ghosh, Rajesh Chakrabortty, Shailendra Kumar, Aniruddha Das, Venkataraman Ganesh
Summary: This paper presents a method for protoboration, achieving the synthesis of complex target structures, as well as operationally simple and regioselective reaction conditions for the preparation of products with added value.
Article
Chemistry, Physical
Suman Ghosh, Rajesh Chakrabortty, Shailendra Kumar, Aniruddha Das, Venkataraman Ganesh
Summary: This paper presents the protoboration of 1,3-diynes as a platform for the iterative functionalization of various groups on enynes and dienes. Synthetic approaches to targets with high complexity are directed toward using small, modular building blocks similar to a Lego construction using iterative chemistry and automated synthesis. Organoboron compounds are currently in the spotlight for achieving these goals. Here, we report an operationally simple, regioselective protoboration of 1,3-diynes using a mixed diboron reagent and Cu(I)/phosphine catalyst to provide enynylboronates in good yields. Under similar conditions, diprotoboration of 1,3-diynes was also achieved to access bench-stable 1,4-diboryl-1,3-dienes in good yields and regioselectivities. The iterative coupling capabilities of the products have been demonstrated along with other downstream transformations offering a range of value-added skeletons.
Article
Chemistry, Physical
Lantao Liu, Fangyuan Cheng, Chenxiang Meng, An-An Zhang, Mingliang Zhang, Kai Xu, Naoki Ishida, Masahiro Murakami
Summary: A Pd-catalyzed chemo-, regio-, and enantioselective ring-closing/ring-opening cross coupling reaction has been developed with diverse aryl halide-tethered alkenes and benzocyclobutenols as substrates. This method provides a convenient approach to chiral 2,3-dihydrobenzofurans with excellent enantioselectivities, and has been applied in the concise synthesis of analogues of cannabinoid receptor 2 agonists.
Article
Chemistry, Multidisciplinary
Xiang-Lei Han, Bin Hu, Chao Fei, Zhe Li, Yang Yu, Cheng Cheng, Bruce Foxman, Jisheng Luo, Li Deng
Summary: This study reports an unprecedented catalytic asymmetric cross-coupling reaction that allows a variety of ketimines and aldimines to react, resulting in the direct synthesis of chiral vicinal diamines. This reaction is enabled by the development of a new chiral ammonium catalyst, which leads to highly diastereo- and enantioselective formation of diverse chiral vicinal diamines. It establishes a new approach for the asymmetric synthesis of chiral vicinal diamines.
JOURNAL OF THE AMERICAN CHEMICAL SOCIETY
(2023)
Article
Chemistry, Physical
Manoj V. Mane, Sayan Dutta, Luigi Cavallo, Bholanath Maity
Summary: In recent years, there has been a growing interest in multicomponent reactions (MCRs) as environmentally friendly and reliable synthetic strategies for drug discovery. This article discusses theoretical investigations that unravel the mechanistic pathways in IrIII-CuII dual-catalyzed MCRs, experimentally reported by MacMillan, and explains the origin of selectivity between three-component and two-component coupling products. The results suggest that N-H bond activation is the rate-limiting step and the preference for a two-component product is governed by the relative stabilities of the CuII-X center dot intermediates.
Article
Chemistry, Organic
Ya-Qiong Qi, Shuai Liu, Yan Xu, Yang Li, Tong Su, Hai-Liang Ni, Yuanji Gao, Wenhao Yu, Peng Cao, Ping Hu, Ke-Qing Zhao, Bi-Qin Wang, Bin Chen
Summary: We report an efficient Ni-catalyzed three-component cross-electrophile coupling reaction, which accomplishes dicarbofunctionalization of 1,3-dienes by forming two new C-C bonds in one reaction.
Article
Chemistry, Organic
Sheng Zhang, Hao Zhang, Zhuang-Ping Zhan
Summary: A highly efficient hydroallylation reaction of 1,3-diynes with allylborons was developed, with the regioselectivity governed primarily by the appropriate choice of the metal. A series of unsymmetrical and symmetrical 1,3-diynes could undergo this transformation leading to the switch of two regioselective allyl-functionalized 1,3-enynes when palladium and nickel bearing easily available phosphorus ligands were respectively employed.
ORGANIC CHEMISTRY FRONTIERS
(2022)
Article
Chemistry, Physical
Haojie Li, Bingke Yang, Zhen Yao, Xuetao Wang, Kaiming Shen, Mengjie Liu
Summary: This study systematically investigates the influence of metal and nonmetal element doping on the photochemical properties of g-C3N4 for efficient catalytic AB hydrogen production. It provides a design method for high performance bifunctional catalysts of photocatalysis and metal catalysis. The results show that both non-metals (B, P) and metals (Ru, Ni) have efficient regulatory effects on the band structure of g-C3N4, resulting in a reduced band gap and improved hydrogen production. The study offers a theoretical method for the coupling of metal catalysis/photocatalysis ammonia borane to produce hydrogen.
MOLECULAR CATALYSIS
(2024)
Article
Chemistry, Physical
Shrouq Mujahed, Davide Gandolfo, Luigi Vaccaro, Evgueni Kirillov, Dmitri Gelman
Summary: In this study, a high-valent Ru(IV) bifunctional catalyst was successfully applied for the hydrosilylation of various functional groups. The high-valent hydride complexes showed high chemoselectivity and affinity towards reducing polar bonds. The scope, limitations, and plausible mechanism of the reaction were described.
MOLECULAR CATALYSIS
(2024)
Article
Chemistry, Physical
Yongzhen Peng, Kongchen Xia, Qi Wu
Summary: In this study, we report an engineered cyclohexanone monooxygenase that can be used for the asymmetric synthesis of chiral alpha-deuterated carbonyl compounds via enantioselective reductive dehalogenation. The engineered enzyme exhibits good chemoselectivity, stereoselectivity, and d-incorporation, making it a promising method for the synthesis of deuterated drugs.
MOLECULAR CATALYSIS
(2024)
Article
Chemistry, Physical
Qi Yang, Ruixuan Xu, Hongqi Nie, Qilong Yan, Jun Liu, Jiuyu Chen, Yunlan Sun
Summary: The adsorption and decomposition processes of ammonium perchlorate (AP) on pure-Al and Al2O3/Al surfaces were investigated using density functional theory. The results showed that the pure-Al surface is more conducive to the decomposition of AP and the activation of NH3, while the Al2O3/Al surface promotes the disengagement of H and NH3 decomposition.
MOLECULAR CATALYSIS
(2024)
Article
Chemistry, Physical
Yudong Hu, Guochao Xu, Ye Ni
Summary: This study identified a novel phenylalanine dehydrogenase (QtPDH) with high catalytic efficiency and thermal stability, making it a promising biocatalyst for industrial production of bulky aromatic primary amines. QtPDH exhibited a broader substrate specificity and significantly longer half-life compared to BbPDH.
MOLECULAR CATALYSIS
(2024)
Article
Chemistry, Physical
Weiling Zhao, Zhiling Huang, Hui Shen, Xianglong Li, Shaofen Zhao, Bo Xie, Shengjie Xia
Summary: This study investigated the effects of metal doping and crystal plane selection on the CO2 adsorption properties of MgO using density functional theory (DFT) methods. The results showed that the appropriate crystal plane and metal doping can improve the adsorption properties of MgO on CO2. The influence of different crystal planes and metal dopants on CO2 adsorption properties varied significantly. The research provides some references for experimental studies on CO2 adsorption by MgO by combining the dual modification of crystal plane and doped metal.
MOLECULAR CATALYSIS
(2024)
Article
Chemistry, Physical
Jie Zhang, Jinwei Chen, Zongbo Shi, Junyu Zhao, Runsheng Zhuo, Ruilin Wang
Summary: In this study, a double-layered silicalite-1 support with high specific surface area was synthesized, and a magnesium modification strategy was adopted to improve the catalytic activity and stability of the zinc-based catalyst. The modified catalyst showed enhanced propylene selectivity and anti-coking property.
MOLECULAR CATALYSIS
(2024)
Article
Chemistry, Physical
Pei-Sen Gao, Chang-Wang Pan, Cheng Liu, Wen -Tong Chen
Summary: Asymmetric electrocatalysis offers a unique approach to obtain enantioenriched molecules that are difficult to obtain through conventional methods. This study developed a novel bifunctional electrocatalyst, enabling the oxidative kinetic resolution of chiral 1,4-diols and gamma-lactones. The work demonstrates the potential of bifunctional electrocatalysis for asymmetric synthetic methods and its importance in the development of novel electrocatalytic methods.
MOLECULAR CATALYSIS
(2024)
Article
Chemistry, Physical
Qinzhe Lin, Xuanjin Lv, Xianming Zeng, Mengning Zhong, Qiyun Wu, Huilin Ren, Shenpeng Xu, Wentian Chen, Wenting Du, Jun Li
Summary: The catalytic efficiency of engineered IRED M5 was found to be relatively low when tasked with a bulky amine substrate. Rational design led to the mutants M203V and F260A, with F260A exhibiting a substantial improvement in conversion and stereoselectivity. The study revealed the potential molecular mechanisms underlying the effect of F260A and M203V on catalytic performance.
MOLECULAR CATALYSIS
(2024)
Article
Chemistry, Physical
Zhishuai Wang, Fengyun Su, Hailong Cao, Mengzhen Tian, Xiang Li, Haiquan Xie, Xiaoli Jin, Zhengdao Li, Xin Ying Kong
Summary: In this study, the efficiency of photocatalytic CO2 reduction was significantly enhanced by incorporating nickel oxide onto niobium pentoxide. The resulting catalyst showed remarkable methane and carbon monoxide production improvements.
MOLECULAR CATALYSIS
(2024)
Article
Chemistry, Physical
A. Yu. Sidorenko, Yu. M. Kurban, T. V. Khalimonyuk, I. V. Il'ina, N. S. Li-Zhulanov, O. S. Patrusheva, V. V. Goltsova, M. P. Bei, Zh. V. Ihnatovich, J. Warna, K. P. Volcho, N. F. Salakhutdinov, D. Yu. Murzin, V. E. Agabekov
Summary: This study provides a comprehensive investigation into the catalytic condensation of renewable 3-carene with formaldehyde for the one-step preparation of terpenoid trans-4-hydroxymethyl-2-carene. Various acids and alumino-silicates were found to catalyze the reaction, but the selectivity to the desired product was limited. Phosphoric acid showed the highest selectivity, and an excess of formaldehyde or catalyst loading significantly increased the yield of the target product. Water presence also led to increased selectivity. Additionally, a detailed mechanism for the 3-carene condensation with formaldehyde was proposed and confirmed through kinetic modeling.
MOLECULAR CATALYSIS
(2024)
Article
Chemistry, Physical
Meng-Yu Rong, Jing Nie, Shen Li, Jun-An Ma
Summary: We synthesized a new class of chiral quaternary ammonium salts and used them as catalysts in phase-transfer catalytic asymmetric alkylation. By employing these catalysts, we obtained a series of chiral fluorinated aromatic alpha-amino acid derivatives with high yields and enantioselectivities.
MOLECULAR CATALYSIS
(2024)
Article
Chemistry, Physical
Zhaozhou Wei, Guangtao Wei, Huixian Che, Deyuan Xiong, Linye Zhang, Ruihua Xue, Yalin Tang, Xuanli Lu
Summary: This study demonstrates that small-sized graphite crystallite and highly defective carbon-based catalysts can increase the -SO3H density of the catalysts and modulate their surface electronic properties, leading to improved efficiency in the alpha-pinene hydration reaction. The reduction of graphite crystallite size is considered a critical step in enhancing the selectivity of alpha-terpineol.
MOLECULAR CATALYSIS
(2024)
Article
Chemistry, Physical
Kempanna S. Kanakikodi, Nagendra Kulal, K. S. Subramanya, M. S. Puneethkumar, Bhavana B. Kulkarni, Ganapati Shanbhag, Sanjeev P. Maradur
Summary: An effective and highly selective protocol for synthesizing asymmetric organic carbonates using dimethyl carbonate (DMC) as a reactant and solvent has been developed. The performance of CeO2 nanostructures with different morphologies in the carbonate interchange reaction (CIR) of alcohols was investigated, and the CeO2 nano-catalyst with rod morphology exhibited the highest oxygen vacancy and remarkable enhancement in conversion. The CeO2 characterization data revealed that the exposed active sites, defect density, coordination state of surface atoms, and reducibility of the catalytic materials are the contributing factors to its high catalytic activity. CeO2 can be easily recovered and reused for multiple cycles.
MOLECULAR CATALYSIS
(2024)
Article
Chemistry, Physical
Yanzhao Gao, Xianglei Meng, Shiqi Huang, Hui Wu, Liantao Jiang, Yu Zhou, Yuting Song, Yanyan Diao
Summary: Gamma alumina modified with alkaline earth metal shows improved catalytic performance for hydrogenation reactions. Pd catalysts supported by Al2O3 and Mg-modified Al2O3 were synthesized and their structure, composition, and surface acidity were investigated. The results showed that Pd/MgO-Al2O3-2 catalyst exhibited the best catalytic performance due to its metallic state palladium and weak acid sites.
MOLECULAR CATALYSIS
(2024)