Article
Engineering, Chemical
Ling Li, Chengjin Xu, Xiujing Peng, Miaomiao Zhang, Shah Zeb, Xu Jiang, Yan Liu, Yu Cui, Guoxin Sun
Summary: The study found that DEDCHMA has higher extraction capacity for Pd(II) compared to other extractants, and it can also treat wastes containing associated precious and common base metals efficiently.
SEPARATION AND PURIFICATION TECHNOLOGY
(2021)
Article
Chemistry, Applied
Bingxiang Xue, Jie Shen, Sourav Manna, Angelino Doppiu, Lukas J. Goossen
Summary: A new catalyst has been discovered that can selectively introduce a primary amino group into aromatic compounds, and it can efficiently promote the amination reaction to synthesize primary anilines within 30 minutes.
ADVANCED SYNTHESIS & CATALYSIS
(2023)
Article
Chemistry, Physical
Amit Kumar Simlandy, Mao-Yun Lyu, M. Kevin Brown
Summary: The paper presents a method for synthesizing highly substituted spirocyclic cyclobutanes through catalytic arylation of cyclobutenes using Cu/Pd or Ni catalysts. The identification of a suitable Cu complex for arylboration is crucial for achieving high selectivity in Cu/Pd catalyzed reactions. The synthetic utility of the products is demonstrated, with mechanistic details discussed.
Article
Chemistry, Inorganic & Nuclear
Rabina Pradhan, Vincent M. Groner, Nicolas A. Johnson, Qiang Zhang, Mark F. Roll, James G. Moberly, Kristopher Waynant
Summary: Redox-active azothioformamides ligands can rapidly coordinate to transition metals and form unique coordination complexes upon addition of metal salt. The experiment results indicate that alkyl azothioformamide ligands do not exhibit redox activity when binding to copper(I) salts.
INORGANIC CHEMISTRY COMMUNICATIONS
(2021)
Article
Chemistry, Organic
Xiangmeng Deng, Ying Wang, Jin-Biao Liu, Changfeng Wan, Nianhua Luo
Summary: In this paper, a copper-catalyzed cross-dehydrogenative coupling reaction was reported to synthesize a series of N-methoxy-1 phosphoryloxy imidates. The O-functionalization of N-methoxamides was achieved while avoiding N-functionalization. The study demonstrated the essential role of the N-methoxy group in the selectivity and activity of the reaction.
TETRAHEDRON LETTERS
(2022)
Article
Chemistry, Physical
Yukihiro Yoshimura, Takahiro Takekiyo, Atsushi Yamada, Kazuyoshi Kaneko, Kodai Kikuchi, Ryo Fukaya, Kosuke Kaneko, Tomonori Hanasaki, Akio Shimizu
Summary: By using Raman spectroscopy and molecular dynamics (MD) simulations, we investigated the conformational equilibrium of cations in N,N-diethyl-N-methyl-N-(2-methoxyethyl) ammonium ([DEME][X], X = BF4 and I) ionic liquid (IL)-water mixtures as a function of water concentration. We observed that the folded form of the [DEME] cation remained stable regardless of the anion species and its proportion in the mixtures did not change significantly with water concentration. This behavior was different from that of imidazolium IL-water mixtures, where the equilibrium shifted with water concentration. Interestingly, the stability of the [DEME] cations in the mixtures was unrelated to the states of water molecules. We speculated that the intramolecular attractive interaction between the N and O atoms in the [DEME] cation might play a key role in maintaining the stability of the folded form.
JOURNAL OF MOLECULAR LIQUIDS
(2023)
Article
Chemistry, Organic
Dongming Zhang, Bin Lv, Pan Gao, Xiaodong Jia, Yu Yuan
Summary: An efficient Cu-catalyzed strategy for the direct C–H amination of arenes in high yields using N-hydroxyphthalimide as the amidyl radical precursor under air is reported. A possible mechanism is proposed that proceeds via a radical reaction in the presence of CuBr and triethyl phosphite.
BEILSTEIN JOURNAL OF ORGANIC CHEMISTRY
(2022)
Article
Chemistry, Multidisciplinary
Azusa Kondoh, Kohei Aita, Masahiro Terada
Summary: Efficient methods were developed for the synthesis of furan-fused tricyclic compounds using a regiodivergent intramolecular carbometalation strategy. Two different sequences were employed, resulting in 2,3,4,5-tetrasubstituted naphtho[1,2-b]furans and 2,3-disubstituted 4-alkylidene-4H-indeno[1,2-b]furans. These methods provide access to a wide range of polysubstituted naphtho[1,2-b]furans and indeno[1,2-b]furans in a positional selective manner.
CHEMISTRY-A EUROPEAN JOURNAL
(2023)
Article
Chemistry, Multidisciplinary
Zhi-Peng Bao, Xiao-Feng Wu
Summary: This article develops an efficient and convenient palladium-catalyzed carbonylation reaction for the synthesis of 2-cyano-N-acetamide and 2-cyanoacetate compounds. The reaction proceeds under mild conditions via a radical intermediate, suitable for late-stage functionalization. Gram-scale experiment was successfully performed with low catalyst loading, yielding the target product excellently. Additionally, this transformation can be carried out under atmospheric pressure and provides alternative routes to drug precursors.
ANGEWANDTE CHEMIE-INTERNATIONAL EDITION
(2023)
Article
Chemistry, Applied
Zhengyan Huang, Qianqian Zhang, Xiaofei Yi, Zongxiang Zhao, Wenquan Yu, Junbiao Chang
Summary: A new synthetic strategy for synthesizing 2-imino-1,3,4-selenadiazole derivatives has been proposed, which involves sequential oxidation and a tributylphosphine-promoted annulation reaction. The method has the advantages of absence of transition metals and potential for gram-scale synthesis.
ADVANCED SYNTHESIS & CATALYSIS
(2021)
Article
Chemistry, Multidisciplinary
Jiamin Xu, Xiaowen Guo, Yejun Guan, Peng Wu
Summary: This study reveals the influence of Pd deposition pH value on the catalytic performance of Pd-CuO/SiO2 catalyst for the semi-hydrogenation of 2-methyl-3-butyn-2-ol. The results show that the pH value at which Pd was deposited plays a crucial role in determining the catalytic activity and selectivity of the catalyst.
CHINESE CHEMICAL LETTERS
(2022)
Article
Chemistry, Multidisciplinary
Rhone Brocha P. Silalahi, Yongsung Jo, Jian-Hong Liao, Tzu-Hao Chiu, Eunsaem Park, Woojun Choi, Hao Liang, Samia Kahlal, Jean-Yves Saillard, Dongil Lee, C. W. Liu
Summary: The first hydride-containing 2-electron palladium/copper alloys, PdHCu11 and PdHCu12, were synthesized. X-ray diffraction reveals that the PdHCu11 and PdHCu12 kernels consist of a central PdH unit encapsulated within a vertex-missing Cu-11 cuboctahedron and complete Cu-12 cuboctahedron, respectively. PdHCu11 shows excellent HER activity, with an onset potential of -0.05 V (at 10 mA cm(-2)) and consistent HER activity during 1000 cycles in 0.5 M H2SO4.
ANGEWANDTE CHEMIE-INTERNATIONAL EDITION
(2023)
Article
Chemistry, Physical
Mingjun Han, Xin Wei, Jianyong He, Wenyuan Li, Wei Sun, Chenyang Zhang
Summary: In this study, the pKa values of AMPA functional group were calculated by first-principles density functional theory (DFT), and the interaction mechanism between Cu(II) and Ni(II) with AMPA was elucidated by electron localization function (ELF) and ligand field theory. The results showed that Cu(II) can replace protons of AMPA and form chelating substrates, while Ni(II) cannot. Moreover, Cu(II) has stronger interaction with AMPA compared to Ni(II), demonstrating its selective adsorption ability.
APPLIED SURFACE SCIENCE
(2023)
Article
Biochemistry & Molecular Biology
Janet Ocampo-Hernandez, Jose de Jesus Gomez-Guzman, Marisela Cruz-Ramirez, Juan Pablo F Rebolledo-Chavez, Angel Mendoza, Rafael Moreno-Esparza, Luis Ortiz-Frade
Summary: In this study, we investigated the interaction between a model complex [Cu-iota iota(Bztpen)](2+) and transport proteins, such as Bovine Serum Albumin (BSA), using electrochemical, spectroscopic and spectro-electrochemical methods. The results showed a weak interaction between the copper complex and BSA, with no adsorption of the protein on the electrode surface.
JOURNAL OF INORGANIC BIOCHEMISTRY
(2022)
Article
Chemistry, Organic
Ya-Wen Xu, Jiankun Wang, Guangji Wang, Le Zhen
Summary: A novel metal-free protocol for the construction of pyrrolo[2,1-a]isoquinolines through a DEAD-promoted oxidative [3+2] cycloaddition/aromatization tandem reaction has been developed. The reaction, utilizing DEAD as the sole oxidant, proceeds smoothly with a broad substrate scope, giving moderate to good isolated yields.
JOURNAL OF ORGANIC CHEMISTRY
(2021)
Article
Chemistry, Organic
Geeta Devi Yadav, Pooja Chaudhary, Balaram Pani, Surendra Singh
Summary: Chiral transition metal complexes with privileged ligands are efficient catalysts for various asymmetric organic transformations. Transition metal complexes of C1-symmetric pyrrolidine-based ligands have been widely used in asymmetric organic reactions. However, a comprehensive review article on the transition metal complexes of chiral C1-symmetric pyrrolidine-based ligands derived from (L)-proline has not been published.
TETRAHEDRON LETTERS
(2024)
