Article
Chemistry, Multidisciplinary
Jaime Martin, Enrique Gomez-Bengoa, Alexandre Genoux, Cristina Nevado
Summary: A catalytic method for synthesizing a variety of cyclometalated (C^N)gold(III) complexes is reported. The unprecedented Rh-to-Au(III) transmetalation allows for the easy transfer of (C^N) ligands between the two metals in a redox-neutral process. The reaction uses commercially available precursors and proceeds under mild and environmentally friendly conditions. Experimental and computational studies support a multi-step transmetalation mechanism from rhodium to gold as the underlying process for these transformations.
ANGEWANDTE CHEMIE-INTERNATIONAL EDITION
(2022)
Article
Chemistry, Multidisciplinary
Mitchell J. Demchuk, Joseph A. Zurakowski, Brady J. H. Austen, David J. Nelson, Marcus W. Drover
Summary: Transmetalation is a key method for constructing element-element bonds. Reactive [Ni-II(Ar)(I)(diphosphine)] compounds with arylgold(I) transmetalating agents may lead to aryl-for-iodide and unexpected aryl-for-aryl transmetalation, possibly complicating catalytic cross-coupling reactions.
CHEMICAL COMMUNICATIONS
(2021)
Article
Chemistry, Analytical
Tribidasari A. Ivandini, Muhammad S. P. Luhur, Munawar Khalil, Yasuaki Einaga
Summary: Gold-palladium nanoparticles were successfully modified on boron-doped diamond electrodes for oxygen reduction reaction and BOD sensing applications. By controlling palladium concentration, different shapes of Au@PdNPs were obtained, showing higher response in oxygen reduction reaction compared to gold and platinum electrodes.
Article
Chemistry, Physical
Matej Zlatar, Daniel Escalera-Lopez, Miquel Gamon Rodriguez, Tomas Hrbek, Carina Goetz, Rani Mary Joy, Alan Savan, Hoang Phi Tran, Hong Nhan Nong, Paulius Pobedinskas, Valentin Briega-Martos, Andreas Hutzler, Thomas Boehm, Ken Haenen, Alfred Ludwig, Ivan Khalakhan, Peter Strasser, Serhiy Cherevko
Summary: This study evaluates the activity and stability of an iridium catalyst by modifying AST parameters and backing electrodes, and monitors their impact using various spectroscopy and microscopy techniques. The results show that the choice of lower potential limit (LPL) in ASTs and backing electrode significantly affects the evaluation of iridium-based electrocatalysts. These findings highlight the importance of optimizing ASTs parameters and electrode selection, and lay the foundation for developing standardized test protocols for high-performance catalysts.
Review
Chemistry, Multidisciplinary
Giovanni Salassa, Luca Salassa
Summary: This passage highlights methods developed by coordination and organometallic chemists that surpass mainstream inorganic reactivity. Through transmetalation, metal exchange, metal cooperativity, and catalytic transformation of metal complexes, new opportunities are provided to expand the reactivity arsenal of inorganic systems for synthesis and technological applications.
Article
Chemistry, Organic
Pan Zhou, Xinxuan Li, Dong Wang, Tao Xu
Summary: The dual nickel/photoredox-catalyzed enantioselective reductive cross-coupling of aryl halides with CF3-substituted racemic alkyl electrophiles has been developed, allowing access to a variety of chiral CF3-containing compounds. The mild conditions and absence of Grignard reagents or stoichiometric metallic reductants make this transformation highly potential for late-stage functionalization of complex molecules.
Article
Chemistry, Multidisciplinary
Kyungsup Lee, Jordan L. Harper, Tae Hyeon Kim, Hee Chan Noh, Dongwook Kim, Paul Ha-Yeon Cheong, Phil Ho Lee
Summary: Regiodivergent transition metal-catalyzed B(4)- and C(1)-selenylation reactions of o-carboranes have been demonstrated, with Ru(ii)-catalysis selectively generating B(4)-selenylated o-carboranes and Pd(ii) catalysis exclusively providing C(1)-selenylated o-carboranes. DFT studies revealed the contrasting mechanisms of these reactions.
Article
Chemistry, Physical
Juan Bai, Jun Mei, Dongchen Qi, Ting Liao, Ziqi Sun
Summary: For electrocatalytic oxygen evolution reactions (OERs), optimizing the surface microenvironment of nanocatalysts is crucial for enhancing catalytic performance. In this study, molybdenum oxides were used as representative catalysts and boron/nitrogen species were employed as modulators to improve OER activities. It was found that the boron modulator induced the formation of MoO2 phase, while the nitrogen modulator stabilized MoO3 phase. The boron modulator showed better OER performance with a lower overpotential of 298 mV compared to the nitrogen modulator (310 mV) at a current density of 10 mA cm(-2), without significant performance decay for 50 hours. This work provides insights into OLSME engineering and offers possibilities for enhancing activities of inactive metal oxide electrocatalysts.
Article
Chemistry, Multidisciplinary
Mohamad Estaitie, Dennis G. Hall
Summary: The palladium-catalyzed cross-coupling reaction of optically enriched dehydropiperidinyl boronate with cinnamyl carbonates was optimized to minimize stereochemical erosion, providing exclusively linear 2-allylated 3,4-dehydropiperidines with high enantiospecificity using (p-CF3C6H4)(3)P as the ligand.
CHEMICAL COMMUNICATIONS
(2022)
Article
Chemistry, Multidisciplinary
Jun-Jie Tian, Wei Sun, Rui-Rui Li, Gui-Xiu Tian, Xiao-Chen Wang
Summary: A borane/gold(I) co-catalytic system was designed and applied in C-H functionalization reactions and cycloaddition reactions between tertiary amines and alpha-alkynylenones, efficiently introducing a furan ring into the amine molecule.
ANGEWANDTE CHEMIE-INTERNATIONAL EDITION
(2022)
Article
Chemistry, Organic
Anton A. Gladkov, Grigory N. Chernov, Vitalij V. Levin, Vladimir A. Kokorekin, Alexander D. Dilman
Summary: Organozinc reagents can generate alkyl radicals under blue light irradiation with an organic photocatalyst, leading to gem-difluorinated products by trapping the radicals with alpha-(trifluoromethyl)styrenes and eliminating fluoride. The reaction can be conveniently carried out under Barbier conditions starting from organic iodides and bromides and elemental zinc.
Article
Chemistry, Multidisciplinary
Ruitao Jin, Nermina Brljak, Robert Sangrigoli, Tiffany R. Walsh, Marc R. Knecht
Summary: By integrating different materials-binding domains and harnessing biological recognition, the designed BEAM molecule is capable of achieving regiospecific binding to graphene and h-BN surfaces, showing potential in guiding material self-organization in aqueous media.
Article
Chemistry, Multidisciplinary
Ji-Qiang Fan, Kehui Cen, Hua-Jun Xu, Hai-Yang Wang, Ying Yang, Ze-Min Zhu, Hao Liu, Dengyu Chen, Weigang Fan, Man-Bo Li
Summary: This study synthesized four carbonyl metal nanoclusters through a photochemical reduction-oxidation cascade process and compared their catalytic performance. The results showed that these nanoclusters have oxidative resistance and structural stability, and their catalytic activity is dependent on the ring size.
Article
Chemistry, Physical
Carlos Ayestaran Latorre, James P. Ewen, Daniele Dini, M. C. Righi
Summary: Diamond and diamond-like carbon coatings are widely used in various fields, and the hydrophilicity of these surfaces is crucial for their biocompatibility and tribological performance in aqueous environments. Different dopants such as B, N, and O have been studied for their effects on carbon film hydrophilicity, with results showing enhancement of hydrophilicity through different mechanisms, notably through spontaneous chemisorption and increased interaction in H-bond networks by B dopants.
Article
Chemistry, Multidisciplinary
Nicholas A. Phillips, Richard Y. Kong, Andrew J. P. White, Mark R. Crimmin
Summary: A series of linear late transition metal complexes with side-on [B=C](-) containing ligands have been isolated and characterized, with comparison showing deviation in coordination modes. Computational techniques were used to analyze bonding and rationalize impacts on substrate activation. The study provides insight into the catalytic relevance of d(10) complexes of Cu, Ag, and Au, highlighting the role of metal variation in coordination modes and substrate activation.
ANGEWANDTE CHEMIE-INTERNATIONAL EDITION
(2021)
Article
Chemistry, Organic
Fuying Zhu, Yamei Lin
Summary: In this study, a low-metal iron-supported catalyst (Fe20/NC-Mg) was reported for the efficient synthesis of quinoxaline compounds, using water as a solvent and without additional bases. The synergistic effect of FeNx site and Mg (OH)2 nanorods in the catalyst played a key role in achieving high yields (82-91%) in 16 examples. The gram-level synthesis and reusability of the catalysts after four cycles demonstrated its industrial application potential.
Article
Chemistry, Organic
Mikhail Kozlov, Alexey Tyurin, Andrey Dmitrenok, Vyacheslav Rusak, Aleksander Fedorov, Igor Zavarzin, Yulia Volkova
Summary: This study presents a novel and practical synthesis method for phosphorus-substituted 1,3,4-thiadiazolines using phosphorylthioformic acid hydrazides and ketones. The protocol demonstrates operational simplicity, availability of reagents, and tolerance towards different functional groups.
Article
Chemistry, Organic
Jisna Jose, Thomas Mathew
Summary: 2-Cyclopentenone and its derivatives are highly esteemed synthetic intermediates with exceptional utility in organic synthesis. They are favored structural motifs in numerous pharmaceutical drugs and natural products, highlighting their significance. The review discusses the various methods used to synthesize cyclopentenones from 2016 to 2023.
