Article
Chemistry, Organic
Francisco A. Martins, Lucas de Azevedo Santos, Daniela Rodrigues Silva, Celia Fonseca Guerra, F. Matthias Bickelhaupt, Matheus P. Freitas
Summary: The gauche conformer in 1-X,2-Y-disubstituted ethanes is only favored for relatively small substituents, while the anti conformer is generally favored for larger substituents. In 2-iodoethanol, the gauche conformer is preferred when the hydroxyl hydrogen is oriented toward the iodine atom.
JOURNAL OF ORGANIC CHEMISTRY
(2022)
Article
Chemistry, Physical
Daniela Rodrigues Silva, Lucas de Azevedo Santos, Trevor A. Hamlin, Celia Fonseca Guerra, Matheus P. Freitas, F. Matthias Bickelhaupt
Summary: The study reveals that the gauche conformation of 1,2-dihaloethanes is favored by the interplay of hyperconjugation and Pauli repulsion. As the halogen atoms increase in size, the steric Pauli repulsion becomes strong enough to override the preference for the gauche conformation, shifting the energetic preference towards the anti conformation.
Article
Chemistry, Physical
Yujing Guo, Chao Pei, Sripati Jana, Rene M. Koenigs
Summary: Trifluoromethylated aziridines are important strategic building blocks with broad applications in drug discovery. This study demonstrates that iodinanes can release a nitrene radical anion in the presence of a simple Ru(bpy)(3)Cl-2 catalyst, allowing for direct aziridination reactions of fluorinated olefins.
Article
Chemistry, Multidisciplinary
Patrick Proehm, Willi R. Berg, Susanne M. Rupf, Patrick Vossnacker, Sebastian Riedel
Summary: This study systematically investigates halogenate (I/III) anions with polyatomic ligands, preparing new halogenate (I) compounds and analyzing their physicochemical properties. Additionally, the oxidation of halogenate (I) compounds to corresponding halogenate (III) derivatives is explored, revealing potential applications of the inert halogenate (III) anions.
CHEMISTRY-A EUROPEAN JOURNAL
(2021)
Article
Chemistry, Multidisciplinary
Laurent Soulere
Summary: This study presented a molecular modeling analysis for undergraduate students using VEGA ZZ software to perform systematic conformational searches on small molecules. The conformational analyses of n-butane, buta-1,3-diene, ethane-1,2-diol, cyclic acetal, and N-acetyl-N'-methyl-L-alanylamide highlighted various conformational features and effects, showcasing the importance of torsion angles in molecular structures.
JOURNAL OF CHEMICAL EDUCATION
(2021)
Article
Environmental Sciences
Xiaonan Wang, Qingpeng Lu, Leina Dou, Minggang Liu, Peipei Li, Wenbo Yu, Xuezhi Yu, Zhanhui Wang, Kai Wen
Summary: Long-term dietary exposure to aristolochic acids (AAs)-contaminated food is a major cause of Endemic Nephropathy, renal failure, and urothelial cancer. In this study, a broad-specificity monoclonal antibody (mAb) 5H5 with high affinity for AAs was prepared using computational chemistry. The mAb 5H5 showed strong inhibitory concentrations for various types of AAs. Molecular docking explained the broad-specificity profile of mAb 5H5 by showing that multiple conformations of AAs can bind to the antibody. The ELISA based on mAb 5H5 showed promising results in detecting AAs in flour and soil samples.
SCIENCE OF THE TOTAL ENVIRONMENT
(2023)
Article
Biochemistry & Molecular Biology
Angel J. Ruiz-Moreno, Atilio Reyes-Romero, Alexander Domling, Marco A. Velasco-Velazquez
Summary: The study used a computational approach to design new potential CD44 antagonists and identified two compounds that may block CD44, potentially serving as novel anti-cancer therapies. These compounds can be easily synthesized for activity testing and may aid in the development of more potent CD44 antagonists.
Article
Chemistry, Physical
Mario Bracker, Mira K. Kubitz, Constantin Czekelius, Christel M. Marian, Martin Kleinschmidt
Summary: This study aims to find fluorinated flavin derivatives with modified intersystem crossing (ISC) and fluorescence properties. Photophysical properties of 8 derivatives were investigated computationally, and the excited-state decay mechanisms of selected chromophores were studied. Two promising chromophores for fluorescence microscopy were identified, but nonradiative deactivation of fluorescence by internal conversion (IC) appears to be a problem.
Article
Mathematics, Applied
Muhammad Hassan, Yvon Maday, Yipeng Wang
Summary: This article addresses the issue of well-posedness in the electronic structure theory based on the coupled cluster method. By introducing the non-singularity of the CC derivative, we prove that the continuous and discrete CC equations are locally well-posed under certain assumptions, and derive error estimates. Preliminary numerical experiments show that our obtained constants are better than those obtained from existing methods.
NUMERISCHE MATHEMATIK
(2023)
Review
Biochemistry & Molecular Biology
Davide Bassani, Stefano Moro
Summary: The use of computational approaches in drug discovery, known as computer-aided drug design (CADD), has become a crucial component in pharmaceutical discovery pipelines. CADD techniques have significantly improved the efficiency of early discovery steps, facilitating the selection of appropriate compounds from a vast chemical space. Furthermore, CADD methods rationalize the biochemical and interactive processes at the molecular level, allowing for rational 3D design and optimization of chemical entities. This review provides an overview of CADD methods, highlighting their potential applications, benefits, limitations, and weaknesses in various scenarios of pharmaceutical and biological interest.
Article
Chemistry, Organic
Francesca Franco, Sara Meninno, Alessandra Lattanzi, Alessandra Puglisi, Maurizio Benaglia
Summary: A continuous flow approach was developed for the synthesis of alpha-trifluoromethylthiolated esters and amides using commercially available arylacetic acids and N-(trifluoromethylthio)phthalimide as the electrophilic reagent. The telescoped process resulted in good overall yield and short reaction times for the formation of alpha-substituted SCF3 amides and esters.
JOURNAL OF ORGANIC CHEMISTRY
(2021)
Article
Chemistry, Physical
Vinicius C. Port, Rodrigo A. Cormanich
Summary: This study reexamined the conformational preferences of 1,2-difluoroethane (DFE) and its chlorine and bromine derivatives through a comparative approach, finding that hyperconjugation is the main driving force behind their conformational preferences. Electrostatics was found to be negligible, while steric effects played a minor role in general.
PHYSICAL CHEMISTRY CHEMICAL PHYSICS
(2021)
Review
Biochemistry & Molecular Biology
Darren R. Flower
Summary: The underperformance of the pharmaceutical discovery process is mainly due to profit-driven rather than society-driven search for new pharmaceutical products. Insufficient funding and lack of systematic approaches result in underuse of innovative methods and limitations of dominant methodologies. To fully capitalize on the potential of pharmaceutical intervention, a fundamental shift in attitude towards reliance on computational approaches and moving away from commercial imperatives is essential.
Article
Chemistry, Applied
Heidi Klem, Martin McCullagh, Robert S. Paton
Summary: Understanding enzymatic mechanisms is crucial for biologics development and enzyme design; Quantum mechanical potentials aid in studying complex enzymatic mechanisms; Dynamic interconversion of enzyme conformations poses challenges for computational models; Structural clustering bridges molecular dynamics and catalysis models effectively.
TOPICS IN CATALYSIS
(2022)
Article
Materials Science, Ceramics
Shingo Urata, Nobuhiro Nakamura, Tomofumi Tada, Hideo Hosono
Summary: In order to extend the capacity of long-distance optical fiber communication, further attenuation of Rayleigh scattering in silica glass is necessary. Research has shown that co-doping with alumina and fluorine can reduce density fluctuations in silica glass, but may not be sufficient to completely attenuate Rayleigh scattering. It was observed that increasing alumina doping at high levels can actually increase density fluctuations in silica glass.
JOURNAL OF THE AMERICAN CERAMIC SOCIETY
(2021)
Article
Chemistry, Inorganic & Nuclear
Giacomo Cioncoloni, Hans M. Senn, Stephen Sproules, Claire Wilson, Mark D. Symes
DALTON TRANSACTIONS
(2016)
Article
Chemistry, Physical
G. Rugg, H. M. Senn
PHYSICAL CHEMISTRY CHEMICAL PHYSICS
(2017)
Article
Multidisciplinary Sciences
Isolda Roger, Claire Wilson, Hans M. Senn, Stephen Sproules, Mark D. Symes
ROYAL SOCIETY OPEN SCIENCE
(2017)
Article
Chemistry, Multidisciplinary
Yann Trolez, Aaron D. Finke, Fabio Silvestri, Filippo Monti, Barbara Ventura, Corinne Boudon, Jean-Paul Gisselbrecht, W. Bernd Schweizer, Jean-Pierre Sauvage, Nicola Armaroli, Francois Diederich
CHEMISTRY-A EUROPEAN JOURNAL
(2018)
Article
Chemistry, Organic
Verena Klaus, Stephane Wittmann, Hans M. Senn, J. Stephen Clark
ORGANIC & BIOMOLECULAR CHEMISTRY
(2018)
Article
Chemistry, Physical
Ross J. Marshall, Ciaran T. Lennon, Andi Tao, Hans M. Senn, Claire Wilson, David Fairen-Jimenez, Ross S. Forgan
JOURNAL OF MATERIALS CHEMISTRY A
(2018)
Article
Chemistry, Organic
Martyn C. Henry, Hans Martin Senn, Andrew Sutherland
JOURNAL OF ORGANIC CHEMISTRY
(2019)
Article
Chemistry, Multidisciplinary
Finlay Walton, John Bolling, Andrew Farrell, Jamie MacEwen, Christopher D. Syme, Mario Gonzalez Jimenez, Hans M. Senn, Claire Wilson, Gianfelice Cinque, Klaas Wynne
JOURNAL OF THE AMERICAN CHEMICAL SOCIETY
(2020)
Article
Chemistry, Multidisciplinary
Laura Pala, Hans M. Senn, Stuart T. Caldwell, Tracy A. Prime, Stefan Warrington, Thomas P. Bright, Hiran A. Prag, Claire Wilson, Michael P. Murphy, Richard C. Hartley
FRONTIERS IN CHEMISTRY
(2020)
News Item
Chemistry, Multidisciplinary
Hans Martin Senn
Summary: The study demonstrates the feasibility of using a native carbonic anhydrase to catalyze the transfer hydrogenation of ketones with silanes, providing new insights for enzyme design and engineering.
Article
Multidisciplinary Sciences
Mario Gonzalez-Jimenez, Trent Barnard, Ben A. Russell, Nikita V. Tukachev, Uros Javornik, Laure-Anne Hayes, Andrew J. Farrell, Sarah Guinane, Hans M. Senn, Andrew J. Smith, Martin Wilding, Gregor Mali, Motohiro Nakano, Yuji Miyazaki, Paul McMillan, Gabriele C. Sosso, Klaas Wynne
Summary: It has been discovered that the boson peak in glasses, which is an excess in heat capacity or an additional peak in the terahertz vibrational spectrum, can be isolated in liquids of highly symmetric molecules using depolarized Raman scattering. This peak is linked to the formation of clusters consisting of about 20 molecules. These findings represent a significant step toward understanding the physics of vitrification.
NATURE COMMUNICATIONS
(2023)
Correction
Multidisciplinary Sciences
Mario Gonzalez-Jimenez, Trent Barnard, Ben A. Russell, Nikita V. Tukachev, Uros Javornik, Laure-Anne Hayes, Andrew J. Farrell, Sarah Guinane, Hans M. Senn, Andrew J. Smith, Martin Wilding, Gregor Mali, Motohiro Nakano, Yuji Miyazaki, Paul McMillan, Gabriele C. Sosso, Klaas Wynne
NATURE COMMUNICATIONS
(2023)
Article
Chemistry, Multidisciplinary
Ben A. Russell, Mario Gonzalez-Jimenez, Nikita V. Tukachev, Laure-Anne Hayes, Tajrian Chowdhury, Uros Javornik, Gregor Mali, Manlio Tassieri, Joy H. Farnaby, Hans M. Senn, Klaas Wynne
Summary: This study discovered a single-component homogeneous molecular liquid that exhibits two comparable glass transitions, one associated with dynamic arrest of liquid properties and the other associated with the freezing out of intramolecular degrees of freedom.
JOURNAL OF THE AMERICAN CHEMICAL SOCIETY
(2023)
Article
Chemistry, Physical
Mario Gonzalez-Jimenez, Gopakumar Ramakrishnan, Nikita V. Tukachev, Hans M. Senn, Klaas Wynne
Summary: Research indicates that low-frequency vibrations of G-quadruplexes may have an impact on the biological function of DNA, and G-quadruplexes exhibit modes at a higher frequency than B-DNA, suggesting that changes in molecular stiffness alter its vibrational profile.
PHYSICAL CHEMISTRY CHEMICAL PHYSICS
(2021)
Article
Biochemistry & Molecular Biology
Maria M. Shchepinova, Andrew G. Cairns, Tracy A. Prime, Angela Logan, Andrew M. James, Andrew R. Hall, Sara Vidoni, Sabine Arndt, Stuart T. Caldwell, Hiran A. Prag, Victoria R. Pell, Thomas Krieg, John F. Mulvey, Pooja Yadav, James N. Cobley, Thomas P. Bright, Hans M. Senn, Robert F. Anderson, Michael P. Murphy, Richard C. Hartley
CELL CHEMICAL BIOLOGY
(2017)
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.