Article
Materials Science, Multidisciplinary
Sijia Huang, Steven M. Adelmund, Pradip S. Pichumani, Johanna J. Schwartz, Yigit Menguc, Maxim Shusteff, Thomas J. Wallin
Summary: Seamless multimaterial construction is common in animal physiology but difficult to reproduce in engineered systems. This study introduces a photothermal reaction scheme that can produce multimaterials by altering the microstructure of a single resin, resulting in a diverse range of mechanical properties and modulus gradients.
Article
Chemistry, Organic
Xingchun Sun, Zhiyuan Chen, Rui Yang, Mei Wang, Xiufang Wang, Qi Zhang, Guozhi Xiao
Summary: This study achieved the first stereoselective one-pot synthesis of the icosasaccharide motif of EPS-1A glycan from Cordyceps sinensis. The synthetic approach showed high stereoselectivity and efficiently assembled the target icosasaccharide through different strategies.
Article
Chemistry, Multidisciplinary
Tingyu Hua, Shanshan Li, Ling Wang, Wei Yan
Summary: In this study, three strains with high adaptability and different degrading characteristics to MTBE were cultured, and kinetic models were established to simulate the biodegradation process of MTBE by the strains at different concentrations. The study found that a mixed consortium of the three strains significantly enhanced the removal efficiency and rate of MTBE, especially at high concentrations. Furthermore, the mixed consortium showed strong adaptability and effectively removed other gasoline components. This research provides support for the use of a mixed consortium to remediate MTBE-contaminated environments.
APPLIED SCIENCES-BASEL
(2023)
Article
Chemistry, Physical
Janne M. Naapuri, Gustav A. Aberg, Jose M. Palomo, Jan Deska
Summary: The one-pot combination of halogenation biocatalysis and Suzuki-type cross coupling enables the direct arylative cyclization of allenic alcohols with boronic acids. A novel heterogeneous nanobiohybrid was developed, consisting of an oxidase matrix hosting small spherical palladium nanoparticles, exhibiting catalytic competence for both the biocyclization as well as the C-C bond-forming cross coupling, underlining the potential of this new techniques for streamlining chemoenzymatic approaches.
Article
Chemistry, Multidisciplinary
Rodolpho Alessandro Nesta Silva, Sergio Antonio Marques Lima, Pedro Ivo da Silva Maia, Marian Rosaly Davolos, Ana Maria Pires
Summary: In this short communication, a friendly synthetic route for a new crown-ether, DB18C4, was developed, yielding the desired product in high yields (up to 80%) after purification steps. The molecule was fully characterized using various spectroscopic and spectrometric methods, with the structure confirmed via SCXRD to be in the Pnma Space Group, same as other similar crown-ethers.
RESULTS IN CHEMISTRY
(2021)
Article
Chemistry, Organic
Vani Verma, Laurel L. Schafer
Summary: This article describes a one-pot general method for the selective synthesis of less explored/challenging patterns of tri-substituted pyridines. Hydroamination of alkynes with commercially available N-triphenylsilylamine generates N-silylenamines, which, upon reaction with alpha, beta-unsaturated carbonyl compounds and subsequent oxidation, provide 25 examples of selectively substituted 2,4,5-, 2,3,4-, 3,4,5-, 2,3,5-, and 2,3,6-trisubstituted pyridines in up to 78% yield. The reaction exhibits high functional group compatibility and offers an expeditious and general approach for the assembly of selectively substituted trisubstituted pyridine derivatives. The robustness and practicality of the reaction have been demonstrated in a gram-scale reaction.
JOURNAL OF ORGANIC CHEMISTRY
(2023)
Article
Chemistry, Organic
Vani Verma, Laurel L. Schafer
Summary: This paper describes a selective synthesis method for tri-substituted pyridines. The hydroamination of alkynes with commercially available N-triphenylsilylamine generates N-silylenamines, which upon reaction with alpha, beta-unsaturated carbonyl compounds and subsequent oxidation, produces selectively substituted 2,4,5-, 2,3,4-, 3,4,5-, 2,3,5-, and 2,3,6-trisubstituted pyridines in up to 78% yield. The reaction shows high functional group compatibility and provides an efficient and general approach for selectively assembling trisubstituted pyridine derivatives.
JOURNAL OF ORGANIC CHEMISTRY
(2023)
Article
Chemistry, Organic
Bingjia Yan, Wenyi Li, Christian P. R. Hackenberger
Summary: This report introduces a novel building block for solid phase synthesis of beta-linked O-GlcNAcylated peptides, which carries acid labile silyl ether protecting groups. These protecting groups can be easily removed under TFA-mediated peptide cleavage conditions, leading to fewer synthetic steps and no intermediate purification compared to other protecting group strategies.
ORGANIC & BIOMOLECULAR CHEMISTRY
(2021)
Article
Chemistry, Physical
Yong Li, Hao Li, Jun Wu, Xinyue Yang, Xiaohua Jia, Jin Yang, Dan Shao, Lei Feng, Sizhe Wang, Haojie Song
Summary: This article introduces a durable superhydrophobic photothermal coating that can rapidly melt ice through photothermal conversion and prevent contamination and refreezing through self-cleaning properties.
APPLIED SURFACE SCIENCE
(2022)
Article
Chemistry, Organic
Zhao-Dan Chen, Wen-Ke Xu, Jia-Ming Guo, Ling Chen, Bang-Guo Wei, Chang-Mei Si, Guo-Qiang Lin
Summary: This novel approach demonstrates high yields, simple operation under mild reaction conditions, the use of inexpensive Lewis acid, and high diastereoselectivities in the synthesized products.
JOURNAL OF ORGANIC CHEMISTRY
(2021)
Article
Chemistry, Multidisciplinary
Emine Kaya Ekinci
Summary: This study investigated the adsorption performance of mesoporous magnesia and commercial adsorbent on MTBE, showing high adsorption capacity. The Langmuir isotherm model and pseudo-second-order kinetics fitted well to predict the adsorption behavior, and the re-use of mesoporous magnesia demonstrated good performance.
SEPARATION SCIENCE AND TECHNOLOGY
(2022)
Article
Chemistry, Organic
Antonio Arcadi, Andrea Calcaterra, Giancarlo Fabrizi, Andrea Fochetti, Antonella Goggiamani, Antonia Iazzetti, Federico Marrone, Giulia Mazzoccanti, Andrea Serraiocco
Summary: In this study, a highly efficient method for the synthesis of functionalized 3,4-dihydroquinolin-2-one nuclei was developed. The reaction involved the sequential reaction of readily available N-Ts-o-aminobenzyl alcohols with 5-substituted Meldrum's acid derivatives under mild basic conditions. The synthesis of 3-substituted-4-phenyl-1-tosyl-3,4-dihydroquinolin-2(1H)-ones with high diastereoselectivity was also achieved using the same reaction conditions. The proposed reaction mechanism involves the in situ generation of aza-o-QMs followed by the conjugate addition of enolate, cyclization, and elimination of acetone and CO2.
ORGANIC & BIOMOLECULAR CHEMISTRY
(2022)
Article
Chemistry, Analytical
Fariba Abbasi, Abooalfazl Azhdarpoor, Mohammad Reza Samaei
Summary: This study aimed to remove high concentrations of MTBE using isolated bacteria from contaminated soil with petroleum compounds in southern regions of Iran and determine their kinetics. The results showed that pure Ochrobactrum sp. and a microbial consortium consisting of resistant bacteria at high MTBE concentrations could remove MTBE> 90%.
INTERNATIONAL JOURNAL OF ENVIRONMENTAL ANALYTICAL CHEMISTRY
(2022)
Article
Chemistry, Physical
Yoshinao Nakagawa, Hiroki Hayasaka, Takehiro Asano, Masazumi Tamura, Kazu Okumura, Keiichi Tomishige
Summary: The direct synthesis of dioctyl ether by catalytic reduction was investigated using different supported catalysts. The combination of Pd with W on a rutile TiO2 support showed the highest yield of dioctyl ether. The catalytic activity depended on the W loading amount, and a high coverage of W was necessary for good yield. The deactivated catalyst showed no significant difference in characterization compared to the fresh one.
MOLECULAR CATALYSIS
(2022)
Review
Environmental Sciences
T. Hua, J. Feng, S. Li, W. Yan
Summary: The extensive use of methyl tert-butyl ether (MTBE) as a gasoline additive has caused global environmental pollution. The development of technology for MTBE removal is essential due to its persistent pollution and potential toxicity. This paper provides a comprehensive overview of the mechanism and application of the adsorption and oxidation combined process for MTBE removal. The materials commonly used in this process, such as zeolite and activated carbon, are compared, and their physical and chemical properties and functions are explored. The effects of pretreatment mechanisms and acid reagents are discussed, along with various conditions impacting the removal efficiency.
INTERNATIONAL JOURNAL OF ENVIRONMENTAL SCIENCE AND TECHNOLOGY
(2023)
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.
