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Photocatalytic → isomerization of -bromofluoroalkenes: stereoselective synthesis of β-fluorostyrene derivatives.
Org Biomol Chem
January 2025
Department of Applied Chemistry, Faculty of Fundamental Engineering, Nippon Institute of Technology, 4-1 Gakuendai, Miyashiro-machi, Minamisaitama-gun, Saitama 345-8501, Japan.
Stereoselective synthesis of β-fluorostyrene derivatives has been achieved. Selective isomerization of -bromofluoroalkenyl benzenes bearing various -substituents is enabled by using Ir photocatalysts with high triplet energy. Subsequent one-pot transition-metal (TM)-catalyzed reactions enable pot-economical synthesis of monofluoroalkenes in a stereoselective manner.
View Article and Find Full Text PDFTracking the Geometric and Positional Isomerization of Lipid C═C Bonds in the Bacterial Stress Responses by Mass Spectrometry.
Anal Chem
January 2025
The Institute for Advanced Studies, Wuhan University, Wuhan, Hubei 430072, China.
The position and configuration of the C═C bond have a significant impact on the spatial conformation of unsaturated lipids, which subsequently affects their biological functions. Double bond isomerization of lipids is an important mechanism of bacterial stress response, but its in-depth mechanistic study still lacks effective analytical tools. Here, we developed a visible-light-activated dual-pathway reaction system that enables simultaneous [2 + 2] cycloaddition and catalytic - isomerization of the C═C bond of unsaturated lipids via directly excited anthraquinone radicals.
View Article and Find Full Text PDFSingle GAF domain phytochrome exhibits a pH-dependent shunt on the millisecond timescale.
Chemphyschem
January 2025
Goethe-Universität Frankfurt am Main, Physical and Theoretical Chemistry, Max von Laue-Straße 7, 60438, Frankfurt am Main, GERMANY.
The light-sensing activity of phytochromes is based on the reversible light-induced switching between two isomerization states of the bilin chromophore. These photo-transformations may not necessarily be only unidirectional, but could potentially branch back to the initial ground state in a thermally driven process termed shunt. Such shunts have been rarely reported, and thus our understanding of this process and its governing factors are limited.
View Article and Find Full Text PDFPhotoinduced Reductive C-O Couplings from Unsymmetrical Bis-Cyclometalated Pt(IV) Dicarboxylato Complexes.
Inorg Chem
December 2024
Departamento de Química Inorgánica, Facultad de Química, Universidad de Murcia, Campus de Espinardo 19, Murcia 30100, Spain.
Unsymmetrical bis-cyclometalated dicarboxylato complexes (-6-32)-[Pt(tpy)(OCR)] [tpy = cyclometalated 2-(-tolyl)pyridine, R = -Bu (), Me (), Ph (), CF ()], are obtained from the reaction of -[Pt(tpy)] with the appropriate PhI(OCR) reagent. Treatment of complexes of this type with different carboxylates (R'CO) results in the formation of mixed-carboxylato derivatives, namely (-6-43)-[Pt(tpy)(OCMe)(OCR')] [R' = -Bu (), CF (), Ph ()], (-6-34)-[Pt(tpy)(OCCF)(OCR')] [R' = -Bu (), Me (), Ph ()], and (-6-34)-[Pt(tpy)(OC--Bu)(OCMe)] (). Irradiation of - and - with UV light (365 nm) in MeCN gives 5-methyl-2-(2-pyridyl)phenyl pivalate (), 5-methyl-2-(2-pyridyl)phenyl acetate () or 5-methyl-2-(2-pyridyl)phenyl benzoate () as the major photoproduct from most complexes, resulting from a reductive C-O coupling between a tpy ligand and a carboxylato ligand.
View Article and Find Full Text PDFand : Potential Therapeutic Targets for Gastric Cancer.
Discov Med
December 2024
Department of Oncology, The Affiliated Changzhou No.2 People's Hospital of Nanjing Medical University, 213003 Changzhou, Jiangsu, China.
Background: Detecting and treating stomach cancer requires a comprehensive understanding of how gastric cancer develops and progresses. In this context, efforts have been made to elucidate the regulation of glutamine-fructose-6-phosphate transaminase 1 () and Lysine demethylase 4C () in gastric cancer.
Methods: Bioinformatics was utilized to predict the levels and correlation of and in gastric cancer, followed by determining their expressions via quantitative real-time polymerase chain reaction (qRT-PCR).
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