A visible light-driven photocatalytic generation of sulfonamidyl radicals, and application to intramolecular alkene hydroamination, has been accomplished, providing a mild and efficient approach to various functionalized isoxazolidines. The success of this protocol is based on the strategy of oxidative deprotonation electron transfer by merging the base and the photocatalyst under visible light irradiation, obviating installation of a photolabile handle or stoichiometric external oxidants.
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http://dx.doi.org/10.1039/c7cc09871e | DOI Listing |
Angew Chem Int Ed Engl
January 2025
Beijing Institute of Technology, School of Chemistry and Chemical Engineering, 8th Liangxiang East Road, Room 829, Eco-Industrial Building, Beijing, 102488, Beijing, CHINA.
The structural isomerism of atomically precise nanoclusters provides a preeminent theoretical model to investigate the structure-property relationships. Herein, we synthesized three bowl-like polyoxometalate (POM)-encapsulated Ag nanoclusters (denoted as {Ag14(Sb3W30)2}-1, {Ag14(Sb3W30)2}-1a, and {Ag14(Sb3W30)2}-2) via a facile one-pot solvothermal approach. Among them, for the first time, an unprecedented isomeric {Ag14}10+ nanoclusters are obtained in polyoxoanions {Ag14(Sb3W30)2}-1 and {Ag14(Sb3W30)2}-2, which should be probably induced by the different distribution of coordinating O atoms in two isomeric bowl-like {Sb3W30} ligands.
View Article and Find Full Text PDFACS Cent Sci
January 2025
Jiangsu Key Laboratory of New Drug Research and Clinical Pharmacy, School of Pharmacy, Xuzhou Medical University, 209 Tongshan Road, Xuzhou 221004, China.
Herein, we report a visible-light-induced charge-transfer-complex-enabled dicarboxylation and deuterocarboxylation of C=C bonds with oxalate as a masked CO source under catalyst-free conditions. In this reaction, we disclosed the first example that the tetrabutylammonium oxalate could be able to aggregate with aryl substrates via π-cation interactions to form the charge transfer complexes, which subsequently triggers the single electron transfer from the oxalic dianion to the ammonium countercation under irradiation of 450 nm bule LEDs, releasing CO and CO radical anions. Diverse alkenes, dienes, trienes, and indoles, including challenging trisubstituted olefins, underwent dicarboxylation and anti-Markovnikov deuterocarboxylation with high selectivity to access valuable 1,2- and 1,4-dicarboxylic acids as well as indoline-derived diacids and β-deuterocarboxylic acids under mild conditions.
View Article and Find Full Text PDFJ Colloid Interface Sci
January 2025
International Research Center for Renewable Energy (IRCRE), State Key Laboratory of Multiphase Flow in Power Engineering (MFPE), Xi'an Jiaotong University (XJTU), Xi'an 710049 PR China.
Graphitic carbon nitride (g-CN) has been regarded as highly potential photocatalyst for solar energy utilization. However, the restricted absorption of visible light for pristine g-CN significantly limits the solar-light-driven chemical reaction efficiency. Herein, structurally distorted g-CN nanosheets with awakened n-π* electron transition were successfully synthesized through hexamethylenetetramine (HMTA)-involved supercritical CO (scCO) treatment and following pyrolysis of melamine precursor.
View Article and Find Full Text PDFMolecules
January 2025
Research Group of Environmental and Inorganic Photochemistry, Center for Natural Sciences, Faculty of Engineering, University of Pannonia, P.O. Box 158, H-8201 Veszprém, Hungary.
Graphitic carbon nitride (g-CN) proved to be a promising semiconductor for the photocatalytic degradation of various organic pollutants. However, its efficacy is limited by a fast electron hole recombination, a restricted quantity of active sites, and a modest absorption in the visible range. To overcome these limitations, g-CN-BiS and g-CN-ZnS composites were effectively produced utilizing a starch-assisted technique.
View Article and Find Full Text PDFNanomaterials (Basel)
January 2025
Department of Industrial Engineering, University of Salerno, Via Giovanni Paolo II 132, 84084 Fisciano, Salerno, Italy.
Recently, the extensive use of antibiotics has unavoidably resulted in the discharge of significant quantities of these drugs into the environment, causing contamination and fostering antibiotic resistance. Among various approaches employed to tackle this problem, heterogeneous photocatalysis has emerged as a technique for antibiotic degradation. This study explores the potential of CeO as a photocatalyst for the degradation of chloramphenicol.
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