Results 61 to 70 of about 4,438 (202)

A modern approach to intermittent illumination for the characterization of chain-propagation in photoredox catalysis

Tetrahedron Chem
Photoredox catalysis has become an invaluable tool for the construction of organic molecules, allowing for unparalleled control over radical intermediates enabled by the mild conditions achieved through visible-light activation of a photocatalyst.
K.A. Viraj Miyuranga, Kaitlin E. Ashcraft, Spencer P. Pitre   +2 more
doaj   +1 more source

Aryl radical-mediated N-heterocyclic carbene catalysis

Nature Communications, 2021
Use of aryl halides as coupling precursors typically occurs through transition metal catalysis and/or photoredox chemistry, which requires some combination of light, metals, and oxidants or reductants.
Yuki Matsuki, Nagisa Ohnishi, Yuki Kakeno, Shunsuke Takemoto, Takuya Ishii, Kazunori Nagao, Hirohisa Ohmiya   +6 more
doaj   +1 more source

Decoupling Redox Potentials and Excited State Energies in Substituted Chromium(III) Chromophores

Chemistry – A European Journal, EarlyView.
Redox and excited state properties of organic and precious metal CT photocatalysts are strongly entangled. In contrast, redox potentials of polypyridine chromium(III) complexes, that feature purely metal‐centered SF states, are selectively tuned by incremental substituent effects of the CF3 group, while excited state energies and lifetimes remain ...
Steven Sittel, Dimitri Zorn, Alexandra König, Jonas Marcel Grenz, Christoph Förster, Robert Naumann, Katja Heinze   +6 more
wiley   +1 more source

Harnessing Toluene Solvent as a Reactant: Regioselective Benzyl Radical Addition to Multi‐π 1,5‐Enynes in a Copper‐Catalyzed Cascade to Indenes

Chemistry – A European Journal, EarlyView.
A copper‐catalyzed three‐component radical cascade of 1,5‐enynes with toluene and benzoic acids enables regioselective benzyl radical addition to multi‐Π systems, efficiently delivering polysubstituted indenes from an abundant solvent feedstock. ABSTRACT C─H activation of toluene generates a benzyl radical that undergoes C─C coupling, converting an ...
Saideh Rajai‐Daryasarei, Fatemeh Chahardehi, Mohammad Mahdi Sharifani, Morteza Jamshidi, Robert Stranger, Frank Rominger, Alireza Ariafard, Saeed Balalaie   +7 more
wiley   +1 more source

Double-shelled hollow rods assembled from nitrogen/sulfur-codoped carbon coated indium oxide nanoparticles as excellent photocatalysts

Nature Communications, 2019
While photoredox catalysis presents exciting avenues for molecular transformations, balancing optimal photochemical and materials properties can be challenging. Here, the authors prepare carbon-coated In2O3 nanoparticles as recoverable photocatalysts for
Liming Sun, Rong Li, Wenwen Zhan, Yusheng Yuan, Xiaojun Wang, Xiguang Han, Yanli Zhao   +6 more
doaj   +1 more source

Late‐Stage Phenylation From [13C6] and [2H5]Benzene: A Versatile Tool for Stable Isotope Labeled MS Standards

Chemistry – A European Journal, EarlyView.
ABSTRACT We explored aryl thianthrenation as a tool for directly incorporating multiple isotopes into molecular scaffolds starting from full isotopically labeled benzene. Stable isotope‐labeled (SIL) molecules are indispensable tools for investigating chemical and biological mechanisms and quantifying metabolites.
Alexandre Labiche, Bouchaib Mouhsine, Dorian Dupommier, Louise Fogel, Frédéric Robert, David‐Alexandre Buisson, Frédéric Taran, Davide Audisio   +7 more
wiley   +1 more source

Organopolymer with dual chromophores and fast charge-transfer properties for sustainable photocatalysis

Nature Communications, 2019
While photoredox catalysis offers a new dimension to chemical synthesis, there are few heterogeneous organocatalysts for metal-free transformations.
Justin D. Smith, Abdelqader M. Jamhawi, Jacek B. Jasinski, Fabrice Gallou, Jin Ge, Rigoberto Advincula, Jinjun Liu, Sachin Handa   +7 more
doaj   +1 more source

Synthesis of 1‐Alkynylboronates, 1,1‐Diborylalkenes, and 1,1,1‐Triborylalkanes: Challenges and Opportunities

Chemistry – A European Journal, EarlyView.
ABSTRACT In the field of organoboron chemistry, multi(boronate) esters have emerged as crucial intermediates, with various applications in synthetic chemistry, material technology, and life sciences. This mini‐review discusses recent advancement in the synthesis of these versatile compounds, particularly alkynylboronates, 1,1‐diborylalkenes, and 1,1,1 ...
Son Hoai Doan, Vu Nguyen Tran, Thanh Vinh Nguyen   +2 more
wiley   +1 more source

Enantioselective benzylic C–H arylation via photoredox and nickel dual catalysis

Nature Communications, 2019
Chiral 1,1-diaryl alkanes are important targets in pharmaceutical industry. Here, the authors report report a redox-neutral enantioselective benzylic C−H bond arylation via photoredox/nickel dual catalysis accessing chiral 1,1-diarylalkane compounds ...
Xiaokai Cheng, Huangzhe Lu, Zhan Lu
doaj   +1 more source

β‐Scission of Tertiary Alcohols on a Platinum‐Loaded Titanium Dioxide Photocatalyst for C─C Bond‐Forming Reactions

Chemistry – A European Journal, EarlyView.
A strategy for the Pt/TiO2‐photocatalyzed β‐scission of nonactivated 3° alcohols in the absence of external oxidants and additives was developed. A wide variety of C‐centered radicals were generated and subsequently engaged in C─C bond‐forming reactions.
Shu Sakurai, Sha Xue, Shogo Mori, Susumu Saito   +3 more
wiley   +1 more source