Results 71 to 80 of about 482,822 (233)

Silane- and peroxide-free hydrogen atom transfer hydrogenation using ascorbic acid and cobalt-photoredox dual catalysis

Nature Communications, 2021
Hydrogen atom transfer (HAT) hydrogenation of alkenes usually requires stoichiometric silanes and peroxides. Here, the authors report a silane- and peroxide-free HAT hydrogenation method using a combined cobalt/photoredox catalysis and vitamin C as a ...
Yuji Kamei, Yusuke Seino, Yuto Yamaguchi, Tatsuhiko Yoshino, Satoshi Maeda, Masahiro Kojima, Shigeki Matsunaga   +6 more
doaj   +1 more source

Targeted photoredox catalysis in cancer cells [PDF]

Nature Chemistry, 2019
Hypoxic tumours are a major problem for cancer photodynamic therapy. Here, we show that photoredox catalysis can provide an oxygen-independent mechanism of action to combat this problem. We have designed a highly oxidative Ir(III) photocatalyst, [Ir(ttpy)(pq)CI]PF6 ([1]PF6, where 'ttpy' represents 4'-(p-tolyl)-2,2':6',2 ''-terpyridine and 'pq ...
Huang, Huaiyi, Banerjee, Samya, Qiu, Kangqiang, Zhang, Pingyu, Blacque, Olivier, Malcomson, Thomas, Paterson, Martin J, Clarkson, Guy J, Staniforth, Michael, Stavros, Vasilios G, Gasser, Gilles, Chao, Hui, Sadler, Peter J   +12 more
openaire   +5 more sources

Enantioselective radical chemistry: a bright future ahead

Beilstein Journal of Organic Chemistry
This perspective is focused on enantioselective free radical reactions. It describes several important catalytic asymmetric strategies applied to enantioselective radical reactions, including chiral Lewis acid catalysis, organocatalysis, photoredox ...
Anna C. Renner, Sagar S. Thorat, Hariharaputhiran Subramanian, Mukund P. Sibi   +3 more
doaj   +1 more source

Photoredox catalytic radical fluorosulfonylation of olefins enabled by a bench-stable redox-active fluorosulfonyl radical precursor

Nature Communications, 2022
Sulfonyl fluorides are compounds with potential application in chemical biology and drug discovery, but their preparation can be challenging. Here, the authors present a type of bench-stable fluorosulfonyl radical reagents that enable radical ...
Peng Wang, Honghai Zhang, Xingliang Nie, Tianxiao Xu, Saihu Liao   +4 more
doaj   +1 more source

Mechanisms of Photoredox Catalysis Featuring Nickel–Bipyridine Complexes

ACS Catalysis
Metallaphotoredox catalysis can unlock useful pathways for transforming organic reactants into desirable products, largely due to the conversion of photon energy into chemical potential to drive redox and bond transformation processes.
David A. Cagan, Daniel Bím, Nathanael P. Kazmierczak, Ryan G. Hadt   +3 more
semanticscholar   +1 more source

Targeted activation in localized protein environments via deep red photoredox catalysis

Nature Chemistry, 2021
Technologies for profiling biological environments with high spatiotemporal resolution are in demand to enable the discovery of new targets for addressing unmet clinical needs.
Nicholas E. S. Tay, Keun Ah Ryu, J. Weber, A. Olow, David C. Cabanero, D. Reichman, Rob C. Oslund, O. Fadeyi, T. Rovis   +8 more
semanticscholar   +1 more source

Photosynthesis of Au8Cu6 nanocluster for photocatalysis in oxidative functionalization of alkynes

Nature Communications
Ligand-protected metal nanoclusters provide an ideal platform for investigating photoredox catalysis. The central challenge is balancing their stability and catalytic activity.
Yan Zhao, Ze-Min Zhu, Weigang Fan, Wanli Zhu, Jing-Jing Yang, Yang Tao, Wenwen Fei, Hong Bi, Sheng Zhang, Man-Bo Li   +9 more
doaj   +1 more source

Dual Ni/photoredox-catalyzed asymmetric cross-coupling to access chiral benzylic boronic esters

Nature Communications, 2021
Metallaphototoredox catalysis has been rarely applied to reductive cross-couplings, in contrast to typical redox-neutral methods. Here, the authors report a mild Ni/photoredox-catalyzed reductive cross-coupling of aryl iodides and α-chloroboranes ...
Purui Zheng, Pan Zhou, Dong Wang, Wenhao Xu, Hepan Wang, Tao XU   +5 more
doaj   +1 more source

Recent progress in photocatalytic reactions involving the excitation of electron-primed catalysts

Journal of Photochemistry and Photobiology, 2023
Open-shell species are attracting significant attention owing to their unique physicochemical properties and highly reactive characteristics. Over the past decade, photoredox catalysis (PRC) has emerged as a powerful strategy for radical reactions ...
Takashi Koike
doaj   +1 more source

A De Novo Metalloenzyme for Cerium Photoredox Catalysis

Journal of the American Chemical Society
Cerium photoredox catalysis has emerged as a powerful strategy to activate molecules under mild conditions. Radical intermediates are formed using visible light and simple complexes of the earth-abundant lanthanide.
A. S. Klein, Florian Leiss-Maier, Rahel Mühlhofer, B. Boesen, Ghulam Mustafa, Hannah Kugler, Cathleen Zeymer   +6 more
semanticscholar   +1 more source