Results 201 to 210 of about 220,271 (263)

Chronobiology of Cancer: How Aging Fuels Oncogenesis at the Molecular Level

Aging and Cancer, EarlyView.
This graphical abstract illustrates the key biological pathways linking aging with cancer development and progression. In the upper left, cumulative exposure to ultraviolet radiation, toxins, and reactive oxygen species (ROS) causes DNA damage and genomic instability, whereas age‐related decline in repair mechanisms, such as ATM/ATR, BER, and NER ...
Anu Singh, Aroonima Misra, Sufian Zaheer
wiley   +1 more source

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Activation of Inert C—H Bonds

ChemInform, 2004
AbstractFor Abstract see ChemInform Abstract in Full Text.
Fumitoshi Kakiuchi, Naoto Chatani
openaire   +1 more source

Understanding and Exploiting C—H Bond Activation

ChemInform, 2002
AbstractFor Abstract see ChemInform Abstract in Full Text.
Labinger, Jay A., Bercaw, John E.
openaire   +3 more sources

C–H bond activation of ethylene by a zirconacycle

Chemical Communications, 2013
The reaction of C2H4 and β-SiH containing azasilazirconacycle Cp2Zr{κ(2)-N(SiHMe2)SiHMeCH2} (3), formed via a γ-abstraction reaction of Cp2Zr{N(SiHMe2)2}H (1), follows an unusual pathway in which a rare σ-bond metathesis reaction of ethylene generates a vinyl intermediate. That species undergoes a β-hydrogen abstraction under the reaction conditions to
KaKing, Yan, Aaron D, Sadow
openaire   +2 more sources

Metal-catalysed C–H bond activation and borylation

Chemical Society Reviews, 2022
Transition metal-catalysed direct borylation of hydrocarbons via C–H bond activation has received a remarkable level of attention as a popular reaction in the synthesis of organoboron compounds owing to their synthetic versatility.
Ranjana Bisht, Chabush Haldar, Mirja Md Mahamudul Hassan, Md Emdadul Hoque, Jagriti Chaturvedi, Buddhadeb Chattopadhyay   +5 more
openaire   +2 more sources

Iron-Catalyzed C–H Bond Activation

Chemical Reviews, 2017
Catalytic C-H bond activation, which was an elusive subject of chemical research until the 1990s, has now become a standard synthetic method for the formation of new C-C and C-heteroatom bonds. The synthetic potential of C-H activation was first described for ruthenium catalysis and is now widely exploited by the use of various precious metals.
Rui Shang, Laurean Ilies, Eiichi Nakamura   +2 more
openaire   +2 more sources

The Chemistry of CH Bond Activation on Diamond

Chemistry – An Asian Journal, 2010
AbstractThe surface of hydrogen‐terminated diamond resembles a solid hydrocarbon substrate. Interestingly, the CH bonds on the diamond surface are not as unreactive as that of saturated hydrocarbon molecules owing to its unique surface electronic properties.
Yu Lin, Zhong, Kian Ping, Loh
openaire   +2 more sources

Catalytic activation of aromatic CH bonds

Journal of Organometallic Chemistry, 1982
Abstract A new reaction is described, involving oxidative addtion of aromatic bromides to palladium(O), two successive insertions of norbornene, and ring closure to the aromatic carbon ortho to the carbon originally bearing the bromine.
CATELLANI, Marta, CHIUSOLI, Gian Paolo
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Oxygen‐Promoted CH Bond Activation at Palladium

Angewandte Chemie International Edition, 2014
Abstract[Pd(P(Ar)(tBu)2)2] (1, Ar=naphthyl) reacts with molecular oxygen to form PdII hydroxide dimers in which the naphthyl ring is cyclometalated and one equivalent of phosphine per palladium atom is released. This reaction involves the cleavage of both CH and OO bonds, two transformations central to catalytic aerobic oxidizations of hydrocarbons ...
Scheuermann, Margaret L., Boyce, David W., Grice, Kyle A., Kaminsky, Werner, Stoll, Stefan, Tolman, William B., Swang, Ole, Goldberg, Karen I.   +7 more
openaire   +3 more sources