Results 51 to 60 of about 205,731 (373)

Enzymatic functionalization of carbon-hydrogen bonds [PDF]

, 2011
The development of new catalytic methods to functionalize carbon–hydrogen (C–H) bonds continues to progress at a rapid pace due to the significant economic and environmental benefits of these transformations over traditional synthetic methods.
Arnold, Frances H., Coelho, Pedro S., Lewis, Jared C.   +2 more
core   +1 more source

Combined Multistate and Kohn-Sham Density Functional Theory Studies of the Elusive Mechanism of N-Dealkylation of N,N-Dimethylanilines Mediated by the Biomimetic Nonheme Oxidant FeIV(O)(N4Py)(ClO4)2

Frontiers in Chemistry, 2018
The oxidative C-H bond activation mediated by heme and nonheme enzymes and related biomimetics is one of the most interesting processes in bioinorganic and oxidative chemistry.
Lili Yang, Xin Chen, Zexing Qu, Jiali Gao, Jiali Gao   +4 more
doaj   +1 more source

Synthesis of a terminal Ce(iv) oxo complex by photolysis of a Ce(iii) nitrate complex. [PDF]

, 2017
Reaction of [Ce(NR2)3] (R = SiMe3) with LiNO3 in THF, in the presence of 2,2,2-cryptand, results in the formation of the Ce(iii) "ate" complex, [Li(2,2,2-cryptand)][Ce(κ2-O2NO)(NR2)3] (1) in 38% yield. Photolysis of 1 at 380 nm affords [Li(2,2,2-cryptand)
Assefa, Mikiyas K, Hayton, Trevor W, Wu, Guang   +2 more
core   +1 more source

Selective hydrogen atom abstraction from dihydroflavonol is the key step in the flavonol synthesis enzyme and avoids by-products.

Journal of the American Chemical Society, 2019
The plant nonheme iron dioxygenase flavonol synthase performs a regioselective desaturation reaction as part of the biosynthesis of the signaling molecule flavonol that triggers the growing of leaves and flowers. These compounds also have health benefits
Sidra Ghafoor, A. Mansha, S. D. de Visser   +2 more
semanticscholar   +1 more source

Atomic scissors: a new method of tracking the 5-bromo-2'-deoxyuridine-labeled DNA in situ. [PDF]

PLoS ONE, 2012
A new method of the light microscopy detection of BrdU-labeled DNA in situ is described. It is based on the oxidative attack at the deoxyribose moiety by copper(I) in the presence of oxygen, which leads to the abstraction of hydrogen atom from ...
Anna Ligasová, Dmytro Strunin, Radek Liboska, Ivan Rosenberg, Karel Koberna   +4 more
doaj   +1 more source

A high-resolution infrared spectroscopic investigation of the halogen atom-HCN entrance channel complexes solvated in superfluid helium droplets [PDF]

, 2006
Rotationally resolved infrared spectra are reported for the X-HCN (X = Cl, Br, I) binary complexes solvated in helium nanodroplets. These results are directly compared with that obtained previously for the corresponding X-HF complexes [J. M.
Balakrishnan, Boltnev, Boltnev, Boys, Brink, Brown, Brown, Cacace, Chase, Jr, Chen, Choi, Curtiss, de Juan, Decker, Deskevich, Douberly, Douberly, Draeger, Fishchuk, Fishchuk, Fishchuk, Frosh, Frost, Goldschleger, Gordon, Gordon, Gordon, Gordon, Harding, Harren, Heaven, Hinds, Hunt, Hunt, Hutson, Jaccarino, Jeremy M. Merritt, Jochen Küpper, Klos, Klos, Knuth, Kreher, Kreher, Küpper, Lefebvre-Brion, Legon, Legon, LeRoy, Lester, Madeja, Maierle, McInnis, Merritt, Merritt, Merritt, Merritt, Merritt, Metz, Meuwly, Meuwly, Misochko, Nauta, Nauta, Nauta, Nauta, Nauta, Nicklass, Peterson, Pfeiffer, Rode, Roger E. Miller, Rudić, Sims, Skouteris, Stienkemeier, Tao, Towsend, Troya, Vissers, von Haeften, Weck, Werner, Zdanska, Zeimen, Zeimen, Zhang   +85 more
core   +3 more sources

A globally accurate potential energy surface and quantum dynamics calculations on the Be(1S) + H2(v0 = 0, j0 = 0) → BeH + H reaction

Frontiers in Physics, 2022
The reactive collision between Be atom and H2 molecule has received great interest both experimentally and theoretically due to its significant role in hydrogen storage, astrophysics, quantum chemistry and other fields, but the corresponding dynamics ...
Zijiang Yang, Maodu Chen
doaj   +1 more source

Rapid Acceleration of Hydrogen Atom Abstraction Reactions of OH at Very Low Temperatures through Weakly Bound Complexes and Tunneling.

Accounts of Chemical Research, 2018
A generally accepted principle of chemical kinetics is that a reaction will be very slow at low temperatures if there is an activation barrier on the potential energy surface to form products.
D. Heard
semanticscholar   +1 more source

Theoretical studies of a hydrogen abstraction tool for nanotechnology [PDF]

, 1991
In the design of a nanoscale, site-specific hydrogen abstraction tool, the authors suggest the use of an alkynyl radical tip. Using ab initio quantum-chemistry techniques including electron correlation they model the abstraction of hydrogen from ...
Goddard, William A., III, Merkle, Ralph C., Musgrave, Charles B., Perry, Jason K.   +3 more
core   +1 more source

Sulfate radical anion-induced benzylic oxidation of N-(arylsulfonyl)benzylamines to N-arylsulfonylimines

Beilstein Journal of Organic Chemistry, 2023
A mild, operationally convenient, and practical method for the synthesis of synthetically useful N-arylsulfonylimines from N-(arylsulfonyl)benzylamines using K2S2O8 in the presence of pyridine as a base is reported herein. In addition, a “one-pot” tandem
Joydev K. Laha, Pankaj Gupta, Amitava Hazra   +2 more
doaj   +1 more source