Results 71 to 80 of about 38,114 (261)

Monosubstituted N‐Arylhydroxylamine Chemistry: Integrating Contemporary Synthetic Approaches for the Efficient Construction of Diverse Heterocyclic Scaffolds

Chemistry – A European Journal, EarlyView.
Monosubstituted N‐arylhydroxylamines represent a unique subclass of hydroxylamines that act as pivotal intermediates in redox transformations and as versatile platforms for further synthetic transformations. They serve as key building blocks in the synthesis of architecturally complex heterocycles and other valuable organic compounds.
Michael G. Kallitsakis, Kyriakos D. Nikopoulos, Ioannis N. Lykakis   +2 more
wiley   +1 more source

Scenarios of Deoxygenation of the Eastern Tropical North Pacific During the Past Millennium as a Window Into the Future of Oxygen Minimum Zones

Frontiers in Earth Science, 2019
Diverse studies predict global expansion of Oxygen Minimum Zones (OMZs) as a consequence of anthropogenic global warming. While the observed dissolved oxygen concentrations in many coastal regions are slowly decreasing, sediment core paleorecords often ...
Konstantin Choumiline, Ligia Pérez-Cruz, Andrew B. Gray, Steven M. Bates, Timothy W. Lyons   +4 more
doaj   +1 more source

Effects of Knee Joint Angle on Intramuscular Blood Flow and Muscle Deoxygenation During Fatiguing Isometric Contractions. [PDF]

Scand J Med Sci Sports
ABSTRACT The purpose of this study was to investigate the effect of the knee joint angle on intramuscular blood flow and muscle deoxygenation during fatiguing intermittent isometric knee extensions. Seventeen healthy young male participants (19.6 ± 1.3 years) performed intermittent (5 s contraction, 5 s relaxation) and incremental isometric knee ...
Izumi K, Katayama K, Kano Y, Tanaka N, Akima H.   +4 more
europepmc   +2 more sources

Room-Temperature Alternative to the Arbuzov Reaction: The Reductive Deoxygenation of Acyl Phosphonates [PDF]

, 2010
The reductive deoxygenation of acyl phosphonates using a Wolff−Kishner-like sequence is described. This transformation allows direct access to alkyl phosphonates from acyl phosphonates at room temperature. The method can be combined with acyl phosphonate
Dougherty, Dennis A., Kedrowski, Sean M. A.   +1 more
core   +2 more sources

An Electron‐Poor Nickel Diphosphine Complex: Synthesis, Structure, and Reactivity of Ni(dFppe)2

Chemistry – A European Journal, EarlyView.
Fluorinated diphosphine ligands such as 1,2‐bis[bis(pentafluorophenyl)phosphino]ethane (dFppe) offer powerful electronic tunability and unusual reactivity. Despite known analogues of the heavier congeners Pd and Pt, Ni complexes of dFppe remain conspicuously absent.
A. Dina Dilinaer, Marcus W. Drover
wiley   +1 more source

Hydrodeoxygenation of stearic acid for the production of “green” diesel

Green Processing and Synthesis, 2014
The current work is devoted to the second-generation biodiesel production via fatty acids catalytic hydrodeoxygenation (HDO). Pd-containing catalysts based on polymeric matrix of hypercrosslinked polystyrene (HPS) with different metal loading were ...
Stepacheva Antonina A., Nikoshvili Linda Zh., Sulman Esther M., Matveeva Valentina G.   +3 more
doaj   +1 more source

Hydroprocessing of synthetic kerosene over a non‐sulphided Ni/Al2O3 catalyst: Impact of alcohols and ketones on alkene conversion

The Canadian Journal of Chemical Engineering, EarlyView.
Abstract Synthetic jet fuel containing non‐petroleum‐derived kerosene can be produced from synthetic kerosene obtained through processes that include a hydroprocessing step. The potential use of non‐sulphided (reduced) nickel supported on alumina (Ni/Al2O3) was evaluated as an alternative to sulphided catalysts to saturate alkenes in sulphur‐free ...
Garima Chauhan, Felix Link, Cibele Melo Halmenschlager, Arno de Klerk   +3 more
wiley   +1 more source

Polysilane‐Supported Nickel as an Efficient Catalyst for the Hydrogenation of Aromatic Compounds†

Chinese Journal of Chemistry, EarlyView.
A Ni/Si catalyst obtained from the reaction of poly(monohydro)silane with Ni(cod)2 serves as an effective heterogeneous catalyst for the hydrogenation of arenes under reaction conditions that are significantly milder than those required for conventional nickel‐based catalysts such as Raney nickel.
Hiromu Baba, Yusuke Sunada
wiley   +1 more source

Mechanisms and Advanced Characterizations for Urea Electrosynthesis

EcoEnergy, EarlyView.
In this review, various mechanisms and the advanced characterizations involved in urea electrosynthesis are summarized. Furthermore, the outlook on the future potential, the challenges, and scope of these techniques for developing the urea electrosynthesis route are discussed, paving the way for the green synthesis of urea and other important chemicals.
Chu Zhang, Liwei Guo, Shuangli Li, Zihan Chen, Chunshuang Yan, Chade Lv   +5 more
wiley   +1 more source

A Practical and Flexible De Novo Synthesis of Deoxygenated Carbasugars and Their Cyclitol Epoxides

European Journal of Organic Chemistry, EarlyView.
A de novo synthesis route comprising enantioselective Brown crotylation and ring‐closing metathesis as the key steps enables the synthesis of a‐ and b‐carba‐paratose, a‐ and b‐carba‐colitose as well as four configurational deoxycyclophellitol isosteres.
Yevhenii Radchenko, Nick D. F. Puijmbroeck, Sanne M. Verduin, Jeroen D. C. Codée, Herman S. Overkleeft   +4 more
wiley   +1 more source