Results 31 to 40 of about 207,671 (274)

Aryl substitution of pentacenes

Beilstein Journal of Organic Chemistry, 2014
A series of 11 new pentacene derivatives has been synthesized, with unsymmetrical substitution based on a trialkylsilylethynyl group at the 6-position and various aryl groups appended to the 13-position.
Andreas R. Waterloo, Anna-Chiara Sale, Dan Lehnherr, Frank Hampel, Rik R. Tykwinski   +4 more
doaj   +1 more source

Hydrogenative Cyclopropanation and Hydrogenative Metathesis

, 2019
The unusual geminal hydrogenation of a propargyl alcohol derivative with [CpXRuCl] as the catalyst entails formation of pianostool ruthenium carbenes in the first place; these reactive intermediates can be intercepted with tethered alkenes to give either
Biberger, T., Fürstner, A., Guthertz, A., Peil, S.   +3 more
core   +1 more source

3R-Substituted and Norbornane-Annelated 1H-Phospholanoxides: Synthesis and Structure

Chemistry Proceedings, 2021
A method for the synthesis of 3R-substituted and norbornane-annelated 1H-phospholan oxides has been developed. The method is based on the in situ substitution of the Al atom by the P atom in five-membered cyclic alumolanes using phosphorus trichloride ...
Alevtina L. Makhamatkhanova, Rimma R. Nurislamova, Vladimir A. D’yakonov, Usein M. Dzhemilev   +3 more
doaj   +1 more source

Further characterization of glycine-containing microcystins from the McMurdo Dry Valleys of Antarctica [PDF]

, 2015
Microcystins are hepatotoxic cyclic peptides produced by several cyanobacterial genera worldwide. In 2008, our research group identified eight new glycine-containing microcystin congeners in two hydro-terrestrial mat samples from the McMurdo Dry Valleys ...
Cary, S. Craig, Hamilton, David P., Holland, Patrick T., Prinsep, Michèle R., Puddick, Jonathan, Wood, Susanna A.   +5 more
core   +3 more sources

Preparation and Electrochemical Properties of LiCuxMn2-xO4 (x ≤ 0.10) Cathode Material by a Low-Temperature Molten-Salt Combustion Method

International Journal of Electrochemical Science, 2015
Single-phase LiCuxMn2-xO4 cathode materials were prepared by a molten-salt combustion method. Surface morphology and particle size of the synthesized materials were characterized by scanning electron microscopy.
Jijun Huang, Qiling Li, Hongli Bai, Wangqiong Xu, Yonghui He, Changwei Su, Jinhui Peng, Junming Guo   +7 more
doaj   +1 more source

The Use of Aryl-Substituted Homophthalic Anhydrides in the Castagnoli–Cushman Reaction Provides Access to Novel Tetrahydroisoquinolone Carboxylic Acid Bearing an All-Carbon Quaternary Stereogenic Center

Molecules, 2022
Novel aryl-substituted homophthalic acids were cyclodehydrated to the respective homophthalic anhydrides for use in the Castagnoli–Cushman reaction.
Nazar Moshnenko, Alexander Kazantsev, Olga Bakulina, Dmitry Dar’in, Mikhail Krasavin   +4 more
doaj   +1 more source

Unraveling the Coulombic Forces in Electronically Decoupled Bichromophoric Systems during Two Successive Electron Transfers [PDF]

, 2017
Coulombic forces are vital in modulating the electron transfer dynamics in both synthetic and biological polychromophoric assemblies, yet quantitative studies of the impact of such forces are rare, as it is difficult to disentangle electrostatic forces ...
Ivanov, Maxim V., Rathore, Rajendra, Wadumethrige, Shriya, Wang, Denan   +3 more
core   +2 more sources

A Direct Elliptic Solver Based on Hierarchically Low-rank Schur Complements

, 2016
A parallel fast direct solver for rank-compressible block tridiagonal linear systems is presented. Algorithmic synergies between Cyclic Reduction and Hierarchical matrix arithmetic operations result in a solver with $O(N \log^2 N)$ arithmetic complexity ...
A. Aminfar, B.L. Buzbee, I. Ibragimov, J. Xia, J. Xia, J. Xia, L. Grasedyck, P. Amestoy, P. Swarztrauber, P.G. Schmitz, P.G. Schmitz, R.W. Hockney, S. Ambikasaran, S. Chandrasekaran   +13 more
core   +1 more source

An iodabenzene story [PDF]

, 2017
We call iodabenzene a cyclic (CH)5I molecule. A planar iodabenzene would have 8 π electrons, a situation best avoided by an out-of-plane distortion to a bird-like geometry.
Chakkingal Parambil, Priyakumari, Hoffmann, Roald, Rawashdeh, Abdel Monem, Zeng, Tao   +3 more
core   +1 more source

Reciprocal control of viral infection and phosphoinositide dynamics

FEBS Letters, EarlyView.
Phosphoinositides, although scarce, regulate key cellular processes, including membrane dynamics and signaling. Viruses exploit these lipids to support their entry, replication, assembly, and egress. The central role of phosphoinositides in infection highlights phosphoinositide metabolism as a promising antiviral target.
Marie Déborah Bancilhon, Bruno Mesmin
wiley   +1 more source