Results 41 to 50 of about 24,787 (265)

The role of C/O in nitrile astrochemistry in PDRs and planet-forming disks [PDF]

, 2019
Complex nitriles, such as HC3N, and CH3CN, are observed in a wide variety of astrophysical environments, including at relatively high abundances in photon-dominated regions (PDR) and the UV exposed atmospheres of planet-forming disks. The latter have been inferred to be oxygen-poor, suggesting that these observations may be explained by organic ...
arxiv   +1 more source

Isoxazole derivatives as new nitric oxide elicitors in plants

Beilstein Journal of Organic Chemistry, 2017
Several 3,5-disubstituted isoxazoles were obtained in good yields by regiospecific 1,3-dipolar cycloaddition reactions between aromatic nitrile oxides, generated in situ from the corresponding hydroxyimidoyl chlorides, with non-symmetrical activated ...
Anca Oancea, Emilian Georgescu, Florentina Georgescu, Alina Nicolescu, Elena Iulia Oprita, Catalina Tudora, Lucian Vladulescu, Marius-Constantin Vladulescu, Florin Oancea, Calin Deleanu   +9 more
doaj   +1 more source

A Convenient Synthesis of Novel Isoxazolidine and Isoxazole Isoquinolinones Fused Hybrids

Molecules, 2023
Isoxazolidine, isoxazole, and isoquinolinone rings are present in the structure of several natural products and/or pharmaceutically interesting compounds.
Konstantinos A. Ouzounthanasis, Stergios R. Rizos, Alexandros E. Koumbis   +2 more
doaj   +1 more source

Thermomechanical properties of zirconium tungstate/hydrogenated nitrile butadiene rubber (HNBR) composites for low-temperature applications [PDF]

J Mater Sci (2016) 51: 10714, 2017
Rubber compounds for pressure sealing application typically have inferior dimensional stability with temperature fluctuations compared with their steel counterparts. This effect may result in seal leakage failures when subjected to decreases in temperature. Composites of hydrogenated nitrile butadiene rubber (HNBR) and zirconium tungstate as a negative
arxiv   +1 more source

Umpolung Synthesis of Pyridyl Ethers by BiV‐Mediated O‐Arylation of Pyridones

Angewandte Chemie, Volume 134, Issue 51, December 19, 2022., 2022
We demonstrate that sterically‐ and electronically‐diverse pyridyl ethers can be accessed via BiV‐mediated C−O coupling of 2‐ or 4‐pyridones with arylboronic acids. Use of a bismacyclic reagent not only confers modularity on our methodology, but also results in highly regioselective O‐arylation that is unprecedented for BiV.
Katie Ruffell, Liliana C. Gallegos, Kenneth B. Ling, Robert S. Paton, Liam T. Ball   +4 more
wiley   +2 more sources

Plastic-crystalline solid-state electrolytes: Ionic conductivity and orientational dynamics in nitrile mixtures [PDF]

J. Chem. Phys. 150 (2019) 244507, 2019
Many plastic crystals, molecular solids with long-range, center-of-mass crystalline order but dynamic disorder of the molecular orientations, are known to exhibit exceptionally high ionic conductivity. This makes them promising candidates for applications as solid-state electrolytes, e.g., in batteries.
arxiv   +1 more source

One-step synthesis of differently bis-functionalized isoxazoles by cycloaddition of carbamoylnitrile oxide with β-keto esters [PDF]

, 2012
A new protocol for synthesizing different functionalized isoxazoles is provided. Carbamoylnitrile oxide generated from nitroisoxazolone underwent inverse electron-demand 1,3-dipolar cycloaddition with 1,3-dicarbonyl compounds in the presence of magnesium
975, 976, 977, 978, 979, 980, 981, 982, Ariga, Masahiro, Hirao, Shotaro, Ise, Yumiko, Kobiro, Kazuya, Nishiwaki, Nagatoshi, Nishizawa, Maho, Saigo, Kazuhiko, Sawayama, Jun   +15 more
core   +1 more source

TOMM20 as a driver of cancer aggressiveness via oxidative phosphorylation, maintenance of a reduced state, and resistance to apoptosis

Molecular Oncology, EarlyView.
TOMM20 increases cancer aggressiveness by maintaining a reduced state with increased NADH and NADPH levels, oxidative phosphorylation (OXPHOS), and apoptosis resistance while reducing reactive oxygen species (ROS) levels. Conversely, CRISPR‐Cas9 knockdown of TOMM20 alters these cancer‐aggressive traits.
Ranakul Islam, Megan E. Roche, Zhao Lin, Diana Whitaker‐Menezes, Victor Diaz‐Barros, Eurico Serrano, Maria Paula Martinez Cantarin, Nancy J. Philp, Atrayee Basu Mallick, Ubaldo Martinez‐Outschoorn   +9 more
wiley   +1 more source

1,3-Dipolar Cycloaddition Reaction of Nitrile Oxides to Isatin Imines [PDF]

Iranian Journal of Chemistry & Chemical Engineering, 2016
A simple and efficient one-pot route for the synthesis of novel spiro [indolin– oxadiazol] derivativesby 1,3-dipolar cycloaddition reaction of nitrile oxides and isatin imine under classical or microwave irradiation conditions is described.4-amino-5 ...
Saeid Souzangarzadeh
doaj  

Synthesis and 1,3-Dipolar Cycloaddition Reactions of Chiral Maleimides

Molecules, 1997
New routes to the synthesis of various novel chiral maleimides are described. The oxabicyclic anhydride 2 readily available exo-Diels-Alder adduct of furan and maleic anhydride was used as a vehicle, which in turn reacted with hydrochlorides of amino ...
Lubor Fisera, Vladimir Ondrus
doaj   +1 more source