Results 51 to 60 of about 14,921 (209)

Bioinspired Design and Synthesis of Polyphenolic Star‐Like and Hyperbranched Polyester Models

Chemistry – A European Journal, EarlyView.
Gallotannin‐inspired star‐like and hyperbranched aromatic polyesters were synthesized from D‐glucose and ABn‐type phenolic acid monomers, such as protocatechuic acid. This bioinspired approach afforded polyphenolic polymeric nanoparticles able to encapsulate hydrophobic dyes, opening new perspectives for biobased encapsulation and delivery systems ...
Guanfei Shen, Laurent Pouységu, Christophe Schatz, Etienne Grau, Stéphane Quideau   +4 more
wiley   +1 more source

4-(Dimethylamino)pyridinium tetrachlorido(quinoline-2-carboxylato-κ2N,O)stannate(IV)

Acta Crystallographica Section E, 2011
In the title salt, (C7H11N2)[SnCl4(C10H6NO2)], the SnIV atom is chelated by the N,O-bidentate carboxylate ions and four chloride ions, showing a distorted octahedral SnNOCl4 coordination.
Ezzatollah Najafi, Mostafa M. Amini, Seik Weng Ng   +2 more
doaj   +1 more source

Photosensitizing Au(I) Catalysis With Coumarins

Chemistry – A European Journal, EarlyView.
A Au(I) complex with a tethered coumarin fragment was synthesized and characterized by UV‐vis and emission spectroscopy. Its ability to facilitate photo‐driven cross‐coupling reactions through single‐electron and energy transfer events was evaluated. ABSTRACT Gold catalysis shows versatility in a wide range of challenging transformations, wherein light‐
Liliana Capulín Flores, Jacob J. van der Wal, Johannes E. M. N. Klein   +2 more
wiley   +1 more source

Corrosion Inhibition Properties of Corrosion Inhibitors to under-Deposit Corrosion of X65 Steel in CO₂ Corrosion Conditions

Molecules
Under-deposit corrosion is widely present in the pipelines of oil and gas production, causing significant corrosion damage. In this paper, a novel electrochemical cathodic-polarization method was carried out to accelerate the formation of CaCO3 scale on ...
Hai Lin, Xiaorong Chen, Zhongming Luo, Jun Xu, Ping Lu, Tianyi Xie, Jiayi Tang, Hu Wang   +7 more
doaj   +1 more source

Crystal structure of 1-[(1-methyl-5-nitro-1H-imidazol-2-yl)methyl]pyridinium iodide

Acta Crystallographica Section E: Crystallographic Communications, 2015
In the title salt, C10H11N4O2+·I−, the asymmetric unit consists of a pyridinium cation bearning a (1-methyl-5-nitro-1H-imidazol-2-yl)methyl group at the N position and an iodide anion.
Roumaissa Belguedj, Abdelmalek Bouraiou, Hocine Merazig, Ali Belfaitah, Sofiane Bouacida   +4 more
doaj   +1 more source

Single‐Step Synthesis of Dithieno[3,2‐b:2′,3′‐e]Pyridines and Their Acid‐Dependent Optical and Photosensitising Properties

Chemistry – A European Journal, EarlyView.
The synthesis of dithieno[3,2‐b:2′,3′‐e]pyridines (DTPs) is herein reported, and their optical properties are studied both experimentally and computationally. Protonation or methylation of the nitrogen atom induced bathochromic shifts in their absorption and emission spectra.
Dominic Taylor, Matthew Wallace, Leonardo Amicosante, Gary S. Nichol, Scott J. Dalgarno, Filipe Vilela, Iain A. Wright, Neil B. McKeown   +7 more
wiley   +1 more source

Reaction of Pyridinium Salts with Active Methylene Compounds

YAKUGAKU ZASSHI, 2006
The carbon-carbon bond-forming reactions of 1-methyl-2-methylthiophenylpyridinium iodides with active methylene compounds (such as dimethyl malonate, malononitrile) using NaH as a base gave the 2-substituted methylene-1,2-dihydropyridine derivatives.
Reiko, Fujita, Masato, Hoshino, Yasuhiro, Nishiuchi, Hiroshi, Tomisawa   +3 more
openaire   +3 more sources

FLP Mediated Conversion of Difluorobenzylalkynes to Fluoroallenyl Oniums via an SN1’ Pathway

Chemistry – A European Journal, EarlyView.
Frustrated Lewis pair (FLP) selective C‒F activation of difluorobenzylalkynes allows the formation of fluoroallenic oniums via an SN1’ substitution pathway. The fluoroallenic onium salts are synthetic precursors that allow subsequent functionalization at allenic and onium positions.
Max Coles, Tianhong Wang, Rubi McLennan, Long Kit Kwan, Bivas Mondal, Chakyu Richard Chan, Rowan D. Young   +6 more
wiley   +1 more source

Crystal structure of 4-carbamoylpyridinium chloride

Acta Crystallographica Section E: Crystallographic Communications, 2016
The hydrochloride salt of isonicotinamide, C6H7N2O+·Cl−, has been synthesized from a dilute solution of hydrochloric acid in acetonitrile. The compound displays monoclinic symmetry (space group C2/c) at 150 K, similar to the related hydrochloride salt of
Simon M. Fellows, Timothy J. Prior
doaj   +1 more source

Stereoretentive Nucleophilic Aromatic Substitution Accesses Atropisomeric 4‐Amino‐N‐Arylquinolinium Salts

Chemistry – A European Journal, EarlyView.
Quinolin‐4‐ones were converted to chloroquinolinium salts, allowing formation of axially chiral aminoquinolinium salts via an enantioretentive SNAr reaction with a variety of amine nucleophiles. The salts have a high rotational barrier, with a racemization half‐life of ∼1000s of years.
Darren Holmes, Nia Foster, Saima Ansari, Paul Kavanagh, Paul Dingwall, Peter C. Knipe   +5 more
wiley   +1 more source