Results 91 to 100 of about 16,017 (235)

1,4-Dimethylpyridinium iodide

IUCrData, 2017
The title organic salt, C7H10N+·I−, was synthesized from a mixture of 4-methylpyridine and iodomethane in 2-propanol. It crystallized with three independent 1,4-dimethylpyridinium cations and three independent iodide anions in the asymmetric unit. In the
Joshua Deschner, Jack M. Choczynski, Calvin Y. Wong, Kathleen L. Hayes, Ralph R. Crisci, Emily M. Lasher, Joseph Dragonette, Allan Jay P. Cardenas   +7 more
doaj   +1 more source

A Modular Synthesis of Isoindole/Indolizine Hybrids via the 1,3‐Dipolar Cycloaddition of Pyridine‐Based Mesoionics with Benzyne

European Journal of Organic Chemistry, EarlyView.
An approach to prepare pyrido[2,1‐a]isoindoles via the cycloaddition of pyridine‐based 1,3‐dipoles and benzyne is described, offering modular access to a range of substituted products by systematic tuning of the dipole. A modular strategy for the synthesis of fused indolizine/isoindole hybrids, pyrido[2,1‐α]isoindoles, via cycloaddition of pyridine ...
Samira Taghizadeh Nodehi, Mohammad Ghanbari, Bruce A. Arndtsen   +2 more
wiley   +1 more source

Weak hydrogen and halogen bonding in 4-[(2,2-difluoroethoxy)methyl]pyridinium iodide and 4-[(3-chloro-2,2,3,3-tetrafluoropropoxy)methyl]pyridinium iodide

, 2017
To enable a comparison between a C—H...X hydrogen bond and a halogen bond, the structures of two fluorous-substituted pyridinium iodide salts have been determined.
Hsing-Fang Chiang, Yuh-Sheng Wen, Norman Lu, Joseph S. Thrasher, Ling-Kang Liu, Rong-Jyun Wei   +5 more
core   +1 more source

Crystal structure of 2-{[2-(3-phenylallylidene)hydrazin-1-yl]thiocarbonylsulfanylmethyl}pyridinium chloride

Acta Crystallographica Section E, 2014
In the title salt of an S-substituted dithiocarbazate, C16H16N3S2+·Cl−, the dihedral angles between the almost planar (r.m.s deviation = 0.005 Å) central CN2S2 residue and the terminal pyridinium and phenyl rings are 80.09 (11) and 3.82 (11 ...
May Lee Low, Thahira Begum S. A. Ravoof, Mohamed Ibrahim Mohamed Tahir, Karen A. Crouse, Edward R. T. Tiekink   +4 more
doaj   +1 more source

Antibacterial Hydrogel Dressing With Ca2+‐Dependent Hyaluronidase Responsiveness for Accelerating Wound Healing via On‐Demand Release of AIE Photosensitizers

Exploration, EarlyView.
This study innovates a Ca2+‐responsive hydrogel dressing that releases AIE photosensitizers on‐demand. Low Ca2+ enhances bacterial hyaluronidase (HAase) activity, degrading hyaluronic acid dressing to trigger antibacterial ROS release, while high Ca2+ inhibits HAase, preventing overdosing.
Rongwei Cui, Hao Yang, Miaomiao Kang, Zhijun Zhang, Weilin Xu, Yang Jiang, Lizhou Xu, Xiao‐Yong Zhan, Luhan Zhang, Yunsheng Xu, Dong Wang, Ben Zhong Tang, Danyang Li   +12 more
wiley   +1 more source

The synthesis of 2-amino-3-carboxamideindolizines with using pyridinium salt and C-nucleophiles–derivatives acetonitrile

Results in Chemistry
This study reports the synthesis of a pyridinium salt achieved by heating 2-chloropyridine with 2-bromoacetamide in the absence of solvent. The synthesized salt exhibits a high reactivity towards nucleophilic substitution reactions with C-nucleophiles ...
Oleksii Y. Kashner, Kyryl O. Bocharov, Gennadii E. Khoroshilov   +2 more
doaj   +1 more source

Crystal structure of the co-crystal salt 2-amino-6-bromopyridinium 2,3,5,6-tetrafluorobenzoate

Acta Crystallographica Section E: Crystallographic Communications, 2019
The asymmetric unit of the co-crystal salt 2-amino-6-bromopyridinium 2,3,5,6-tetrafluorobenzoate, C5H6BrN2+·C7HF4O2−, contains one pyridinium cation and one benzoate anion. In the crystal, the aminopyridinium cationic unit forms two hydrogen bonds to the
Eric Bosch
doaj   +1 more source

Catechol‐Containing Poly(2‐isopropyl‐2‐oxazoline): Synthesis and Thermoresponsive Behavior in Aqueous Salt Solutions

Macromolecular Rapid Communications, EarlyView.
Polymers carrying catechol groups are interesting mussel‐inspired materials for wet adhesion applications or metal ion complexation for wastewater treatment. Here, catechol‐containing poly(2‐isopropyl‐2‐oxazoline)s were synthesized via microwave‐assisted cationic (co)polymerization and examined with regard to their thermoresponsive LCST behavior in ...
Niclas Madaj, Nils Lüdecke, Sergio Kogikoski Jr., Ilko Bald, Helmut Schlaad   +4 more
wiley   +1 more source

Photocyclization Mechanism of Halopyridinium Salt Tethered to Arene:  Flash Photolysis Observation of a Pyridinium σ, Cyclohexadienyl Radicals, and a Dihalide Radical Anion in Aqueous Solution

, 2016
The photocyclization reactions of 2-halopyridinium salt tethered to arene have been studied. The photocyclization of 2-halophenethylpyridinium salts produced a six-membered heterocyclic product, pyrido[2,1-a]-3H,4H-isoquinolinium salt.
Yong-Tae Park (2489209), Chul-Gyun Hwang (3000690), Nam Woong Song (804658), Kwang-Wook Kim (2383648), Dongho Kim (29790)   +4 more
core   +1 more source

4-Aminopyridinium cis-2-carboxycyclohexane-1-carboxylate

Acta Crystallographica Section E, 2011
In the structure of the title molecular salt, C5H7N2+·C8H11O4−, the cis monoanions associate through short O—H...O hydrogen bonds in the carboxylic acid groups [graph set C(7)], forming zigzag chains which extend along the c ...
Urs D. Wermuth, Graham Smith
doaj   +1 more source