Results 71 to 80 of about 14,921 (209)

Retro‐Hetero‐Michael Addition Strategies in Organic Synthesis

European Journal of Organic Chemistry, EarlyView.
In this review, synthetic approaches to carbo‐ and heterocyclic compounds, including natural products, published in the last 15 years (2011–2025) which have either relied upon or included a retro‐hetero‐Michael addition step at any stage are discussed.
Dina Scarpi, Ernesto G. Occhiato
wiley   +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

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

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

Mechanochemistry Meets Catalysis: Metal Complexes for Greener Organic Transformations

Angewandte Chemie, Volume 138, Issue 29, 13 July 2026.
Mechanochemistry is redefining metal catalysis by controlling catalyst formulation, speciation, and deployment. This Review shows how milling, LAG, RAM, and TSE enable rapid metal‐complex assembly, distinctive catalytic manifolds, and scalable synthesis beyond solution chemistry.
Sourav Behera, Francesco Basoccu, Andrea Porcheddu   +2 more
wiley   +2 more sources

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

Sustainable Metal Recovery From E‐Waste: Exploring Greener Leachates in Hydrometallurgical Processes

MetalMat, EarlyView.
Recycling of electronic waste to synthesize valuable metals using green leachate. ABSTRACT The accumulation of electronic waste (e‐waste) poses environmental hazards and leads to the loss of valuable metals such as gold, silver, copper, and rare earth elements.
Shassatha Paul Saikat, Nazim Uddin, Md. Kawsar, Samina Ahmed, Md. Sahadat Hossain   +4 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

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