Results 71 to 80 of about 17,105 (265)

Enhanced Selectivity of Chalcogen Bonding over Halogen Bonding Catalyzed C‐glycosylation Through Differentiated Intermediate Activation

Angewandte Chemie, Volume 138, Issue 2, 9 January 2026.
By harnessing chalcogen bonding (ChB) catalysis, an exclusive access into a highly stereoselective strain‐release C‐glycosylation pathway was discovered. This was surprisingly not replicable by the conceptually similar halogen bonding (XB) catalysis.
Hao Guo, Charles C. J. Loh
wiley   +2 more sources

Research Progress of Polyoxometalate‐Integrated Frameworks: Syntheses, Properties, and Applications

ChemistryEurope, EarlyView.
This review systematically summarizes the integration of polyoxometalates with covalent organic frameworks, metal‐organic frameworks, hydrogen‐bonded organic frameworks, and emerging porous hosts. It highlights synergistic effects, synthesis strategies, and applications in catalysis, energy storage, sensing, and biomedicine, while addressing current ...
De‐Yin Wang, Zhang‐Di Liu, Rui Xing, Zi‐Hao Wei, Zaixiang Zhang, Yang Yang, Jin Zhu   +6 more
wiley   +1 more source

Skeletal Editing from Pyridine to Aniline via C‐Insertion and N‐Isomerization

ChemistryEurope, EarlyView.
A concise protocol is presented that converts pyridines into anilines by externalizing the original pyridine nitrogen at either the "ipso" or "ortho" position, which results in para or meta‐primary aniline products. A key carbene‐insertion step precedes nitrogen migration, preserving both ring size and overall structure.
Yun Luo, Jing Dai, Yongchang Wei, Chang Min   +3 more
wiley   +1 more source

π‐Expanded Nitrogen‐Cation (N+)‐Doped Polycyclic Aromatic Hydrocarbons: A Review of Intramolecular Cyclization Routes to Benzo[c]Quinolizinium, Triazinium, Pyridoquinazolinium, and Pyridoquinoxalinium Frameworks

European Journal of Organic Chemistry, EarlyView.
This review surveys recent progress in the synthesis of extended aromatic quinolizinium derivatives via intramolecular SNAr and oxidative 6π‐electrocyclization. Conventional thermal approaches are discussed alongside emerging, sustainable activation methods such as electrosynthesis and photochemical processes.
Marine Labro, Cyrille Monnereau, Laure Guy   +2 more
wiley   +1 more source

Bioactive Phytochemical Compounds in Medicago sativa L. (Alfalfa): A Systematic Review of Biological Properties and Therapeutic Relevance in Nutraceutical and Functional Food Implications

Food Frontiers, EarlyView.
ABSTRACT Medicago sativa L. (alfalfa) harbors a remarkably diverse reservoir of bioactive secondary metabolites. Flavonoids, isoflavones, and triterpenoid saponins dominate its bioactivity landscape, driving potent antioxidant, anti‐inflammatory, antimicrobial, estrogenic, hypolipidemic, and cytotoxic actions through redox modulation, membrane ...
Parham Joolaei Ahranjani, Hamid Rashidi Nodeh, Zahra Esfandiari, Giovanna Ferrentino   +3 more
wiley   +1 more source

Biodegradable Sodium Alginate Films Incorporated With Jateorhiza palmata (Lam.) Miers Extract for Active Food Packaging

Packaging Technology and Science, EarlyView.
Development of biodegradable sodium alginate films incorporated with J. palmata root extracts showing enhanced antioxidant and functional properties for active food packaging applications. ABSTRACT Biodegradable packaging helps reduce environmental impact by decomposing naturally and preventing plastic accumulation in ecosystems.
Carlos Augusto Badillo Almeira, Suiane Savazzi, Raul Remor Dalsasso, Alcilene Rodrigues Monteiro, Alessandro de Oliveira Rios   +4 more
wiley   +1 more source

Bacterial porphyrins in healthy skin: Microbiota components impact melanogenesis and age‐related processes leading to Porphyr'ageing

International Journal of Cosmetic Science, EarlyView.
Porphyrins, previously linked only to acne inflammation, are now implicated in skin ageing. Their presence correlates with increased melanin, inflammation, and oxidative stress, contributing to premature ageing signs. This study introduces the concept of “Porphyr'ageing,” highlighting the detrimental effects of bacterial metabolites on skin health and ...
Marie Meunier, Morgane De Tollenaere, Cyrille Jarrin, Emilie Chapuis, Marine Bracq, Laura Lapierre, Catherine Zanchetta, Jean Tiguemounine, Amandine Scandolera, Romain Reynaud   +9 more
wiley   +1 more source

Dopaminergic isoquinolines with hexahydrocyclopenta[ ij ]-isoquinolines as D 2 -like selective ligands

European Journal of Medicinal Chemistry, 2016
Dopamine receptors (DR) ligands are potential drug candidates for treating neurological disorders including schizophrenia or Parkinson's disease. Three series of isoquinolines: (E)-1-styryl-1,2,3,4-tetrahydroisoquinolines (series 1), 7-phenyl-1,2,3,7,8,8a-hexahydrocyclopenta[ij]-IQs (HCPIQs) (series 2) and (E)-1-(prop-1-en-1-yl)-1,2,3,4 ...
Párraga, Javier, Andujar, Sebastian Antonio, Rojas, Sebastian, Gutierrez, Lucas Joel, El Aouad, Noureddine, Sanz, M. Jesús, Enriz, Ricardo Daniel, Cabedo, Nuria, Cortes, Diego   +8 more
openaire   +5 more sources

Synthetic strategies for 5- and 6-membered ring azaheterocycles facilitated by iminyl radicals [PDF]

, 2016
The author thanks EaStCHEM for financial support.The totality of chemical space is so immense that only a small fraction can ever be explored. Computational searching has indicated that bioactivity is associated with a comparatively small number of ring ...
Walton, John Christopher
core   +2 more sources

Conversion of Amides into Esters by the Nickel-Catalyzed Activation of Amide C-N Bonds [PDF]

, 2015
The amide function is ubiquitous in natural compounds as well as in man-made molecules and materials. It is generally very stable and poorly reactive owing to its resonance-stabilized C–N group that imparts a planar geometry to amides.
A Greenberg, BM Rosen, DL Van Vranken, EH White, EJ Corey, Emma L. Baker, GE Keck, H Tatamidani, H Xu, JP Guthrie, JT Spletstoser, K Amaike, K Brix, K. N. Houk, KW Quasdorf, L Pauling, Liana Hie, M Blangetti, M Tobisu, NA Stephenson, Neil K. Garg, Noah F. Fine Nathel, Peng Liu, Q Lu, S Nahm, S-i Nishimoto, SB Blakey, SZ Tasker, T Hudlicky, T Mesganaw, T Mesganaw, T Shiba, T Yamamoto, TA Dineen, Tejas K. Shah, X Hong, X-Q Zhang, Xin Hong, Yun-Fang Yang   +38 more
core   +2 more sources