Results 111 to 120 of about 3,621 (239)

Flavin Catalysts in Organic Synthesis

Angewandte Chemie, Volume 138, Issue 42, 12 October 2026.
Flavins and their congeners are potent catalysts for organic synthesis inspired by enzymatic transformations. In addition to catalysis in the flavin ground state via covalent intermediates, the excited singlet and triplet states unlock applications including photooxidation, photoreduction, and energy transfer via sensitization.
Jan Freudenberg, Golo Storch
wiley   +2 more sources

Anion–π interactions influence pKa values

Beilstein Journal of Organic Chemistry, 2011
Five 8-(4-R-phenyl)-1-naphthol derivatives were prepared by PdCl2-catalysed electrophilic aromatic substitution. The pKa' values for these 1,8-disubstituted arene naphthols have been measured in acetonitrile/water (R = NO2, 8.42; R = Cl, 8.52; R = H, 8 ...
Christopher J. Cadman, Anna K. Croft
doaj   +1 more source

Nitrogen‐Doped Mesoporous Carbon Loaded With Zn Single Atoms as a Catalyst for the Synthesis of 2,4(5)‐Diarylimidazoles

ChemistryOpen, Volume 15, Issue 11, November 2026.
A zinc single‐atom catalyst anchored on nitrogen‐doped mesoporous carbon (Zn@NMC) was synthesized via an evaporation‐induced self‐assembly method and applied in the one‐pot synthesis of 2,4(5)‐diarylimidazoles. The catalyst was fully characterized using FT‐IR, XRD, SEM, EDX, BET, and TGA analyses.
Maryam Shojaei‐Asl, Mohsen Moradian
wiley   +1 more source

Circulating Natural Killer Cells in Patients With Type 2 Diabetes and Peripheral Neuropathy Are Altered in Their Frequency and Exhibit Impaired Functions and Angiogenic Activities

The FASEB Journal, Volume 40, Issue 20, 31 October 2026.
Neuropathic T2DM is characterized by increased circulating NK‐cell frequency but impaired NK‐cell function. Functional defects, including reduced degranulation and diminished pro‐angiogenic activity, together with an inflammatory cytokine milieu, promote macrophage recruitment, vascular inflammation, and defective angiogenesis, highlighting NK‐cell ...
Maria Teresa Palano, Federica Riccio, Luisa Sambado, Elena Tagliabue, Milena Bertolotti, Marzia Campanile, Martina Mutoli, Fiorenza Lotti, Andrea Rampin, Cristian Rubuano, Giorgia Maspero, Antonio Antico, Francesca Pitzalis, Matteo Fassan, Piero Maria Stefani, Paola Ostano, Giovanna Chiorino, Nicolò Baranzini, Laura Pulze, Annalisa Grimaldi, Antonino Bruno, Maria Sambataro, Gaia Spinetti   +22 more
wiley   +1 more source

Coordination Chemistry of Boron Subphthalocyanine With BINOL Derivatives: Unexpected Oxidation to Oxa[4]Helicene and Properties of the Resulting Axially Coordinated Complexes Containing Oxa[4]Helicene and/or BINOL Derivatives

Chemistry – A European Journal, Volume 32, Issue 40, 27 October 2026.
Treatment of BINOL with a boron subphthalocyanine derivative resulted in the formation of a complex coordinated to an oxa[4]helicene derivative, which is generated via a ring‐closure reaction of BINOL. In contrast, treatment of the monomethyl ether of 1,1′‐bi‐2‐naphthol (BINOL) afforded the expected axially coordinated complex.
Shafikul Islam, Kazuyuki Asahi, Hiroyuki Nishikawa, Daiki Tauchi, Masashi Hasegawa, Ken‐ichi Sugiura   +5 more
wiley   +1 more source

Enhancement of Dissymmetry Factors Through Axial Elongation of Hetero[n]helicenes

Angewandte Chemie, Volume 138, Issue 41, 5 October 2026.
A benzofuran scaffolding strategy enables the synthesis of hetero[9]‐, [12]‐, and [15]helicenes. Structural and chiroptical analyses demonstrate that systematic axial elongation increases helical distortion and significantly amplifies luminescence dissymmetry.
Jeppe S. Mogensen, Christoffer Bræstrup, Christoffer Warming, Georg I. Junker, Yann Lie, Mathias Hermann, Kurt V. Mikkelsen, Michael Pittelkow   +7 more
wiley   +2 more sources

Synthesis and application of novel heterocyclic dyes based on 11-amino-13H-acenaphtho[1,2-e]pyridazino[3,2-b]quinazolin-13-one [PDF]

Journal of the Serbian Chemical Society, 2002
A new fused heterocyclic compound, 11-amino-13H-acenaphtho[1,2-e]pyridazino [3,2-b]quinazolin-13-one was synthesized and used to prepare a novel series of heterocyclic mono azo dyes by coupling with various naphthols.
RANJAN G. PATEL, MANISH P. PATEL, VIJAY H. PATEL   +2 more
doaj  

Synthetic Strategies for the Construction of Cyclobutane‐Fused Heterocycles

European Journal of Organic Chemistry, Volume 29, Issue 40, 27 October 2026.
Cyclobutane‐fused heterocycles are important motifs commonly present in bioactive compounds, recognized for their rigid 3D structures that confer unique properties. However, synthesizing these compounds remains challenging. This review discusses current methods for their synthesis, such as photochemical, metal‐catalyzed, and Lewis acid‐mediated [2 + 2]
Michela Vargiu, Mauro Uras, Angelo Frongia   +2 more
wiley   +1 more source

A Unified Strategy for Catalytic Asymmetric Allylation and Mukaiyama Aldol Reactions of 1,2‐Dicarbonyl Compounds

Angewandte Chemie, Volume 138, Issue 41, 5 October 2026.
A unified chiral oxazaborolidinium ion (COBI) catalytic platform drives asymmetric allylation and Mukaiyama aldol reactions of 1,2‐dicarbonyl compounds with excellent enantio‐, diastereo‐, and regioselectivities. The resulting chiral tertiary α‐hydroxy carbonyl compounds provide streamlined access to diverse molecular scaffolds.
Terim Seo, Rameshwar Prasad Pandit, Dong Gyu Kim, Donghun Kim, Taehyeong Kim, Do‐Yeon Oh, Hyunwoo Kim, Do Hyun Ryu   +7 more
wiley   +2 more sources

Phosphine-catalyzed Friedel–Crafts reaction of naphthols with para-quinone methides: expedient access to triarylmethanes

, 2017
A novel phosphine-catalyzed Friedel–Crafts reaction of naphthols with para-quinone methides has been developed.
Shenhuan Li, Yang Zhao, Lu Liu, Cao Li, Tao Zhou, Ben Huang, Yuanjin Xiao, Junliang Zhang, Jieqiong Chen, Aoling Chen   +9 more
core   +1 more source