Results 141 to 150 of about 25,864 (264)

N-Heterocyclic Carbene Iron Silyl Hydride Complexes

, 2017
International audienceReaction of N-heterocyclic carbene iron(0) tetracarbonyl complexes with hydrosilanes (triphenylsilane, methyldiphenylsilane and diphenylsilane) under UV irradiation (350 nm) afforded the octahedral N-heterocyclic carbene iron(II ...
Roisnel, T., Darcel, Christophe, Luis C. Misal Castro, Thierry Roisnel, Mary Grellier, Quintero-Duque, S., Sortais, Jean-Baptiste, Samuel Quintero-Duque, Jean-Baptiste Sortais, Christophe Darcel, Vincent Dorcet, Dorcet, V., Li, H., Clot, E., Haoquan Li, Eric Clot, Misal Castro, L.C., Grellier, Mary   +17 more
core   +1 more source

Together We Are Stronger: An Unexpected Synergistic Effect During Anionic Ligand Exchange in Ruthenium Olefin Metathesis Catalysts

Advanced Synthesis &Catalysis, Volume 368, Issue 13, 2 July 2026.
Combining dichloro and diiodo ruthenium catalysts produces mixed chloro–iodo species via in situ halide exchange, resulting in a new, more efficient catalytic system. The mixed catalysts outperform their homo‐anionic counterparts, delivering enhanced activity, higher conversion, and strong suppression of isomerization under both thermal and ...
Nebal Alassad, Keren Iudanov, Albert Poater, N. Gabriel Lemcoff   +3 more
wiley   +1 more source

Synthesis of Quinolines and Tetrahydroquinolines From Aromatic Propargylamines via Activator‐Free Gold Catalysis in Hexafluoroisopropanol

Advanced Synthesis &Catalysis, Volume 368, Issue 13, 2 July 2026.
A straightforward, gold‐catalyzed cycloisomerization of aromatic propargylamines is reported, enabling efficient access to quinoline and tetrahydroquinoline derivatives. Hexafluoroisopropanol acts as both solvent and activator, eliminating the need for silver salts or additives.
Efstathios Tonis, Chrysoula Spyrou, Leandros P. Zorba, Nikolaos V. Tzouras, Chara Chatziathanasiou, Steven P. Nolan, Georgios C. Vougioukalakis   +6 more
wiley   +1 more source

The Solid‐State Emission of AIPE‐Active Tricarbonylrhenium(I) Complexes Shifts to the Red: The Unexpected Performance of Triphenylphosphine Derivatives

Aggregate, Volume 7, Issue 7, July 2026.
New phosphino tricarbonylrhenium(I) complexes have efficient red emission in the aggregate and solid states. The good photostability and the vast possibilities of chemical modifications make these Re‐based complexes the starting point of a new generation of red emitters with aggregation‐induced phosphorescence emission (AIPE) characteristics.
Valentine Guilbaud, Mariusz Wolff, Maëlle Deleuzière, Evelyne Delfourne, Corinne Vanucci‐Bacqué, Charles‐Louis Serpentini, Sonia Mallet‐Ladeira, Eric Benoist, Suzanne Fery‐Forgues   +8 more
wiley   +1 more source

Chiral N‑Heterocyclic-Carbene-Catalyzed Cascade Asymmetric Desymmetrization of Cyclopentenediones with Enals: Access to Optically Active 1,3-Indandione Derivatives

, 2019
A chiral N-heterocyclic-carbene-catalyzed cascade asymmetric desymmetrization reaction of cyclopentenediones with enals has been successfully initiated, followed with tandem aldol annulation, aromatization, as well as sequential methylation.
Xiao-Peng Yang (7507091), Zheng Wang (25883), Xing-Wang Wang (1538014), Jia-Ming Hu (7417463), Bing-Bing Sun (3924362), Jun-Bo Chen (149490), Hao-Peng Lv (7507094), Jun-Qi Zhang (1538008), Jie-Qiang Yu (7507088)   +8 more
core   +1 more source

Unlocking Catalyst Activation as a Critical Bottleneck in Cross‐Coupling Reactions: Room‐Temperature Couplings of Weak Nucleophiles Enabled by [Pd(1‐MeNAP)TFA]2 Precatalysts

Angewandte Chemie International Edition, Volume 65, Issue 27, 1 July 2026.
In many Pd‐catalyzed cross‐couplings, catalyst performance has been found to be limited by catalyst activation. Methylnaphthyl (MeNAP) palladium trifluoroacetate dimers are presented as easy‐to‐store and easy‐to‐handle precursors, which rapidly activate under reaction conditions, even when only weakly coordinating, non‐reducing nucleophiles are present.
Sourav Manna, Henric F. Janning, Nikolaos V. Tzouras, Jane Anto Simplica Sagayaraj, Fadil Faizal Mannighayil, Angelino Doppiu, Lukas J. Gooßen   +6 more
wiley   +1 more source

Recent Advances in Benzannulation Approaches to Aromatic Frameworks

Chemistry – An Asian Journal, Volume 21, Issue 13, 14 July 2026.
This review summarizes benzannulation strategies reported over the past 5 years, highlighting recent advances that enable efficient access to structurally diverse and highly substituted arenes through both transition‐metal‐catalyzed and metal‐free approaches.
Heeeun Kim, Yonghoon Kwon
wiley   +1 more source

NH Bond Activation of Hydrazine Using Cyclic (alkyl)(amino)carbenes and Boranes

ChemistryEurope, Volume 4, Issue 7, July 2026.
EtcAAC activates the NH bond of phenyl‐substituted hydrazines, forming EtcAAC(H)(N2HnPh3‐n) (n = 1–2). In contrast, the reaction between EtcAAC and unsubstituted hydrazine (N2H4) undergoes further decomposition. Productive NH activation of N2H4 is achieved by incorporating boranes both inter‐ and intramolecularly, leveraging their distinct binding ...
Hayoung Song, Nathaniel K. Szymczak
wiley   +1 more source

When Dark States Become Bright: Vibronic Intensity Borrowing in Triplet 2,6‐Dichloro‐4‐Hydroxyphenylnitrene

Journal of Physical Organic Chemistry, Volume 39, Issue 7, July 2026.
Irradiation of 4‐azido‐2,6‐dichlorophenol in cryogenic matrices generates triplet 2,6‐dichloro‐4‐hydroxyphenylnitrene. Vibronically structured absorption enables extension of a formally forbidden transition into the visible region (up to 500 nm). Analyses based on NICS(1.7)zz, ACID, HOMA, MCI, and spin density reveal magnetically induced ring currents ...
Dharma Raj Joshi, Anindya Borah, Dmitrii Govorov, Trevor Henry, Bruce S. Ault, Anna D. Gudmundsdottir   +5 more
wiley   +1 more source

Gold(I)‐Mediated Reactivity of Allenes With Mesoionic Nucleophiles: A Computational Exploration

European Journal of Organic Chemistry, Volume 29, Issue 24, 23 June 2026.
The regioselective gold(I)‐mediated reactivity of allenes with mesoionic nucleophiles has been evaluated through computational analysis of the mechanisms involved. Instead of typical (3 + 2) pathways, sydnones and münchnones favour the formal (3 + 3) cyclizations affording substituted dihydropyridines.
Eduardo Garcia‐Padilla, Feliu Maseras
wiley   +1 more source