Results 121 to 130 of about 8,786 (262)

Learning Strategies from Nature's Blueprint to Cyclic Carbonate Synthesis

ChemSusChem, Volume 18, Issue 6, March 15, 2025.
The development of sustainable synthetic methods for cyclic carbonates draws inspiration from nature, focusing on eco‐friendly processes and renewable resources like CO2 and biomass. This review explore various CO2 activation mechanisms, green chemistry principles, and green catalysts.
Erika Saccullo, Vincenzo Patamia, Chiara Zagni, Antonio Rescifina, Giuseppe Floresta   +4 more
wiley   +1 more source

Catalytic construction of non-carbon stereocenters by N-heterocyclic carbenes

Discover Chemistry
Chirality is widely present in natural products, pharmaceutical compounds, and functional molecules. N-heterocyclic carbene (NHC) catalysis has emerged as a pivotal strategy for constructing stereocenters, leveraging its strong σ-donating capability and ...
Xiaoqing Lai, Yao Chen, Hongzhi Zhuang, Huan Gong, Yongchang Hu, Xingkuan Chen   +5 more
doaj   +1 more source

A Hoveyda–Grubbs‐Type Olefin Metathesis Catalyst Bearing a Fluorinated Unsymmetrical NHC Ligand

European Journal of Inorganic Chemistry, EarlyView.
A fluorinated unsymmetrical NHC ruthenium complex was synthesised and employed as a catalyst for olefin metathesis reactions. The modification of the steric and electronic properties of the NHC ligand through the introduction of fluorine substituents results in improved activity but lower selectivity compared to the analogous non‐fluorinated NHC ...
Rubina Troiano, Concetta Liguori, Chiara Costabile, Fabia Grisi   +3 more
wiley   +1 more source

Dimerisation, rhodium complex formation and rearrangements of N-heterocyclic carbenes of indazoles

Beilstein Journal of Organic Chemistry, 2014
Deprotonation of indazolium salts at low temperatures gives N-heterocyclic carbenes of indazoles (indazol-3-ylidenes) which can be trapped as rhodium complexes (X-ray analysis).
Zong Guan, Jan C. Namyslo, Martin H. H. Drafz, Martin Nieger, Andreas Schmidt   +4 more
doaj   +1 more source

Silver N-heterocyclic carbenes

, 2011
Silver(I) NHC complexes are widely interested class of compounds due to their transmetallation and medicinel abilities. In contrast to other metalles, silver(I) NHCs are stable toward oxygen and moisture of the air.In this dissertation our main aim is to synthesis new kinds of silver(I) NHCs and to test them for their catalytic abilities.
openaire   +2 more sources

Main Group Metals in Redox Catalysis

European Journal of Inorganic Chemistry, EarlyView.
Main group metal redox catalysis is emerging as a credible alternative to transition metal chemistry. Elements from groups 13 to 15 now enable diverse catalytic manifolds, driven by ligand design and control of electronic structure. This review highlights recent advances, key design principles, and remaining challenges, positioning main group metals as
Olympia Mouriki, Alba Martinez‐Bascuñana, Oriol Planas   +2 more
wiley   +1 more source

Rhodium‐Catalyzed Carbene Transfer to Isocyanides Using Zinc Carbenoids

European Journal of Organic Chemistry, EarlyView.
A diazo‐free rhodium‐catalyzed carbene transfer to isocyanides using zinc carbenoids generated from α‐acyloxy halides is reported. This mild protocol furnishes ketenimines that can either be hydrolyzed to amides or intercepted with trimethylsilyl azide or carboxylic acids to give tetrazoles and imides, respectively.
Thomas R. Roose, Guillaume Voegeli, Max C. M. de Vries, Jordy M. Saya, Romano V. A. Orru, Eelco Ruijter   +5 more
wiley   +1 more source

N‐Heterocyclic Carbenes and N‐Heterocycles as Synthetic Reagents and Building Blocks

Chemistry – A European Journal
AbstractN‐Heterocyclic carbenes (NHCs) have become important tools in modern synthetic chemistry due to their versatility as organocatalysts and ligands in organometallic complexes. Since their first isolation and characterization, NHCs have demonstrated significant utility in various catalytic processes, offering advantages such as strong σ‐electron ...
Emily Jacobs, Thanh Vinh Nguyen
openaire   +2 more sources

A Solvent‐Free Synthesis of Imidazo[1,5‐a]pyridines Using CCl4 as an Oxidant

Journal of Heterocyclic Chemistry, EarlyView.
A solvent‐free synthesis of imidazo[1,5‐a]pyridines (Impys) using CCl4 as an oxidant reagent and DBU as the base is informed. An array of Impys derived from different benzylic, heteroaryl aldehydes and others was synthesized in moderate to good yields.
Alejandro Castillo‐Baltazar, Luis E. Mendoza‐Herrera, Alfredo Toscano, J. Armando Luján‐Montelongo, M. Carmen Ortega‐Alfaro, José G. López‐Cortés   +5 more
wiley   +1 more source

University teaching of mass spectrometry as a key practical technique within the context of a fully integrated, spiral curriculum

Rapid Communications in Mass Spectrometry, EarlyView.
Rationale Mass spectrometry (MS) is introduced to high school students in the UK in many pre‐university course syllabi. As such, we have identified the use of MS as a key technique that should be taught practically to undergraduates from the outset of their studies.
Andrew F. Worrall, Craig D. Campbell, Megan O. Midson, Malcolm I. Stewart   +3 more
wiley   +1 more source