Results 121 to 130 of about 25,864 (264)

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

New Approaches to N‑Heterocyclic-Carbene-Coordinated Iminoborane and Borenium Species

, 2020
The synthesis, characterization, and reactivity of an iminoborane–N-heterocyclic carbene (NHC) adduct were described. The reaction of DmpNHB­(OEt)­Br [1; Dmp = 2,6-bis­(2,4,6-trimethylphenyl)­phenyl] with 2 equiv of 1,3-diimethyl-4,5-dimethylimidazol-2 ...
Chunming Cui (1446892), Ping Cui (249198), Lingbing Kong (2249812), Rui Guo (134395)   +3 more
core   +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

Migratory insertion in N-heterocyclic carbene complexes of palladium; an experimental and DFT study

, 2003
The first authenticated example of migration of a methyl group from palladium(II) to a coordinated N-heterocyclic carbene is ...
Green, JC, Jennifer C Green (16061285), Green, Jennifer, Green, J.C., Andreas A Danopoulos (16289159), Hursthouse, MB, Michael B Hursthouse (10830813), Tsoureas, N., Danopoulos, A.A., Danopoulos, AA, Nikolaos Tsoureas (4462867), Hursthouse, M.B., Tsoureas, N   +12 more
core   +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

Copper N-heterocyclic carbene (NHC) complexes as carbene transfer reagents

, 2010
A method is described that makes use of easily prepared, inexpensive copper synthons as N-heterocyclic carbene (NHC) transfer agents to generate catalytically relevant gold and palladium ...
Cazin, Catherine, Marc R. L. Furst, Cazin, Catherine S.J., Furst, Marc RL, Catherine S. J. Cazin, Furst, Marc Robert Laurent   +5 more
core   +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

Creating a Masterpiece. The Road to (and Beyond) Woodward and Hoffmann's 1969 Angewandte Chemie Treatise

The Chemical Record, EarlyView.
This publication describes how R. B. Woodward and Roald Hoffmann crafted their masterpiece publications. Illustrations include Woodward's first draft of the famous “Violations There are none. Nor can violations be expected of so fundamental a principle of maximum bonding.” Original but discarded text shows the stepwise paths toward the W‐H masterpieces.
Jeffrey I. Seeman
wiley   +1 more source

Dimethyl‐, Diethyl‐, and Propylene Carbonates: An Emerging Class of Green Solvents for Organic Synthesis

The Chemical Record, EarlyView.
This review highlights recent advances in the use of organic carbonates, dimethyl carbonate (DMC), diethyl carbonate (DEC), and propylene carbonate (PC), as solvents in organic synthesis. Based on over seventy studies from the past 6 years, it shows their application in different organic reaction types, emphasizing their role in safer and more ...
Gabriela T. Quadros, Livia C. L. Valente, Thiago Barcellos, Daniela Hartwig, Laura Abenante, Eder J. Lenardão   +5 more
wiley   +1 more source