Results 71 to 80 of about 14,653 (264)

Ring Expansion Of Alkylidenecarbenes Derived From Lactams, Lactones, And Thiolactones Into Strained Heterocyclic Alkynes: A Theoretical Study [PDF]

open access: yes, 2019
Strained cycloalkynes are of considerable interest to theoreticians and experimentalists, and possess much synthetic value as well. Herein, a series of cyclic alkylidenecarbenes—formally obtained by replacing the carbonyl oxygen of four-, five-, and six ...
Just, J.   +4 more
core   +1 more source

Self-Supported N-Heterocyclic Carbenes and Their Use as Organocatalysts

open access: yesMolecules, 2016
The study of N-heterocyclic carbenes (NHCs) as organocatalysts has proliferated in recent years, and they have been found to be useful in a variety of reactions.
Shuang Ma, Patrick H. Toy
doaj   +1 more source

The promise of N-heterocyclic carbenes to capture and valorize carbon dioxide

open access: yesSustainable Chemistry for Climate Action, 2023
With increasing environmental concerns due to the anthropologic emissions of greenhouse gasses, especially carbon dioxide (CO2), the development of new technologies to capture the latter is of great public value. While amino-containing materials excel in
Pierre Stiernet   +3 more
doaj   +1 more source

Aerobic Oxidative N‐Heterocyclic Carbene Catalysis

open access: yesThe Chemical Record, 2023
AbstractThe ease with which simple starting materials can be transformed into highly functionalized products has made oxidative N‐heterocyclic carbene (NHC) catalysis an area of significant interest. However, the use of stoichiometric amounts of high molecular weight oxidants in most reactions generates an undesired equivalent amount of waste.
Simon Stenkvist   +3 more
openaire   +2 more sources

Types and properties of metal-free catalysts for living polymerizations of biomaterials [PDF]

open access: yes, 2008
Syntéza biokompatibilních a biodegradabilních polyesterů, použitelných převážně v medicíně, využívá pro polymeraci za otevření kruhu katalyzátory na bázi kovu (např. Sn, Al atd.), které se mohou po implantaci deponovat v těle.
Repka, Martin
core  

N-Heterocyclic carbene-stabilised arsinidene (AsH) [PDF]

open access: yesChemical Communications, 2017
N-Heterocyclic carbene adducts of the parent arsinidene (AsH) were prepared by two different synthetic routes, either by reaction of As(SiMe3)3 with 2,2-difluoroimidazolines followed by desilylation or by reaction of [Na(dioxane)3.31][AsCO] with imidazolium chlorides.
Adinarayana Doddi   +6 more
openaire   +3 more sources

First direct evidence of N-heterocyclic carbene in BMIm acetate ionic liquid. An electrochemical and chemical study on the role of temperature [PDF]

open access: yes, 2017
Cyclic voltammetry provides the first direct evidence of N-­heterocyclic carbene (NHC) presence in neat 1-‐butyl-­3-­methylimidazolium acetate ionic liquid (BMImAcO) at 120°C. The NHC existence, proved by its oxidation current in cyclic voltammetry, was
Chiarotto, I., Feroci, M., Inesi, A.
core   +1 more source

Synthesis and Coordination Compounds of A Bis(Imino)Acenaphthene (Bian)-Supported N-Heterocyclic Carbene [PDF]

open access: yes, 2010
The bis(imino)acenaphthene-supported N-heterocyclic carbene IPr(BIAN) has been prepared by deprotonation of the precursor imidazolium chloride. Treatment of IPr(BIAN) imidazolium chloride with Ag(2)O afforded the silver complex [IPr(BIAN)]AgCl which can ...
Abernethy, Colin D.   +3 more
core   +1 more source

Synthesis and Study of Olefin Metathesis Catalysts Supported by Redox-Switchable Diaminocarbene 3 Ferrocenophanes [PDF]

open access: yes, 2013
A redox-switchable ligand, N,N'-dimethyldiaminocarbene[3]ferrocenophane (5), was synthesized and incorporated into a series of Ir- and Ru-based complexes.
Bielawski, Christopher W.   +4 more
core   +1 more source

Electrogenerated N-Heterocyclic Carbene in Ionic Liquid: An Insight into the Mechanism of the Oxidative Esterification of Aromatic Aldehydes [PDF]

open access: yes, 2014
An N-heterocyclic carbene (NHC), generated by cathodic reduction of BMImBF4, mediates the oxidative esterification of aromatic aldehydes with organic bromides in the corresponding ionic liquid as solvent. The product recovery by simple extractive work-up
CHIAROTTO, Isabella   +4 more
core   +1 more source

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