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[PDF] Top 20 N-HETEROCYCLIC CARBENES: FROM DESIGN TO SYNTHESIS AND THEIR APPLICATION AS NUCLEOPHILIC CATALYSTS

Has 10000 "N-HETEROCYCLIC CARBENES: FROM DESIGN TO SYNTHESIS AND THEIR APPLICATION AS NUCLEOPHILIC CATALYSTS" found on our website. Below are the top 20 most common "N-HETEROCYCLIC CARBENES: FROM DESIGN TO SYNTHESIS AND THEIR APPLICATION AS NUCLEOPHILIC CATALYSTS".

N-HETEROCYCLIC CARBENES:  FROM DESIGN TO SYNTHESIS AND THEIR APPLICATION AS  NUCLEOPHILIC CATALYSTS

N-HETEROCYCLIC CARBENES: FROM DESIGN TO SYNTHESIS AND THEIR APPLICATION AS NUCLEOPHILIC CATALYSTS

... the nucleophilic carbene to react with an added electrophile in preference to the ...with N-sulfonyl aldimines (112) in conjunction with an imidazolium- derived carbene (44•Cl), preferential formation of ... See full document

429

Polar organometallic strategies for regioselective C-H metallation of N-heterocyclic Carbenes

Polar organometallic strategies for regioselective C-H metallation of N-heterocyclic Carbenes

... evolved from mere curiosities to valuable precursors to access neutral abnormal NHC complexes of a wide range of metal fragments as well as facilitating the synthesis of novel non-symmetrical NHC ligands ... See full document

8

Improved Synthesis and New Applications of N-Heterocyclic Carbenes for Catalysis.

Improved Synthesis and New Applications of N-Heterocyclic Carbenes for Catalysis.

... reaction catalysts, Breslow observed in 1958 that rapid C(2) proton-deuterium exchange of thiazolium salts could occur under mild conditions, noting that the C(2) carbon has anionic character under such ... See full document

76

Development of N-Heterocyclic Carbenes as Organic Catalysts and Efficient Ligands in Palladium Mediated Transformations

Development of N-Heterocyclic Carbenes as Organic Catalysts and Efficient Ligands in Palladium Mediated Transformations

... Palladium-NHC catalysts were extensively employed in catalysis of Heck coupling 51,52 with a report by Calo with thiazolium carbene-palladium catalyst for Heck ... See full document

293

DESIGN, SYNTHESIS AND CHARACTERIZATION OF ZEOLITES AND MESOPOROUS MOLECULAR SIEVE CATALYSTS FOR SELECTIVE SYNTHESIS OF HETEROCYCLIC DRUG INTERMEDIATES

DESIGN, SYNTHESIS AND CHARACTERIZATION OF ZEOLITES AND MESOPOROUS MOLECULAR SIEVE CATALYSTS FOR SELECTIVE SYNTHESIS OF HETEROCYCLIC DRUG INTERMEDIATES

... for synthesis of polymers, automobiles and textile industries ...structures from wide range of different ...their application range beyond the traditional use as catalysts and ...ranging ... See full document

19

The Design, Synthesis, and Application of Ruthenium Metathesis Catalysts for the Preparation of Small Molecules and Polymers

The Design, Synthesis, and Application of Ruthenium Metathesis Catalysts for the Preparation of Small Molecules and Polymers

... stable N-aryl, N-alkyl N-heterocyclic carbene (NHC) ruthenium catalysts were designed and synthesized for latent olefin ...These catalysts showed excellent latent behavior toward ... See full document

188

The influence of heteroatom substitution on heterocyclic carbenes and their complexes

The influence of heteroatom substitution on heterocyclic carbenes and their complexes

... Appendix D Cartesian Coordinates of Structures from Chapter Six D.1 Carbenes D.2 Protonated Carbenes Azolium Salts D.3 Complexes D.4 Transition Structures D.5 Products D.6 Separated Prod[r] ... See full document

259

Rate and equilibrium constants for the addition of N Heterocyclic Carbenes into benzaldehydes : a remarkable 2 substituent effect

Rate and equilibrium constants for the addition of N Heterocyclic Carbenes into benzaldehydes : a remarkable 2 substituent effect

... obtained from kinetic analysis and fitting data for both the forward and backwards processes show that nucleophilic addition into benzaldehydes bearing a 2-heteroatom substituent is particularly ... See full document

6

Synthesis and Application of Heterocyclic as ultraviolet Absorbers

Synthesis and Application of Heterocyclic as ultraviolet Absorbers

... Structures of synthesized compounds were elucidated by IR and UV. All reagents and solvents were obtained from Merck Chemical Inc. Melting points were measured with an Electrothermal 9100 apparatus. These data ... See full document

7

Copper N heterocyclic carbene complexes as active catalysts for the synthesis of 2 substituted oxazolines from nitriles and aminoalcohols

Copper N heterocyclic carbene complexes as active catalysts for the synthesis of 2 substituted oxazolines from nitriles and aminoalcohols

... copper N-heterocyclic carbene (NHC) complexes have emerged as active catalysts in a plethora of reactions that include [3+2] cycloaddition, 16 borylation of alkynes, 17 synthesis of phenols 18 ... See full document

14

Homogeneous gold catalysts : development of applications for gold(I) catalysts bearing N heterocyclic carbene ligands

Homogeneous gold catalysts : development of applications for gold(I) catalysts bearing N heterocyclic carbene ligands

... NHC from IMes to the more bulky and, due to backbone substitution, less flexible IPr Me and careful optimization of reaction ...generated catalysts with IMes•HCl afforded very good yields under these ... See full document

233

Organo- and Metal-Catalyzed Regioselective Allylic Substitution Using N-Heterocyclic Carbenes.

Organo- and Metal-Catalyzed Regioselective Allylic Substitution Using N-Heterocyclic Carbenes.

... of N-acyl protecting group to synthesize rhodium and iridium protic NHC ...the N-methyl-substituted N-acyl benzimidazole 4 and then this would react with a strong base in the presence of a copper ... See full document

86

Silica Sulfuric Acid as a Efficient and Recyclable Solid Acid Catalyst for the One-Pot Synthesis of 2,4,6-Triaylpyridines Under Solvent Free Conditions

Silica Sulfuric Acid as a Efficient and Recyclable Solid Acid Catalyst for the One-Pot Synthesis of 2,4,6-Triaylpyridines Under Solvent Free Conditions

... It was found that the yield of compound 4a was affected by the catalyst amount and reaction temperature. Trace product was obtained in the absence of the catalyst (Entry 1) or in the presence of the catalyst at room ... See full document

5

Light stable silver N Heterocyclic carbene catalysts for the alkynylation of ketones in air

Light stable silver N Heterocyclic carbene catalysts for the alkynylation of ketones in air

... Comparison of the four complexes, in water, using 2.5 mol% loading, shows that, whilst the Cu catalysts are moderately active, the Ag analogues lead in quantitative manner to the propargylic alcohol (Table 1, ... See full document

6

Irish Chemical News

Irish Chemical News

... When we submitted this paper to Angewandte Chemie it was necessary to come up with a catch phrase to describe the work as part of the abstract. It was Friday July 3, 2009 and the semi-final of Wimbledon with Roger ... See full document

68

Synthesis of Heterocyclic Compounds by the Application of Radical Cyclization

Synthesis of Heterocyclic Compounds by the Application of Radical Cyclization

... alternative and more versatile reagent for radical cyclization. 20 Recently, Ce (IV) reagents, Ceric ammonium nitrate (CAN) and ceric-tetra-n-butylammonium nitrate (CTAN) are widely applied for the generation of ... See full document

11

Synthesis of non-aqueous ionic liquids derived from n-heterocyclic compounds

Synthesis of non-aqueous ionic liquids derived from n-heterocyclic compounds

... dan N-fenilmaleimida (47), tindak balas antara 3-sulfolena (49) dengan N-fenilmaleimida (47) telah menghasilkan satu produk tunggal N-fenil-4- sikloheksen-1,2-dikarboksimida ...dengan ... See full document

229

A Quantitative Analysis of Factors Influencing Ease of Formation and σ-Bonding Strength of Oxa- and Thia-N-Heterocyclic Carbenes.

A Quantitative Analysis of Factors Influencing Ease of Formation and σ-Bonding Strength of Oxa- and Thia-N-Heterocyclic Carbenes.

... of N-heterocyclic carbene (NHC) formation either by deprotonation of precursor salts to give neutral NHCs or deprotonation of heterocyclic mesomeric betaines to give anionic NHCs is ... See full document

15

Backbone tuning in indenylidene ruthenium complexes bearing an unsaturated N heterocyclic carbene

Backbone tuning in indenylidene ruthenium complexes bearing an unsaturated N heterocyclic carbene

... of N-heterocyclic carbenes (NHC) as spectator ligands in ruthenium-mediated olefin metathesis represents one of the most important breakthroughs in this field ...generation catalysts, ... See full document

7

Synthesis, Activation and Catalytic Activity of N-Heterocyclic Carbene Bearing Palladium Catalysts

Synthesis, Activation and Catalytic Activity of N-Heterocyclic Carbene Bearing Palladium Catalysts

... The first organomagnesium reagents were prepared over a hundred years ago by Grignard and still occupy an important place in organic chemistry. 252 Kumada 253 and Corriu 254 independently reported on their ... See full document

255

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