• No se han encontrado resultados

Coupling reactions

Vinylic Addition Polynorbornene as a Support for N-Heterocyclic Carbene Palladium Complexes: Catalytic Activity in C–C Cross– Coupling Reactions

Vinylic Addition Polynorbornene as a Support for N-Heterocyclic Carbene Palladium Complexes: Catalytic Activity in C–C Cross– Coupling Reactions

... Vinylic addition polynorbornene is a useful catalyst support for C-C coupling reactions. A functionalized VA-PNB with an N- heterocyclic carbene coordinates to palladium to give [(VA-PNB- NHC)Pd(allyl)Cl)] ...

9

TítuloTriorganoindium reagents in Rh catalyzed C–H activation/C–C cross coupling reactions of 2 arylpyridines

TítuloTriorganoindium reagents in Rh catalyzed C–H activation/C–C cross coupling reactions of 2 arylpyridines

... catalytic reactions using transition metals is an important challenge in organic chemistry in which the intermediates are related to those produced in the classical cross-coupling ...metal-catalyzed ...

12

TítuloSequential In catalyzed intramolecular hydroarylation and Pd catalyzed cross coupling reactions using bromopropargyl aryl ethers and amines

TítuloSequential In catalyzed intramolecular hydroarylation and Pd catalyzed cross coupling reactions using bromopropargyl aryl ethers and amines

... lysis o ff ers significant advantages in terms of cost and low tox- icity. 6 Interestingly, the reaction of halopropargyl aryl ethers gives 4-halo-2H-chromenes in high yields without 1,2-halogen migration, a side reaction ...

7

Vinylic addition polynorbornene as catalyst support: applications in organocatalysis and palladium-catalyzed c-c coupling reactions

Vinylic addition polynorbornene as catalyst support: applications in organocatalysis and palladium-catalyzed c-c coupling reactions

... some time (hours generally) without considering the possibility that the reaction finishes in shorter times. When this is the case and complete conversion is reached long before, subsequent runs with the same reaction ...

231

Reactive Palladium Carbenes: Migratory Insertion and Other Carbene-Hydrocarbyl Coupling Reactions on Well-Defined Systems

Reactive Palladium Carbenes: Migratory Insertion and Other Carbene-Hydrocarbyl Coupling Reactions on Well-Defined Systems

... palladium-catalyzed reactions have been extended to the use of carbene precursors that can be functionalized with the formation of several C-C bonds in one reaction ...carbene-hydrocarbyl coupling occurs in ...

14

TítuloSynthesis of bench stable solid triorganoindium reagents and reactivity in palladium catalyzed cross coupling reactions

TítuloSynthesis of bench stable solid triorganoindium reagents and reactivity in palladium catalyzed cross coupling reactions

... the coupling products in good ...the reactions. Other solvents can be used in the coupling reactions and this demonstrates the versatility and utility of these solid ...

9

TítuloFerrocenylindium reagents in palladium‐catalyzed cross‐coupling reactions: asymmetric synthesis of planar chiral 2‐aryl oxazolyl and sulfinyl ferrocenes

TítuloFerrocenylindium reagents in palladium‐catalyzed cross‐coupling reactions: asymmetric synthesis of planar chiral 2‐aryl oxazolyl and sulfinyl ferrocenes

... The synthetic utility of ferrocenylindium reagents in palladium‐catalyzed cross‐coupling reactions was also tested for the stereoselective synthesis of planar chiral 1,2‐disubstituted ferrocenes. Ferrocene ...

9

TítuloTriorganoindium reagents in cross coupling reactions: transition metal free reactions with benzopyranyl acetals and tetrahydroisoquinolines and solid stable organometallics

TítuloTriorganoindium reagents in cross coupling reactions: transition metal free reactions with benzopyranyl acetals and tetrahydroisoquinolines and solid stable organometallics

... cross-coupling reactions, and are valued for their chemoselectivity, versatility, and atom economy derived from their ability to transfer the three organic groups attached to ...

315

Electrochemical coupling reactions of benzyl halides on a powder cathode and cavity cell

Electrochemical coupling reactions of benzyl halides on a powder cathode and cavity cell

... because of its good reactivity in related aqueous Barbier-type reac- tions [15]. First, the reduction potential of 2 in the cavity cell was determined by voltammetry (Fig. 1C). On pure graphite a sharp peak was observed ...

5

Hydroacylation and C-N Coupling Reactions. Mechanistic Studies and Application in the Nucleoside Synthesis

Hydroacylation and C-N Coupling Reactions. Mechanistic Studies and Application in the Nucleoside Synthesis

... The ring-forming reactions are important and common processes in organic chemistry. Baldwin elucidated a set of simple empirical rules that he had found useful in predicting the relative facility of different ring ...

212

The stille reaction, 38 years later

The stille reaction, 38 years later

... (11) Selected books with chapters related to the Stille Reaction: (a) The Stille Reaction; Farina, V., Krishnamurthy, V., Scott, W. K.; Wiley: New York, 2004; originally published as Org. React. 1997, 50, 1–652. (b) ...

14

THE DYNAMIC COUPLING FACTOR FOR LONGITUDINAL MODES

THE DYNAMIC COUPLING FACTOR FOR LONGITUDINAL MODES

... In order to show that the previous result is independent on the wave propagation direction, we now compute the dynamic coupling factor for a piezoelectric element vibrating in a transverse, for example in the ...

6

Students emotions in the ELT classroom

Students emotions in the ELT classroom

... Because of the nature of the study it was not possible to create or develop a strategy that allowed students to deal with their emotions and take advantage of the effect or influence caused by their reactions ...

96

A novel cell-coupling leading to nonlocal interactions

A novel cell-coupling leading to nonlocal interactions

... Contrary to the case of local interactions, here the choice of boundary conditions have deep consequences in the shape of the interacting functions and the resulting behavior. The boundary conditions, in some cases can ...

11

Thermomagnetic evolution of the QCD strong coupling

Thermomagnetic evolution of the QCD strong coupling

... strong coupling increases with the field ...strong coupling decreases as a function of the field ...strong coupling accounts for the competition of magnetic and thermal energy scales much below μ ...

6

Analysis and Simulation of the Leg of an Hexapod Robot for Remote Exploration

Analysis and Simulation of the Leg of an Hexapod Robot for Remote Exploration

... • i-;Ti IOM ,-vr ^ v. Reactions Matlab results. Maximum force values for each reaction. wins the ground reactions we can proceed to the section s.were we obtain the rest of the desired[r] ...

7

Lingin depolymerization by supercritical water ultrafast reactions

Lingin depolymerization by supercritical water ultrafast reactions

... chemical because of its properties, pharmacological applications, and use as chemical intermediate for the synthesis of other products. However, the selective transformation of lignin into high value products still ...

201

Kinetic and thermodynamic studies on transmetalation reactions

Kinetic and thermodynamic studies on transmetalation reactions

... According to the experimental data, a second pathway of reaction has to be proposed to account for a consumption of intermediate B, with an activation energy value of 26.8 kcal mol -1 . This second pathway can lead to ...

220

Considerations on immunization anxiety related reactions in clusters

Considerations on immunization anxiety related reactions in clusters

... Vaccine-related reactions are attributable either to the vaccine as a biopharmaceutical product due to unexpected or expected adverse reactions to the product or associated to quality defects in the ...

5

Show all 421 documents...

Related subjects