نتایج جستجو برای: imidazoles multicomponent nmr

تعداد نتایج: 72088  

2016
Sandra Kozak Lukas Lercher Megha N Karanth Rob Meijers Teresa Carlomagno Stephane Boivin

Maintaining a stable fold for recombinant proteins is challenging, especially when working with highly purified and concentrated samples at temperatures >20 °C. Therefore, it is worthwhile to screen for different buffer components that can stabilize protein samples. Thermal shift assays or ThermoFluor(®) provide a high-throughput screening method to assess the thermal stability of a sample unde...

2016
Emily R. Draper Jonathan R. Lee Matthew Wallace Frank Jäckel Alexander J. Cowan Dave J. Adams

We show that a perylene bisimide (PBI)-based gelator forms self-sorted mixtures with a stilbene-based gelator. To form the self-sorted gels, we use a slow pH change induced by the hydrolysis of glucono-d-lactone (GdL) to gluconic acid. We prove that self-sorting occurs using NMR spectroscopy, UV-Vis spectroscopy, rheology, and viscometry. The corresponding xerogels are photoconductive. Importan...

2004
J. Krtička

Since the acceleration of different wind species may be different, their wind velocities may differ and so hot star winds have a multicomponent nature. For high density winds (e.g. of galactic O stars) this multicomponent nature does not influence the wind structure, however for low density winds multicomponent effects occur, for example frictional heating, decoupling of wind components, etc. (...

1997
Victor Kac Johan van de Leur

We develop a formalism of multicomponent BKP hierarchies using elementary geometry of spinors. The multicomponent KP and the modified KP hierarchy (hence all their reductions like KdV, NLS, AKNS or DS) are reductions of the multicomponent BKP.

Journal: :Molecules 2017
Saumya Dabral Mathias Turberg Andrea Wanninger Carsten Bolm José G Hernández

A mechanochemical Strecker reaction involving a wide range of aldehydes (aromatic, heteroaromatic and aliphatic), amines, and KCN afforded a library of α-aminonitriles upon mechanical activation. This multicomponent process was efficiently activated by lignocellulosic biomass as additives. Particularly, commercially available Kraft lignin was found to be the best activator for the addition of c...

Journal: :Agricultural and Biological Chemistry 1983

Journal: :Chemical communications 2015
Anna Lee Karl A Scheidt

A highly efficient asymmetric formal [4+2] annulation for the synthesis of dihydrocoumarins has been developed via an in situ activated NHC catalysis. Both electrophilic and nucleophilic species are generated in situ simultaneously whereby acyl imidazoles facilitated rapid formation of an NHC-enolate intermediate to afford the [4+2] dihydrocoumarin adducts.

Journal: :The Journal of organic chemistry 2007
Liangbo Zhu Peng Guo Gaocan Li Jingbo Lan Rugang Xie Jingsong You

Relatively mild and highly efficient CuI-catalyzed N-arylation procedures for nitrogen-containing heterocycles (e.g., imidazoles, benzimidazoles, pyrroles, pyrazoles, indoles, triazoles, etc.) with aryl and heteroaryl halides have been developed. The protocols can be performed easily and tolerate a number of functional groups, such as ester, nitrile, nitro, ketone, free hydroxyl, and free prima...

Journal: :Journal of Molecular Structure 2022

A novel category of phosphate-phosphonate compounds is synthesized by a sequence multicomponent reactions strategy Kabachnik-Fields and Atherton-Todd reactions. All the designed products are obtained with good chemical yields in short reaction times, confirmed spectroscopy analyses. The diethyl [(4-diethylphosphate phenyl) (4-trifluoromethyl phenylamino) methyl] phosphonate 6g characterized sin...

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