نتایج جستجو برای: friedländer hetero annulation

تعداد نتایج: 5992  

2017
Sophie Racine Jérémy Vuilleumier Jérôme Waser

Nucleoside analogues are widely employed as bioactive compounds against cancer and viral infections. Consequently, it is important to develop efficient synthetic methods to access them with high efficiency and structural diversity. Herein, we present a full account of our work on the synthesis of nucleoside analogues via annulations of donor acceptor aminocyclopropanes and aminocyclobutanes. Th...

Journal: :The Biochemical journal 2002
Douglas Ramsay Elaine Kellett Mary McVey Stephen Rees Graeme Milligan

Homo- and hetero-oligomerization of G-protein-coupled receptors (GPCRs) were examined in HEK-293 cells using two variants of bioluminescence resonance energy transfer (BRET). BRET(2) (a variant of BRET) offers greatly improved separation of the emission spectra of the donor and acceptor moieties compared with traditional BRET. Previously recorded homo-oligomerization of the human delta-opioid r...

2015
Catherine Dostert Thomas J. J. Müller

2,6-Di(hetero)aryl and 2-(hetero)aryl substituted dithienothiazines are prepared from N-aryl dithienothiazines by a lithiation–lithium–zinc exchange–Negishi cross-coupling sequence with (hetero)aryl iodides in a one-pot fashion in good to excellent yields. These novel extended π-electron systems can be reversibly oxidized and fine-tuned in their electronic properties as supported by cyclo volta...

2015
Daniel T. Cohen Stephen L. Buchwald

A mild, efficient, and low-temperature palladium-catalyzed cyanation of (hetero)aryl halides and triflates is reported. Previous palladium-catalyzed cyanations of (hetero)aryl halides have required higher temperatures to achieve good catalytic activity. This current reaction allows the cyanation of a general scope of (hetero)aryl halides and triflates at 2-5 mol % catalyst loadings with tempera...

Journal: :Molecular Vision 2009
Takumi Takata Luke G. Woodbury Kirsten J. Lampi

PURPOSE Cataracts are a major cause of blindness worldwide. A potential mechanism for loss of visual acuity may be due to light scattering from disruption of normal protein-protein interactions. During aging, the lens accumulates extensively deamidated crystallins. We have previously reported that deamidation in the betaA3-crystallin (betaA3) dimer decreased the stability of the dimer in vitro....

2015
Emilien Demory Karthik Devaraj Andreas Orthaber Paul J Gates Lukasz T Pilarski

(Pinacolato)boryl ortho-silyl(hetero)aryl triflates are presented as a new class of building blocks for arylation. They demonstrate unique versatility by delivering boronate or (hetero)aryne reactivity chemoselectively in a broad range of transformations. This approach enables the unprecedented postfunctionalization of fluoride-activated (hetero)aryne precursors, for example, as substrates in t...

Journal: :Catalysts 2021

Isoquinolones (isoquinolin-1(2H)-ones) are one of the important nitrogen-heterocyclic compounds having versatile biological and physiological activities, their synthetic methods have been recently developed greatly. This short review illustrates significant advances in construction isoquinolone ring with atom- step-economy, focusing on intermolecular annulation protocols intramolecular cyclizat...

Journal: :physical chemistry and electrochemistry 0

experimental results of dielectric investigations for binary mixtures of 2, 3-butanediol, 2, 3-bd, in2-ethyl-1-hexanol, 2eh, were reported for various mole fractions and temperatures (298.2-308.2) kand they were used to calculate dielectric parameters such as kirkwood correlation factor, excesspermittivity and bruggeman parameter. these parameters were used to carry out temperaturedependent die...

2017
Yang Young Lu Jinchi Lv Jed A. Fuhrman Fengzhu Sun

High-throughput technologies have led to large collections of different types of biological data that provide unprecedented opportunities to unravel molecular heterogeneity of biological processes. Nevertheless, how to jointly explore data from multiple sources into a holistic, biologically meaningful interpretation remains challenging. In this work, we propose a scalable and tuning-free prepro...

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