Results 31 to 40 of about 2,685,093 (235)
Bis(3,5-diamino-4H-1,2,4-triazol-1-ium) 3,4-dioxocyclobutane-1,2-diolate
Acta Crystallographica Section E, 2013 The asymmetric unit of the title compound, 2C2H6N5+·C4O42−, contains two 3,5-diamino-4H-1,2,4-triazolium cations and one squarate dianion. The squaric acid molecule donated one H atom to each of the two 3,5-diamino-1,2,4-triazole molecules at ...
Ededet Eno +4 more
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, 2016 The synthesis of squaric acid N-hydroxylamide esters 5 and amides 6 from dimethyl squarate 2a is described. These derivatives are analogues of the naturally occurring iron(III) chelator hydroxamic acid.
Nathaniel C. Lim (1696786) +3 more
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1-(Imidazo[1,2-a]pyridin-1-ium-1-yl)-2,3,4-trioxocyclobutan-1-ide
Molbank, 2019 1-(Imidazo[1,2-a]pyridin-1-ium-1-yl)-2,3,4-trioxocyclobutan-1-ide was obtained by reaction of squaric acid with imidazo[1,2-a]pyridine in acetic anhydride.
Johann Grünefeld +2 more
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2,3,4-Trioxo-1-(1H-pyrrolo[2,3-b]pyridin-7-ium-7yl)-cyclobutan-1-ide
Molbank, 2018 2,3,4-Trioxo-1-(1H-pyrrolo[2,3-b]pyridin-7-ium-7-yl)-cyclobutan-1-ide was obtained by reaction of squaric acid with 7-azaindole in acetic anhydride.
Duc Hoàng Lande +2 more
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(E)-2-(1-Cyano-2-methoxy-2-oxoethylidene)-3,4-dioxo-1-(pyridin-1-ium-1-yl)cyclobutan-1-ide
Molbank, 2017 (E)-2-(1-Cyano-2-methoxy-2-oxoethylidene)-3,4-dioxo-1-(pyridin-1-ium-1-yl)cyclobutan-1-ide was obtained by a three-component reaction of squaric acid dichloride with pyridine and methyl cyanoacetate.
Johann Grünefeld +2 more
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Squaraine-Based Optical Sensors: Designer Toolbox for Exploring Ionic and Molecular Recognitions
Chemosensors, 2021 Small molecule-based chromogenic and fluorogenic probes play an indispensable role in many sensing applications. Ideal optical chemosensors should provide selectivity and sensitivity towards a variety of analytes.
Daniel D. Ta, Sergei V. Dzyuba
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Environment Sensitive Probes Based on Squaric Acid Scaffolds
, 2021 Environment-sensitive probes are desirable molecules due to their ability to respond to changes in media. These responses can be measured via photophysical properties such as absorbance and emission, as factors such as polarity and viscosity change.
Edwards, Lauren
core
Synthese und Reaktivität von Quadratsäure-Iminiumchloriden
CHIMIA, 1972 Reaction of substituted diamides of squaric acid with various halogenating agents such as thionyl chloride or carbonyl chloride yields the halogenated compounds 4 ⇄ 5 (X = Cl-), which can be converted to the iminium halides 5a-d by addition of antimony ...
Gunther Seitz, Hartmut Morck
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Development of synthesis of novel heteroaromatic squaric acid derivatives
, 2021 U sklopu ovog rada provedena je sinteza dva derivata skvareinske kiseline, kroz nekoliko koraka. U prvom stupnju provedena je reakcija aminacije uz 4-benzilpiperidin kao sekundarni amin i 1-brom-3,5-dimetoksibenzen.
Gašparić, Davor
core +3 more sources
Biomolecules, 2019 Tacrine was the first drug to be approved for Alzheimer’s disease (AD) treatment, acting as a cholinesterase inhibitor. The neuropathological hallmarks of AD are amyloid-rich senile plaques, neurofibrillary tangles, and neuronal degeneration.
Barbora Svobodova +10 more
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