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pyrazine/ataque epiléptico
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13 resultados
8-Methylureido-4,5-dihydro-4-oxo-10H-imidazo[1,2-a]indeno[1,2-e]pyrazines: highly potent in vivo AMPA antagonists.
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A novel series of readily water soluble 8-methylureido-4,5-dihydro-4-oxo-10H-imidazo[1,2-a]indeno[1,2-e]++ +pyrazines were synthesized. The -10-yl acetic acid ((+)-3) and -10-carboxylidene (4) derivatives exhibit potent affinities (IC50=4 and 19 nM, respectively) and antagonist properties (IC50 = 2
8-Amino-3-benzyl-1,2,4-triazolo[4,3-a]pyrazines. Synthesis and anticonvulsant activity.
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Eleven substituted 8-amino-3-benzyl-1,2,4-triazolo[4,3-a] pyrazines were synthesized and tested for anticonvulsant activity against maximal electroshock-induced seizures (MES) in rats. The compounds were prepared in four stages from the phenylacetonitriles. I. The intermediate
Novel fluorinated pyrrolo[1,2-a]pyrazine-2,6-dione derivatives: synthesis and anticonvulsant evaluation in animal models of epilepsy.
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A series of fluorinated analogs of the potent investigative anticonvulsant agent (4S,8aS)-4-phenylperhydropyrrolo[1,2-a]pyrazine-2,6-dione 1 was prepared and characterized by IR, 1H, 13C NMR and mass spectral data. The compounds have been evaluated in the in vivo rodent models of epilepsy. They
Serotonin(2C) receptors appear to mediate genetic sensitivity to cocaine-induced convulsions.
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BACKGROUND
C57BL/6ByJ (6ByJ) and C57BL/6J (6J) mice differ in their sensitivity to cocaine-induced convulsions, with CD(50) values being 100 and 70 mg/kg, respectively. This genetic sensitivity to cocaine-induced convulsions is probably related to 5-HT(2) receptors, since the density of these sites
Synthesis and anticonvulsant activity of novel 2,6-diketopiperazine derivatives. Part 1: perhydropyrrole[1,2-a]pyrazines.
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A number of novel pyrrole[1,2-a]pyrazine derivatives were synthesized and evaluated in in vivo animal models of epilepsy. Among them, several compounds displayed promising seizure protection in the maximal electroshock seizure (MES), subcutaneous metrazol seizure (scMET), 6 Hz and
Spiro-imidazo[1,2-a]indeno[1,2-e]pyrazine-4-one derivatives are mixed AMPA and NMDA glycine-site antagonists active in vivo.
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Original spiro-imidazo[1,2-a]indeno[1,2-e]pyrazine-4-one derivatives were synthesised and led to the identification of 3e which showed good affinities for both the AMPA and the NMDA glycine-site receptors, and displayed good anticonvulsant effects after i.p. and i.v. administrations in the
Discovery of Imidazo[1,2-a]pyrazines and Pyrazolo[1,5-c]pyrimidines as TARP γ-8 Selective AMPAR Negative Modulators.
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This report discloses the discovery and characterization of imidazo[1,2-a]pyrazines and pyrazolo[1,5-c]pyrimidines as selective negative modulators of α-amino-3-hydroxy-5-methylisoxazole-4-propionate receptors (AMPARs) associated with transmembrane AMPAR regulatory protein γ-8.
Synthesis and anticonvulsant activity of novel 2,6-diketopiperazine derivatives. Part 2: Perhydropyrido[1,2-a]pyrazines.
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A new series of chiral pyrido[1,2-a]pyrazine derivatives was synthesised and evaluated in in vivo animal models of epilepsy. A significant influence of the stereochemistry of the pyrido[1,2-a]pyrazine framework on the pharmacological activity was observed. Compounds with (4R,9aS) absolute
Structure-activity relationships of the aromatic site in novel anticonvulsant pyrrolo[1,2-a]pyrazine derivatives.
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Novel, chiral derivatives of pyrrolo[1,2-a]pyrazine with aromatic substituents at carbon C-4 were synthesized by a short synthetic sequence involving Ugi multicomponent reaction. The compounds were evaluated for their in vivo efficacy in animal models of epilepsy within the Anticonvulsant Screening
Synthesis and anticonvulsant activity of some new pyrazolo[3,4-b]pyrazines and related heterocycles.
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A series of new pyrazolo[3,4-b]pyrazines containing, 1,2,4-oxadiazolyl, thiadiazolyl, imidazothiadiazolyl, thiazolidinonyl, substituents and other different substituents, was synthesized using 1,6-diphenyl-3-methyl-lH-pyrazolo[3,4-b]pyrazine-5-carbonitrile (2) as a starting material. Some of the
Synthesis of new perhydropyrrolo[1,2-a]pyrazine derivatives and their evaluation in animal models of epilepsy.
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A series of novel stereochemically pure derivatives of the investigative broad-spectrum anticonvulsant ADD408003 was designed and synthesized. Five-center four-component (U-5C-4CR) and four-center three-component (U-4C-3CR) variants of Ugi reaction were used in the key step of the synthetic
8-Methylureido-10-amino-10-methyl-imidazo[1,2-a]indeno[1,2-e] pyrazine-4-ones: highly in vivo potent and selective AMPA receptor antagonists.
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Water soluble 8-methylureido-10-amino-10-methyl-imidazo[1,2-a]indeno[1,2-e]pyraz ine-4-one 4 represents a novel class of highly potent and selective AMPA receptors antagonists with in vivo activity. The dextrorotatory isomer (+)-4 was found to display the highest affinity with an IC50 of 10 nM. It
4,10-Dihydro-4-oxo-4H-imidazo[1,2-a]indeno[1,2-e]pyrazin-2-carboxylic acid derivatives: highly potent and selective AMPA receptors antagonists with in vivo activity.
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A novel series of 2-substituted-4,5-dihydro-4-oxo-4H-imidazo[1,2-a]indeno[1,2-e]pyrazine derivatives was synthesised. One of them, 4e-a highly water soluble compound exhibited a nanomolar affinity and demonstrated competitive antagonist properties at the ionotropic AMPA receptors. This compound also
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