Hydrazones
Mostrando 1-12 de 25 artigos, teses e dissertações.
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1. SÍNTESE, ATIVIDADE ANTILESHMANIA E CITOTÓXICA DE HIDRAZONAS DERIVADAS DE ALDEÍDOS NATURAIS
Leishmaniasis is endemic anthropozoonosis considered to be a severe public health problem. The treatment with pentavalent antimonials presents high toxicity motivating the search for effective and less toxic drugs. Hydrazones and N-acylhydrazones are functional groups that are prominent in Medicinal Chemistry, including as antiprotozoals. In this context, fi
Quím. Nova. Publicado em: 2020-01
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2. Crystal Structures of 1-Aryl-1H- and 2-Aryl-2H-1,2,3-triazolyl Hydrazones. Conformational Consequences of Different Classical Hydrogen Bonds
The crystal structures of (Z)-1-phenyl-4-[((2-phenylhydrazono)methyl)]-1H-1,2,3-triazole, (Z)-4-[(2-(2,4-dimethylphenyl)hydrazono)methyl]-2-phenyl-2H-1,2,3-triazole, (E)-4-[(2-(2,4-dinitrophenyl)hydrazono)methyl]-2-phenyl-2H-1,2,3-triazole, and (E)-N'-((2-phenyl-2H-1,2,3-triazol-4-yl)methylene)isonicotinohydrazide dihydrate are reported. The formations of (Z
J. Braz. Chem. Soc.. Publicado em: 2016-12
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3. Cytotoxicity and Leishmanicidal Activity of Isoniazid-Derived Hydrazones and 2-Pyrazineformamide Thiosemicarbazones
The isoniazid-derived hydrazones 2-pyridinecarbaldehyde- (HPCIH), 2-acetylpyridine- (HAPIH), 2-benzoylpyridine- (HBPIH), 2-pyridineformamide- (HPAmIH) and 2-pyrazineformamide- (HPzAmIH) isonicotinoyl hydrazones, as well as the pyrazinamide-derived thiosemicarbazones 2-pyrazineformamide- (HPzAm4DH), N(4)-methyl-2-pyrazineformamide- (HPzAm4M), N(4)-ethyl-2-pyr
J. Braz. Chem. Soc.. Publicado em: 2016-04
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4. Efficient Eco-Friendly Solvent-Free Click Synthesis and Antimicrobial Evaluation of New Fluorinated 1,2,3-Triazoles and their Conversion into Schiff Bases
A facile and convenient green click synthesis has been developed for the preparation of new fluorinated 1,2,3-triazoles under solvent-free conditions via a Huisgen 1,3-dipolar cycloaddition reaction between dimethylacetylene dicarboxylate (DMADC) and fluorophenyl azides in excellent yields within 2 min. Treatment of the resulting diesters with hydrazine hydr
J. Braz. Chem. Soc.. Publicado em: 2015-10
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5. HIDAZIDA 6-HIDRAZINONICOTÍNICA: SÍNTESE QUIMIO E REGIOSSELETIVA DE PIRIDINOHIDRAZONAS, ÁCIDOS PIRAZOLIL-NICOTÍNICOS E HETEROCICLOS DERIVADOS / 6-HYDRAZINONICOTINIC ACID HYDRAZIDE: CHEMO AND REGIOSELECTIVE SYNTHESIS OF PYRIDINE-HYDRAZONES, PYRAZOLYL-NICOTINIC ACIDS AND HETEROCYCLIC DERIVATIVES
Este trabalho descreve, inicialmente, o estudo de métodos de hidrólise para a ligação amídica [C(O)-N] em 2-[3-alquil(aril/heteroaril)-5-hidróxi-5-trifluormetil-4,5-diidro-1H-pirazol-1-il]-5-[3-alquil(aril/heteroaril)-5-hidróxi-5-trifluormetil-4,5-diidro-1H-carbonilpirazol-1-il]piridinas (2), sendo alquila = CH3, arila = C6H5, 4-OCH3C6H4, 4,4-BiPh e h
IBICT - Instituto Brasileiro de Informação em Ciência e Tecnologia. Publicado em: 20/04/2012
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6. Complexos metálicos de hidrazonas, tiossemicarbazonas e lapachol: atividade farmacológica e avaliação de relações estrutura-atividade
The present work comprises the synthesis and characterization of metal compounds with bioactive ligands and the study of their pharmacological profile. Anti-inflammatory, antimicrobial, antiparasitic and antitumor drug candidates were designed. Complex [Zn(LASSBio-466)H2O]2 was synthesized with salicylaldehyde-2-chlorobenzoyl hydrazone (H2LASSBio-466), while
IBICT - Instituto Brasileiro de Informação em Ciência e Tecnologia. Publicado em: 10/02/2012
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7. Síntese, Caracterização Estrutural e Propriedades Luminescentes de Complexos de Lantanídeos (III) com Hidrazonas e Semicarbazonas derivadas da 2,6-Diformilpiridina e com Triazenos 1-óxidos. / Synthesis, Structural Characterization and Luminescent Properties of Complexes of Lanthanides (III) with Hydrazones and Semicarbazones derived from 2,6-diformylpyridine and Triazenes 1-oxides.
Lanthanide complexes with ligands containing oxygen and nitrogen as donor atoms have been investigated in this study aiming to explore the coordinative behavior of metals with high coordination numbers, as well as a study of luminescence properties of new complexes. The chosen ligands were hydrazones and semicarbazones derived from 2,6-diformylpyridine and t
IBICT - Instituto Brasileiro de Informação em Ciência e Tecnologia. Publicado em: 201103
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8. Síntese e avaliação preliminar da atividade antinociceptiva de novas isoxazolil-aril-hidrazonas
New 2-isoxazoline aldehydes were synthesized, in good yields, from cycloadduct of the 1,3-dipolar cycloaddition reaction between endocyclic enecarbamate and carboethoxyformonitrile oxide (CEFNO). Condensation of these 2-isoxazoline aldehydes with several phenyl-hydrazines produced new isoxazolyl-aryl-hydrazones, which showed low toxicity and excellent antino
Química Nova. Publicado em: 2011
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9. Organotin(IV) complexes with 2-acetylpyridine benzoyl hydrazones: antimicrobial activity
Reações de tricloreto de n-butilestanho, [Bu nSnCl3], e tricloreto de fenilestanho, [PhSnCl3], com 2-acetilpiridina benzoil hidrazona (H2AcPh), 2-acetilpiridina-para-cloro-benzoil hidrazona (H2AcpClPh) e 2-acetilpiridina-para-nitro benzoil hidrazona (H2AcpNO2Ph) produziram os complexos [Bu nSn(2AcPh)Cl2] (1), [Bu nSn(2AcpClPh)Cl2] (2), [Bu nSn(2AcpNO2Ph)Cl
Journal of the Brazilian Chemical Society. Publicado em: 2010
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10. Síntese, caracterização e estudos biológicos de novas dialquilfosforilidrazonas derivadas de cetonas. / New Dialkylphosphorylydrazones: Synthesis, Characterization and Evaluation of Biological Activity. Seropédica, UFRRJ, 2007.
A series of twelve novel organophosphorus compounds, derived from dialkylphosphorylydrazone ketones were synthesized in three steps of reaction: the first step is the synthesis of various dialkyl phosphonates which are obtained by reaction of phosphorus trichloride (PCl3) with three Mols the corresponding alcohois. In the second step, the reaction of the dia
Publicado em: 2009
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11. HETEROCICLIZAÇÃO ENTRE 4-ALCÓXI-1,1,1-TRIFLÚOR-3-ALQUEN-2-ONAS E HIDRAZONAS: METODOLOGIAS SELETIVAS PARA A OBTENÇÃO DE HETEROCICLOS TRIFLUORMETILADOS / HETEROCYCLIZATION OF 4-ALKOXY-1,1,1-TRIFLUORO-3-ALKEN-2-ONES WITH HYDRAZONES: SELECTIVE METHODS FOR THE SYNTHESIS OF TRIFLUOROMETHYLATED HETEROCYCLES
Esta tese descreve diversas metodologias para a síntese regiosseletiva de heterociclos trifluormetilados a partir de 4-alcóxi-1,1,1-triflúor-3-alquen-2-onas e hidrazonas. Na primeira parte do trabalho, uma série de (E)-2-[N-benzil(1-feniletil) idenohidrazino]-4-trifluormetilpirimidinas inéditas foi obtida de maneira convergente a partir da ciclocondensa
Publicado em: 2009
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12. SÃntese assimÃtrica de 3-carboxamidas enantiomericamente puras e de hidrazidas e arilhidrazonas, derivadas do novo heterociclo 7-(benzoil)- 2-isoxazolina[5,4-b] pirrolidina. AvaliaÃÃo das atividades biolÃgicas
In our previous studies, aza-bicyclic 2-isoxazolines were obtained, such as, 2- isoxazoline[5,4-b] piperidine and 2-isoxazoline[5,4-b] pyrrolidine. N-(benzoyl)-amides and, derived from these heterocycles, showed promising biological activity, (anti-inflammatory and toxicity). Compounds containing hydrazide and hydrazone functionalities are described in the l
Publicado em: 2008