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Relevant bibliographies by topics / Piperazina

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Journal articles

Academic literature on the topic 'Piperazina'

Author: Grafiati

Published: 4 June 2021

Last updated: 1 February 2022

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Journal articles on the topic "Piperazina"

1

DEMUNER, Antônio Jacinto, Mauro LONGUE FILHO, Luiz Cláudio de Almeida BARBOSA, and Maria Amélia dos SANTOS. "Sintese e avaliação da atividade nematicida de derivados da piperazina." Eclética Química 26 (2001): 11–24. http://dx.doi.org/10.1590/s0100-46702001000100001.

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Na busca de novos nematicidas sintéticos, oito derivados da piperazina foram preparados. Esses compostos, e também dois derivados da piperazina e a piperazina, disponíveis comercialmente, foram submetidos a ensaios biológicos para avaliar a atividade dos mesmos sobre os fitonematóides Meloidogyne incognita e Heterodera glycines. Na concentração de 20 mig mL-1, os compostos causaram de 3 a 73% de mortalidade em M. incognita e de 7 a 58% de mortalidade em H. glycines.

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2

Kmoníček, Vojtěch, Martin Valchář, and Zdeněk Polívka. "Some 4-Substituted 1-(3-Pyridylmethyl)piperazines with Antihistamine Activity." Collection of Czechoslovak Chemical Communications 59, no. 10 (1994): 2343–50. http://dx.doi.org/10.1135/cccc19942343.

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Several compounds derived from nicotinic acid were prepared within a more extensive programme aiming at the synthesis of new substances with expected antihistamine and antidepressant activity. Some of these compounds display certain structural resemblance with the antidepressant agent piberaline (EGYT 475, Trelibet®, I) and its analogues. The products were used as intermediates for the synthesis of further compounds and most of them were subjected to pharmacological testing. Substituted nicotinic acid piperazides IIa - IId and IVa - IVe were obtained by reactions of nicotinoyl chloride (prepar

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3

Gettys, Kristen, Zhishi Ye, and Mingji Dai. "Recent Advances in Piperazine Synthesis." Synthesis 49, no. 12 (2017): 2589–604. http://dx.doi.org/10.1055/s-0036-1589491.

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Piperazine ranks as the third most common N-heterocycle appearing in small-molecule pharmaceuticals. This review highlights recent advances in methods development for the construction of the piperazine ring system with particular emphasis on preparing carbon-substituted piperazines.1 Introduction2 Reduction of (Di)ketopiperazine3 N-Alkylation4 Transition-Metal-Catalyzed/Mediated Piperazine Synthesis4.1 The SnAP and SLAP Methods4.2 Palladium-Catalyzed Cyclization4.3 Gold-Catalyzed Cyclization4.4 Other Metal-Catalyzed/Mediated Cyclization4.5 Borrowing Hydrogen Strategy4.6 Imine Reductive Cycliz

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4

Chagas, N. A., and M. Mascarenhas. "Efeitos Neurobiológicos do Uso de 1-(3-clorofenil) Piperazina." Ciência em Movimento - Biociências e Saúde 15, no. 30 (2013): 27–34. http://dx.doi.org/10.15602/1983-9480/cmbs.v15n30p27-34.

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5

Yadav, Pradeep, and Y. C. Joshi. "Synthesis and Spectral Study of Novel Norfloxacin Derivatives." E-Journal of Chemistry 5, s2 (2008): 1154–58. http://dx.doi.org/10.1155/2008/357073.

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Reaction of [1-ethyl-6-fluoro-1,4-dihydro-4-oxo-7-(1-piperazinyl)-quinolone-3-carboxylic acid (norfloxacin) with thiazole / benzothiazole diazonium chloride to get new piperazine substituted norfloxacin derivative. These norfloxacin derivatives were further condensed with variousβ-diketone to get novel acid derivatives of 1-Ethyl-6-fluoro-4-oxo-7- [4 (thiazol-2-yldiazenyl)-piperzin-1-yl]-1,4-dihydro-quinoline-3-carboxylic acid (6a-e) and 7-(4-(benzo[d]thiazol-2-yldiazenyl)piperazin-1-yl)-1-ethyl-6-fluoro-4-oxo-1, 4-dihydroquinoline-3-carboxylic acid (6 f-j). Structures of these compounds were

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6

Kafka, Stanislav, Jan Čermák, Tomáš Novák, František Pudil, Ivan Víden, and Miloslav Ferles. "Syntheses of piperazines substituted on the nitrogen atoms with allyl, propyl, 2-hydroxypropyl and 3-hydroxypropyl groups." Collection of Czechoslovak Chemical Communications 50, no. 5 (1985): 1201–11. http://dx.doi.org/10.1135/cccc19851201.

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The paper describes synthesis of 1,4-diallylpiperazine (I), 1-allylpiperazine (III), 1-propylpiperazine (IV), 1-(1-piperazinyl)-2-propanol (V), 3-(1-piperazinyl)-1-propanol (VI), 1-allyl-4-propylpiperazine (VII), 1-(4-allyl-1-piperazinyl)-2-propanol (VIII), 3-(4-allyl-1-piperazinyl)-1-propanol (IX), 1,4-dipropylpiperazine (X), 1-(4-propyl-1-piperazinyl)-2-propanol (XI), 3-(4-propyl-1-piperazinyl)-1-propanol (XII), 1,4-bis(2-hydroxypropyl)piperazine (XIII), 3-[4-(2-hydroxypropyl)-1-piperazinyl]-1-propanol (XIV) and 1,4-bis(3-hydroxypropyl)piperazine (XV). Retention indices of I-XV reported and

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7

Jílek, Jiří, Martin Valchář, Jiří Holubek, et al. "Noncataleptic neuroleptic agents: 2-(4-(2-(2-Chloro-10,11-dihydrodibenzo[b,f]thiepin-10-yloxy)ethyl)piperazine-1-yl)ethanol and some related compounds." Collection of Czechoslovak Chemical Communications 53, no. 11 (1988): 2731–41. http://dx.doi.org/10.1135/cccc19882731.

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10-(2-Bromoethoxy)-2-chloro-10,11-dihydrodibenzo[b,f]thiepin (X), prepared by two methods, was subjected to substitution reactions with 2-(1-piperazinyl)ethanol, 3-(1-piperazinyl)propanol, 1-methylpiperazine, 3-(1-piperazinyl)propionamide, piperazine, and 1-(ethoxycarbonyl)piperazine and gave the title compounds II-VII. The alcohol II was esterified by treatment with acid chlorides to compounds VIII and IX. Compounds II, V, and VIII proved to be noncataleptic neuroleptic agents and II (clopithepin, VÚFB-17 076) was selected for preclinical studies.

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8

Little, Vanessa Renee, and Keith Vaughan. "Synthesis and characterization of several series of 4-acyl-1-[2-aryl-1-diazenyl]piperazines." Canadian Journal of Chemistry 92, no. 9 (2014): 838–48. http://dx.doi.org/10.1139/cjc-2014-0242.

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Five series of a novel class of 4-acyl-1-[2-aryl-1-diazenyl]piperazines have been synthesized and characterized: the 4-acetyl-1-[2-aryl-1-diazenyl]piperazines [series 1]; the 4-cyclohexylcarbonyl-1-[2-aryl-1-diazenyl]piperazines [series 2]; the 4-benzoyl-1-[2-aryl-1-diazenyl]piperazines [series 3]; the benzyl 4-[2-aryl-1-diazenyl]-1-piperazinecarboxylates [series 4]; and the t-butyl 4-[2-aryl-1-diazenyl]-1-piperazinecarboxylates [series 5]. The compounds were synthesized by diazotization of a primary aromatic amine and subsequent coupling to an appropriate secondary amine: 1-acetylpiperazine [

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9

Schmitz, Ana Paula, Olyr Celestino Kreutz, and Edna Sayuri Suyenaga. "ANTIPSICÓTICOS ATÍPICOS VERSUS EFEITO OBESOGÊNICO SOB A ÓPTICA DA QUÍMICA MEDICINAL." Revista Eletrônica de Farmácia 12, no. 3 (2015): 23. http://dx.doi.org/10.5216/ref.v12i3.33714.

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Os fármacos antipsicóticos são os principais agentes utilizados no tratamento da esquizofrenia e atuam principalmente como antagonistas do receptor dopaminérgico D2. Entre eles, destacam-se os antipsicóticos atípicos, os quais apresentam um perfil farmacológico peculiar por induzirem menos efeitos extrapiramidais. Geralmente são indicados aos pacientes com sintomas negativos da esquizofrenia, ou em casos refratários ao tratamento com medicamentos de primeira geração, porém são relatados . Desta forma, foi realizada uma revisão bibliográfica sobre estes fármacos correlacionando a estrutura quím

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10

Song, Yanxi, C. S. Chidan Kumar, G. B. Nethravathi, S. Naveen, and Hongqi Li. "Cinnarizinium picrate." Acta Crystallographica Section E Structure Reports Online 68, no. 6 (2012): o1747. http://dx.doi.org/10.1107/s1600536812020764.

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In the title salt {systematic name: 4-diphenylmethyl-1-[(E)-3-phenylprop-2-en-1-yl]piperazin-1-ium 2,4,6-trinitrophenolate), C26H29N2 +·C6H2N3O7 −, the cinnarizinium cation is protonated at the piperazine N atom connected to the styrenylmethyl group; the piperazine ring adopts a distorted chair conformaiton. In the crystal, bifurcated N—H...(O,O) hydrogen bonds link the components into two-ion aggregates.

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