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Academic literature on the topic 'Aminoquinoléines'
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Dissertations / Theses on the topic "Aminoquinoléines"
Veignie, Étienne. "Mode d'action antimalarique de la chloroquine : rôle des propriétés acido-basiques des amino-4-quinoléines dans leur mécanisme de concentration intraparasitaire." Lille 1, 1990. http://www.theses.fr/1990LIL10108.
Full textBiot, Christophe. "Molécules ferrocéniques antipaludiques : synthèse, caractérisation et activité." Lille 1, 1998. https://pepite-depot.univ-lille.fr/LIBRE/Th_Num/1998/50376-1998-462.pdf.
Full textRonco, Cyril. "Synthèse de ligands de l'acétylcholinestérase humaine : application à l'étude des réactions de click in situ." Rouen, 2010. http://www.theses.fr/2010ROUES017.
Full textIn situ click chemistry is a recent technique developed to accelerate high throughput screening of biologically active products. It consists in the use of two libraries of ligands possessing complementary reactive functions in the presence of the targeted biomolecule. The biomolecule might be able to assembly itself its own potent divalent ligand from the mixture of fragments. The proof of principle has already been established by using mouse and eel acetylcholinesterases (AChE) leading to very tight binding inhibitors of these enzymes. The goal of this project is to investigate this "in situ click chemistry" via its transposition to human AChE, whose inhibition has important medicinal interests like the palliative treatment of Alzheimer's disease. The work presented in this manuscript deals mainly with the synthesis of AChE ligands bearing a reactive function for the click chemistry. Huprine and tacrine-like 4-aminoquinoline ligands were particularly studied and tetrahydroisoquinoline, indole, tetrahydropyrido[3,4,b]indole and coumarine derivatives were also prepared. During the course of this work, an alternative pallado-catalyzed method to afford N-alkylated tacrines and huprines has been developed and a novel synthetic pathway for huprines functionalized at position 9 has been discovered and exploited to finally obtain more than 60 mono-or heterodimeric AChE inhibitors. The molecules synthesized present a double interest. For the application of the in situ click chemistry to the human AChE, they have been used as tools to obtain the first in situ hit with this enzyme, but also to clarify some questions about the method and to outline its limitations. Moreover, several ligands were used for emergent applications in various bio-organic chemistry fields like PET or fluorescent imaging, crystallographic studies or biomolecules purification
Dubar, Faustine. "Avancées dans la compréhension des mécanismes d'action d'agents anti-apicomplexes : de la conception à l'imagerie in vitro." Electronic Thesis or Diss., Lille 1, 2012. http://www.theses.fr/2012LIL10038.
Full textApicomplexa parasites are intracellular organisms involved in many human diseases. Among them the scourge of malaria continues to kill over 600,000 people each year. Despite all efforts of health authorities, the malaria parasite has developed resistance to all antimalarial drugs and alternatives to current treatments are eagerly awaited. The development of effective new drugs must go through a complete understanding of molecular mechanisms of action of current drug and knowledge of resistance mechanisms developed by the parasite. In this thesis, we were interested in understanding the mechanism of action of Ferroquine, a drug candidate in development by Sanofi. We studied the impact of its original structure and its physico-chemical properties on its antimalarial activity. On the other hand, imaging studies have investigated the accumulation and localization of this molecule. In the second part, we were interested in developing analogues of ciprofloxacin. Previous pharmacomodulation studies showed that the transformation of ciprofloxacin into a prodrug and the insertion of a ferrocene into its structure allow an increase in activity. This thesis has investigated the influence of ferrocene on the activity of these molecules. Imaging studies were also carried out on this family of compounds
Schneider, Jérémy. "Étude d'aminoarylalcools énantiomériquement purs à visée antipaludique." Thesis, Amiens, 2018. http://www.theses.fr/2018AMIE0044.
Full textMalaria is a disease induced by a protozoan parasite, Plasmodium. Among the five species of Plasmodium parasitizing humans, P. falciparum is the parasite which causes the most serious form of the disease. Since 2001, the World Health Organization (WHO) recommends artemisinin-based combination therapies (ACTs). However, the emergence of multi-resistant parasites decreases the effectiveness of these ACTs. Therefore, the development of new compounds active on Plasmodium resistant strains remains important. Previously, an asymmetric synthesis allowing access to 4-aminoalcohol-quinoline enantiomers (AQM), mefloquine analogs, was developed in the laboratory. Enantiomers (S) have been shown to be 2 to 15 -fold more active than their analogues (R). Derivatives were active on nanomolar range against Pf3D7 (chloroquine-sensitive) and PfW2 (chloroquine-resistant). In continuation of our work, we have synthesized and studied new chemical series, derived from AQMs, in order to: i) study the effect of amino substituents; ii) restore the susceptibility of mefloquine-resistant strains; or iii) study the effect of the nature of the heterocycle (fluorene vs quinoline) by synthesizing enantiopure lumefantrine analogs. The antimalarial activity, in vitro, was evaluated on Pf3D7 and PfW2 strains. Subsequently, the cytotoxicity and pharmacokinetic properties (ADME) in vitro of the most promising molecules were performed. These results will lead to the evaluation of the in vivo antimalarial activity of a first compound
Vausselin, Thibaut. "Caractérisation de l'activité antivirale de dérivés de 4-aminoquinolines sur le virus de l'hépatite C." Thesis, Lille 1, 2013. http://www.theses.fr/2013LIL10078/document.
Full textHepatitis C virus (HCV) is a major cause of chronic liver disease for which standard-of-care treatment consisted in a bi-therapy based on two non-specific inhibitors : pegylated interferon-α (IFN-α) and ribavirin. Since 2011 protease inhibitors (boceprevir and telaprevir) increased the response to treatment. However, they are specific of genotype 1. Furthermore, they cause severe side effects and their cost remains high, leading to the development of new compounds.Chloroquine, usually used against malaria, is able to inhibit HCV. But its clinical use is complicated by several side effects. That is why chloroquine derivatives have been developed and tested during this thesis. A first compound, the ferroquine (FQ) inhibit HCV infection at fusion step and also replication, albeit at higher concentrations. The effect of FQ on HCV entry was confirmed by the selection of a resistant mutant showing that a single mutation (S327A) can confer resistance to FQ. The use of pseudoparticles harboring E1E2 glycoproteins at their surface showed this inhibition is not genotype specific. An other derivative,which pharmacodynamics properties would allow some potential therapeutic use, has been tested, showing an inhibition of entry and replication steps. As FQ, this compound is able to inhibit cell-to-cell transmission of HCV and has, in combination with boceprevir or IFN-α, additive antiviral effects against HCV
Dubar, Faustine. "Avancées dans la compréhension des mécanismes d'action d'agents anti-apicomplexes : de la conception à l'imagerie in vitro." Thesis, Lille 1, 2012. http://www.theses.fr/2012LIL10038/document.
Full textApicomplexa parasites are intracellular organisms involved in many human diseases. Among them the scourge of malaria continues to kill over 600,000 people each year. Despite all efforts of health authorities, the malaria parasite has developed resistance to all antimalarial drugs and alternatives to current treatments are eagerly awaited. The development of effective new drugs must go through a complete understanding of molecular mechanisms of action of current drug and knowledge of resistance mechanisms developed by the parasite. In this thesis, we were interested in understanding the mechanism of action of Ferroquine, a drug candidate in development by Sanofi. We studied the impact of its original structure and its physico-chemical properties on its antimalarial activity. On the other hand, imaging studies have investigated the accumulation and localization of this molecule. In the second part, we were interested in developing analogues of ciprofloxacin. Previous pharmacomodulation studies showed that the transformation of ciprofloxacin into a prodrug and the insertion of a ferrocene into its structure allow an increase in activity. This thesis has investigated the influence of ferrocene on the activity of these molecules. Imaging studies were also carried out on this family of compounds
Aillerie, Alexandre. "Organocatalyse : réduction asymétrique par transfert d’hydrogène et synthèse de nouveaux catalyseurs." Thesis, Lille 1, 2014. http://www.theses.fr/2014LIL10185.
Full textThe control of chirality is crucial in the synthesis of chiral active biologically molecules. Numerous chiral tetrahydroquinolines have revealed outstanding biological activities, particularly in the treatment of cancer. One of the asymmetric reduction systems to access these compounds of medicinal interest combines an organic hydride source and a chiral Brønsted acid catalyst. This system is based on a biomimetic approach of NADH and NADPH cofactors involved in many redox metabolisms. Following this methodology in agreement with the sustainable development, various enantiopure nitrogen-based heterocycles have been prepared as potential anticancer drugs. The first enantioselective synthesis of 4-azapodophyllotoxine derivatives using this reduction process has been set up. An innovative methodology, based on the possibility to generate in situ the hydride source has also been developed. Moreover, news organocatalysts derived from phospholanic acid and ferrocene have also been synthesized and evaluated within chemical transformations
Chavain, Natascha. "Conception, synthèse, analyse structurale et activité antipaludique de dérivés de la ferroquine : investigation des mécanismes d'action." Thesis, Lille 1, 2008. http://www.theses.fr/2008LIL10050/document.
Full textBioorganometallic chemistry has shown to be an interesting alternative to face the problems of drug resistance in P. falciparum, the main causative agent of malaria. This research work is based on the design, synthe sis, structural characterisation and antimalarial activity ofnew ferroquine derivatives. Starting from the ferro quine skeleton, in order to make a pharmacomodulation, we have synthesized a large array of structurally various FQ derivatives. Structural characterisation of the se derivatives is described. The results of the biological studies on the inhibition of the parasite growth are very promising and structure-activity relationships have been brought out. Additional investigations using biochemical and biophysical methods have been done concerning the mechanism of action of these new compounds. This allows us to have a better understanding of the mechanism of action of ferroquine
Tran, Christine. "Développement de sondes activables à deux photons pour une utilisation en neurosciences." Thesis, Sorbonne Paris Cité, 2015. http://www.theses.fr/2015USPCB165.
Full textPhotosensitive molecular probes (‘caged’ compounds) derived from 2-hydroxymethylenedimethylaminoquinoline were prepared and tested for applications in neurophysiology. These compounds show high hydrolytic stability and low fluorescence, with fast fragmentation kinetics upon UV irradiation (365 nm), and under two photon photolysis conditions (730 nm). This platform was optimized by modifying the substitution pattern, increasing the conjugation length and incorporating C2 or S3 symmetry elements. Dipolar, quadrupolar (dimer) and octupolar (trimer) derivatives were thus synthesized and were found exhibiting high two-photon sensitivity ( < 2,50 GM). The most efficient probes were tested in neurophysiological experiments. While kaïnate derivatives are stable in aqueous solution at pH 7.4 in physiological conditions, L-glutamate and GABA derivatives required the use of a carbamate linker. Without irradiation, any major changes were observed on neuron excitability with “stock” solutions of these caged compounds (c = 200-300 µM), according to the lack of effects on neuron activity or action potentials evoked by depolarization. White light photolysis by short pulses generated sufficient active substances to induce large inward currents (up to 5 nA) in Purkinje neurons