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1.
Chembiochem ; 25(7): e202300844, 2024 Apr 02.
Artigo em Inglês | MEDLINE | ID: mdl-38337189

RESUMO

An organocatalytic [3+2] cycloaddition reaction between thiazolidine-containing ß-ketoester 1 and aryl azides 2 was employed to synthesize new 1,2,3-triazolyl-thiazolidine hybrids 3. In this metal-free approach, twelve compounds were isolated in yields ranging from 23 % to 96 % by using diethylamine (10 mol%) and DMSO at 75 °C for 24 hours. DNA-binding assays were conducted through absorption, emission spectroscopy and viscosimetry analysis, to evaluate the interaction capacity of the studied derivatives with nucleic acids. All the synthesized compounds were evaluated for their interactions with a specific group of compounds containing the pharmacophoric groups triazole and thiazolidine through a molecular docking speculative study, aimed at identifying the interaction profile of these compounds with DNA. The obtained results suggest that 1,2,3-triazolyl-thiazolidine hybrids could be a promising approach in the development of novel therapeutic agents targeting DNA-related processes.


Assuntos
Estrutura Molecular , Tiazolidinas/química , Simulação de Acoplamento Molecular , Reação de Cicloadição , Relação Estrutura-Atividade
2.
Chem Biodivers ; : e202301246, 2024 Oct 21.
Artigo em Inglês | MEDLINE | ID: mdl-39431922

RESUMO

The 7-chloro-4-(phenylselanyl)quinoline (4-PSQ) stands out for its potential antinociceptive and anti-inflammatory activities. Thus, in this study we investigated the structure-activity relationship of 4-PSQ and its analogues 7-chloro-4-[(4-fluorophenyl) selanyl]quinoline (a), 7-chloro-4-{[3-trifluoromethyl)phenyl] selanyl}quinoline (b), 4-((3,5-Bis(trifluoromethyl)phenyl)selanyl-7-chloroquinoline (c), 7-chloro-4-[(2,4,6-trimethyl)selanyl]quinolinic acid (d) and 7-chloroquinoline-4-selenium acid (e) in models of acute inflammation and chemical, thermal and mechanical nociception in mice, as well as by in silico methods. The compounds a (-F), b (-CF3), c (-Bis-CF3), d (-CH3), e (-OOH) and 4-PSQ exert antinociceptive effects in chemical and thermal nociception models, except compounds d (-CH3) and e (-OOH) that did not show antinociceptive effects in the hot plate test. In addition, treatments with all compounds did not cause locomotor changes in mice. In silico data  the compounds revealed that only compound c (Bis-CF3) exhibited low gastrointestinal absorption and that compounds c (Bis-CF3) and e (-OOH) do not have the ability to penetrate the blood-brain barrier, indicating that compound e (-OOH) did not produce a central antinociceptive effect. Furthermore, we found that this class of compounds has a higher affinity for COX-2 than for COX-1. In general, our data indicate that the insertion of substituents can alter the efficiency of 4-PSQ as an antinociceptive and anti-inflammatory agent.

3.
Org Biomol Chem ; 20(31): 6072-6177, 2022 08 10.
Artigo em Inglês | MEDLINE | ID: mdl-35904472

RESUMO

Transition metal catalysed direct sulfanylations of unreactive C-H bonds have become a unique and straightforward synthetic strategy in late-stage C-S bond formation of relevant complex molecules. Such transformations represent a breakthrough in modern synthetic organic chemistry, as they offer unusual reactivity patterns and avoid pre-functionalization of the starting materials. Despite inherent challenges in activating/functionalizing unreactive C-H bonds, a considerable number of different transition metals have shown the ability to selectively catalyze these processes toward C-S bond formation. In this sense, this review article covers the development and mechanistic analysis of the direct sulfanylation of Csp3-H and Csp2-H bonds through transition metal catalysed reactions in the last two decades, providing an essential guide for organic chemists working on this research area.


Assuntos
Elementos de Transição , Catálise , Elementos de Transição/química
4.
J Org Chem ; 86(24): 17866-17883, 2021 12 17.
Artigo em Inglês | MEDLINE | ID: mdl-34843245

RESUMO

A range of bis-triazolylchalcogenium-BTD 3 was synthesized by a copper-catalyzed azide-alkyne cycloaddition of azido arylchalcogenides 1 and 4,7-diethynylbenzo[c][1,2,5]thiadiazole 2. Eight new compounds were obtained in moderate to good yields using 1 mol % of copper(II) acetate monohydrate under mild reaction conditions. In addition, the synthesized bis-triazolylchalcogenium-BTD 3a-3h were investigated regarding their photophysical, electrochemical, and biomolecule binding properties in solution. In general, compounds presented strong absorption bands at the 250-450 nm region and cyan to green emission properties. The redox process attributed to the chalcogen atom was observed by electrochemical analysis (CV techniques). In addition, spectroscopic studies by UV-vis, steady-state emission fluorescence, and molecular docking calculations evidenced the ability of each derivative to establish interactions with calf-thymus DNA (CT-DNA) and bovine serum albumin (BSA). The behavior presented for this new class of compounds makes them a promising tool as optical sensors for biomolecules.


Assuntos
Soroalbumina Bovina , Tiadiazóis , DNA , Simulação de Acoplamento Molecular
5.
Molecules ; 26(8)2021 Apr 12.
Artigo em Inglês | MEDLINE | ID: mdl-33921473

RESUMO

In this work, we present a simple way to achieve 4-arylselanyl-1H-1,2,3-triazoles from selenium-containing carbinols in a one-pot strategy. The selenium-containing carbinols were used as starting materials to produce a range of selanyl-triazoles in moderate to good yields, including a quinoline and Zidovudine derivatives. One-pot protocols are crucial to the current concerns about waste production and solvent consumption, avoiding the isolation and purification steps of the reactive terminal selanylalkynes. We could also isolate an interesting and unprecedented by-product with one alkynylselenium moiety connected to the triazole.

6.
Psychopharmacology (Berl) ; 239(1): 59-81, 2022 Jan.
Artigo em Inglês | MEDLINE | ID: mdl-35013761

RESUMO

RATIONALE: Depression is often associated with memory impairment, a clinical feature of Alzheimer's disease (AD), but no effective treatment is available. 7-Chloro-4-(phenylselanyl) quinoline (4-PSQ) has been studied in experimental models of diseases that affect the central nervous system. OBJECTIVES: The pharmacological activity of 4-PSQ in depressive-like behavior associated with memory impairment induced by acute restraint stress (ARS) in male Swiss mice was evaluated. METHODS: ARS is an unavoidable stress model that was applied for a period of 240 min. Ten minutes after ARS, animals were intragastrically treated with canola oil (10 ml/kg) or 4-PSQ (10 mg/kg) or positive controls (paroxetine or donepezil) (10 mg/kg). Then, after 30 min, mice were submitted to behavioral tests. Corticosterone levels were evaluated in plasma and oxidative stress parameters; monoamine oxidase (MAO)-A and MAO -B isoform activity; mRNA expression levels of kappa nuclear factor B (NF-κB); interleukin (IL)-1ß, IL-18, and IL-33; phosphatidylinositol-se-kinase (PI3K); protein kinase B (AKT2), as well as acetylcholinesterase activity were evaluated in the prefrontal cortex and hippocampus. RESULTS: 4-PSQ attenuated the depressive-like behavior, self-care, and memory impairment caused by ARS. Based on the evidence, we believe that effects of 4-PSQ may be associated, at least in part, with the attenuation of HPA axis activation, attenuation of alterations in the monoaminergic system, modulation of oxidative stress, reestablishment of AChE activity, modulation of the PI3K/AKT2 pathway, and reduction of neuroinflammation. CONCLUSIONS: These results suggested that 4-PSQ exhibited an antidepressant-like effect and attenuated the memory impairment induced by ARS, and it is a promising molecule to treat these comorbidities.


Assuntos
Quinolinas , Selênio , Acetilcolinesterase/metabolismo , Animais , Depressão/tratamento farmacológico , Hipocampo/metabolismo , Sistema Hipotálamo-Hipofisário/metabolismo , Masculino , Camundongos , Doenças Neuroinflamatórias , Estresse Oxidativo , Sistema Hipófise-Suprarrenal/metabolismo , Quinolinas/farmacologia
7.
Life Sci ; 280: 119751, 2021 Sep 01.
Artigo em Inglês | MEDLINE | ID: mdl-34174321

RESUMO

AIMS: Obesity is associated with a spectrum of hepatic abnormalities that can be experimentally induced by injections of monosodium glutamate (MSG) in neonatal rodents. We investigated the protective actions of the repeated therapy with 4-phenylselenyl-7-chloroquinoline (4-PSQ), a quinoline derivative containing selenium, on damage to the liver triggered by early postnatal administration of MSG in male Wistar rats. MAIN METHODS: Neonatal rats received MSG (4 g/kg, subcutaneous route) or saline (1 ml/kg) from 5 to 14 postnatal day (PND) to induce obesity with consequent damages in the liver. 4-PSQ treatment (5 mg/kg) or canola oil (1 ml/kg) was administered from 60 to 76 PND by the intragastric route. On 76 PND, animals were anesthetized for blood and liver collection. Plasma markers of hepatic function, hepatic lipoperoxidation levels and histology analysis of liver tissue were assessed. KEY FINDINGS: Our data revealed that treatment with 4-PSQ reverted the increase in plasma transaminases activities observed in MSG rats. Treatment with 4-PSQ reduced plasma lactate levels in obese rats. In the liver, MSG elevated the content of lipoperoxidation which was reverted by 4-PSQ administrations. Lastly, 4-PSQ therapy attenuated the histological alterations induced by MSG. SIGNIFICANCE: Together, the results indicate a hepatoprotective action of repeated treatment with 4-PSQ in obese rats.


Assuntos
Doença Hepática Induzida por Substâncias e Drogas/tratamento farmacológico , Aromatizantes/efeitos adversos , Fígado/efeitos dos fármacos , Compostos Organosselênicos/uso terapêutico , Substâncias Protetoras/uso terapêutico , Quinolinas/uso terapêutico , Glutamato de Sódio/efeitos adversos , Animais , Animais Recém-Nascidos , Doença Hepática Induzida por Substâncias e Drogas/patologia , Fígado/patologia , Masculino , Ratos Wistar
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