Synthetic Analogues
Mostrando 1-12 de 123 artigos, teses e dissertações.
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1. The Research on Porphyrins and Analogues in Brazil: A Small Review Covering Catalytic and other Applications since the Beginning at Universidade de São Paulo in Ribeirão Preto until the Joint Venture between Brazilian Researchers and Colleagues from Universidade de Aveiro, Portugal
The synthetic versatility and the potential applications of porphyrins and analogues in different fields have aroused special interest in their study, especially to mimic biological systems, such as cytochrome P-450. The ability of the porphyrin tetrapyrrolic core to accommodate metal ions of varying charges can modulate the type of application of these comp
J. Braz. Chem. Soc.. Publicado em: 24/10/2019
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2. Linear Peptide Analogues from Jatropha’s Orbitides Promote Migration of Human Neonatal Foreskin Fibroblasts in vitro and Collagen Deposition
Orbitides are a class of small naturally occurring cyclic peptides with structural and functional diversities. Their chemical properties make this class feasible to be obtained by solid phase peptide synthesis (SPPS). Therefore, this synthetic accessibility enables useful application and facilitates the identification of analogues, bioactivity studies, and t
J. Braz. Chem. Soc.. Publicado em: 21/10/2019
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3. Oxone®-Mediated Direct α-Hydroxylation of β-Dicarbonyl Compounds: Racemic Synthesis of Harzialactone A
An environmentally benign method is described for the α-hydroxylation of malonates and cyclic analogues in aqueous medium at room temperature under mild conditions, based on the in situ generation of dimethyldioxirane through the combination of acetone and Oxone®. This procedure was found to be substrate-dependent and was successfully performed to provide
J. Braz. Chem. Soc.. Publicado em: 12/08/2019
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4. 2D, 3D and Hybrid QSAR Studies of Nostoclide Analogues as Inhibitors of the Photosystem II
Synthetic herbicides are widely used for weed control in crops. Continuous application of chemicals induces the adaptation of weeds, leading to the development of resistance. Therefore, research for novel synthetic herbicides plays an important role in crop protection and food production. Within this context, it is important to understand the relationship be
J. Braz. Chem. Soc.. Publicado em: 2019-02
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5. Synthesis and in vitro anti-HIV-1 evaluation of some N-arylsulfonyl-3-formylindoles
As our ongoing work on research of anti-HIV-1 inhibitors, fifteen N-arylsulfonyl-3-formylindoles (3a-o) were designed and prepared through two step synthetic route. Firstly, 3-formylindoles (2a-c) were synthesized via the Vilsmeier-Haack reaction. Subsequently, treatment of 2a-c with the appropriate arylsulfonyl chlorides led to the corresponding target comp
Braz. J. Pharm. Sci.. Publicado em: 29/11/2018
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6. Synthesis, Characterization and in vitro Anticancer Activity of Novel 8,4’-Oxyneolignan Analogues
Neolignans are a class of natural products with a wide range of biological effects. These substances are of great synthetic and biological interest, especially in searching for novel anticancer agents. In this paper, we report the synthesis of a new subclass of 8,4’-oxyneolignan analogues (β-ketoethers and β-ketoesters) and their cell viability assay on
J. Braz. Chem. Soc.. Publicado em: 2017-11
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7. LNO3 AND L3 Are Associated With Antiproliferative And Pro-Apoptotic Action In Hepatoma Cells
Abstract The identification of antitumoral substances is the focus of intense biomedical research. Two structural analogues of thalidomide, LNO3 and L3, are two synthetic compounds that might possess such antitumor properties. We evaluated the toxicological effects of these substances, including cytotoxicity, genotoxicity and induction of apoptosis in HTC ce
Genet. Mol. Biol.. Publicado em: 2016-06
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8. SYNTHESIS AND ANTIFUNGAL ACTIVITY OF PALMITIC ACID-BASED NEOGLYCOLIPIDS RELATED TO PAPULACANDIN D
A series of six new palmitic acid-based neoglycolipids related to Papulacandin D were synthesized in five steps, resulting in good yields, and they were evaluated against Candida spp. All twelve synthetic intermediates were also evaluated. The synthesis involved the initial glycosylation of two phenols (4-hydroxy-3-methoxybenzaldehyde and 3-hydroxybenzaldehy
Quím. Nova. Publicado em: 2015-12
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9. Synthesis of 8.O.4 neolignans, derivatives and active analogues in Leishmania / Sintese de neolignanas 8.O.4 , derivados e analogos ativos em Leishmania
Neolignans and lignans present significant biological and pharmacological activities. Chemically lignans are dimers derived from the oxidative coupling of cinnamic and/or cinnamyl alcohol, while neolignans derive from allyl and/or propenyl phenols. In this work, the synthesis of neolignans and correlated substances resulted from the condensation reactions be
Publicado em: 2009
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10. Identification of bradykinin: related peptides from Phyllomedusa nordestina skin secretion using electrospray ionization tandem mass spectrometry after a single-step liquid chromatography
Amphibian skin secretions are a source of potential new drugs with medical and biotechnological applications. Rich in peptides produced by holocrine-type serous glands in the integument, these secretions play different roles, either in the regulation of physiological skin functions or in the defense against predators or microorganisms. The aim of the present
Journal of Venomous Animals and Toxins including Tropical Diseases. Publicado em: 2009
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11. Evaluation of biological potential of natural piperolídeos of Piper malacophyllum (C. Presl) C. DC. and synthetic analogues / Avaliação do pontencial biológico de piperolídeos naturais de Piper malacophyllum (C. Presl) C. DC. e de análogos sintéticos
Based on the powerful antifungal activity of piperolides (1 e 2) isolated from Piper malacophyllum leaves extracts, several analogues were synthesized aiming at establishing preliminary structure-activity relationship against Cladosporium cladosporioides, C. sphaerospermum and against epimastigote form of Trypanosoma cruzi. Phytochemical studies carried out
Publicado em: 2008
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12. Heck arylation reaction with arenediazonium salts : applications in the total synthesis of polyhydroxylated prolines and pyrrolidines, rolipram and baclofen analogues, and in the formal synthesis of prepolycitrin A and polycitrin A / Reação de arilação de Heck com sais de arenodiazonio : aplicações nas sinteses totais de prolinas e pirrolidinas poliidroxiladas, rolipram e analogos do baclofeno, e na sintese formal de prepolicitrina A e policitrina A
The Heck-Matsuda arylation reaction is a valuable and extremely versatile synthetic procedure for carbon-carbon bond formation, based on the coupling of an olefin with an arenediazonium salt in the presence of a zerovalent palladium organometallic specie. Recently, the use of this reaction has been gaining space in total syntheses, demonstrating its viabilit
Publicado em: 2008