Results 21 to 30 of about 12,051 (164)
Angewandte Chemie, EarlyView.π‐Extended COUPY dyes, obtained by vinylogation of coumarin‐based COUPY scaffolds, shift absorption, and emission deep into the NIR region while preserving compactness and synthetic accessibility. These bright, photostable dyes enable live‐cell imaging, FLIM, and site‐specific peptide conjugation, offering a modular platform for targeted bioimaging and
Diego Abad‐Montero +11 more
wiley +2 more sources
One-pot preparation of substituted pyrroles from α-diazocarbonyl compounds
Beilstein Journal of Organic Chemistry, 2008 In this work an efficient one-pot synthesis of substituted pyrroles 7a–n is described, which involves the in situ formation of dihydrofurans ethyl 5-butoxy-2-methyl-4,5-dihydrofuran-3-carboxylate (4), 1-(5-butoxy-2-methyl-4,5-dihydrofuran-3-yl)ethanone ...
Fernando de C. da Silva +5 more
doaj +1 more source
Eclética Química, 2018 The chemical indexes, suggested by Gottlieb et al., have not been used before regarding evolutionary tendency of species in the Swartzia genus. However, the importance of this work encour- aged for an analysis of the Swartzia genus using the metabolites ...
Aderbal F. Magalhães +3 more
doaj +1 more source
HPLC Quantification of Cytotoxic Compounds from Aspergillus niger
Journal of Chemistry, 2017 A high-performance liquid chromatography method was developed and validated for the quantification of the cytotoxic compounds produced by a marine strain of Aspergillus niger.
Paula Karina S. Uchoa +5 more
doaj +1 more source
Molecules, 2023 Organothiocyanates and selenocyanates are valuable compounds, both in terms of functional group interconversion and due to their biological activities. In this contribution, we report the synthesis of a series of these important substances in a mixture ...
Alix Y. Bastidas Ángel +2 more
doaj +1 more source
Synthetic model of a new deoxybenzoin derivative from Deguelia hatschbachii A.M.G. Azevedo
Eclética Química, 2018 In this paper we describe the synthesis of 2 ́,4 ́-dimethoxy-8-(propyl-2-one)-deoxybenzoin, a new compound employed as a model for the comparison with the respective spectral data for 6’,4- dihydroxy-3’-(3,3- dimethylallyl)-2",2"-dimethylchromene(5",6":5’
A. F. Magalhães +3 more
doaj +1 more source
Scientific Reports, 2022 Leishmaniasis is a neglected disease caused by protozoan parasites of the Leishmania genus. Benzylamines are a class of compounds selectively designed to inhibit the squalene synthase (SQS) that catalyzes the first committed reaction on the sterol ...
Sara Teixeira de Macedo-Silva +6 more
doaj +1 more source
Beilstein Journal of Organic Chemistry, 2017 Isocyanide-based multicomponent reactions (IMCRs) allow the construction of relatively complex molecules through a one-pot synthesis. The combination of IMCRs in a consecutive or sequential fashion further extends the complexity of the molecules obtained.
Angélica de Fátima S. Barreto +2 more
doaj +1 more source
Análise semiótica de representações moleculares na comunicação de conhecimentos sobre ácidos e bases em livros-texto de química orgânica: primeira e segunda tricotomia peirceana [PDF]
, 2014 Dissertação (mestrado) - Universidade Federal de Santa Catarina, Programa de Pós-Graduação em Educação Científica e Tecnológica, Florianópolis, 2014.Pesquisas recentes em educação científica têm revelado que a integração de diferentes tipos de linguagens
Gorri, Ana Paula
core
, 2015 Sebenta de apoio ao estudo da Unidade Curricular de Química Orgânica da Licenciatura em Biotecnologia e da Licenciatura em Engenharia Química da Escola Superior de Tecnologia do Barreiro do Instituto Politécnico de ...
Justino, Gonçalo, Justino, Marta
core +1 more source