Results 51 to 60 of about 108,024 (198)
Beilstein Journal of Organic Chemistry, 2014 Three new porphyrin aminoalkyl dibenzylphosphoramidates were synthesized by nucleophilic aromatic substitution of one p-fluorine atom of 5,10,15,20-tetrakis(pentafluorophenyl)porphyrin (TPPF20) by primary aminoalkyl dibenzylphosphoramidates.
Marcos C. de Souza +5 more
doaj +1 more source
Análise da usabilidade de um laboratório virtual de química orgânica [PDF]
, 2007 Neste trabalho apresentamos uma análise da usabilidade de um laboratório virtual de química orgânica na qual pretendemos avaliar questões relativas a eficiência, eficácia e satisfação dos utilizadores.
Bottentuit Junior, João Batista +1 more
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Sistema orgânico de produção de pescado de água doce. [PDF]
, 2012 No presente trabalho objetivou-se levantar dados sobre a produção orgânica de pescado de água doce. Atualmente, a produção de alimentos orgânicos de origem vegetal é a predominante no mercado, no entanto, a criação de animais com certificação de origem ...
Boscolo, Wilson Rogério +3 more
core +2 more sources
Chemistry – A European Journal, EarlyView.A self‐assembled hydrophobic and red phosphorescent Au(I) coordination polymer (CP) was synthesized under mild conditions. Single‐crystal X‐ray diffraction (XRD) demonstrated linear Au(I) chains stabilized by aurophilic and hydrogen bonding interactions.
Miguel Justo‐Tirado +4 more
wiley +1 more source
Superação do vitalismo e o imparável desenvolvimento da síntese orgânica [PDF]
, 2011 A síntese orgânica representou um marco capital no História do Química, conduzindo ao fim da filosofia vitalista que considerava que as substâncias constitutivas dos animais e das plantas eram de natureza diferente dos corpos minerais, não obedecendo as ...
Paixão, Fátima, Pereira, Mariette
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Alkene Hydrogenation by a Cationic, Nine‐Coordinate Molybdenum(VI) Pentahydride Catalyst
Chemistry – A European Journal, EarlyView.While late 3d metals dominate efforts to replace precious metals in homogeneous hydrogenation, molybdenum has remained largely ignored. This work reveals that a nine‐coordinate pentahydrido molybdenum complex can hydrogenate a broad range of alkenes efficiently, demonstrating that early‐metal polyhydrides can serve as genuine catalysts rather than mere
Arno Estival +9 more
wiley +1 more source
Menadione: a platform and a target to valuable compounds synthesis
Beilstein Journal of Organic Chemistry, 2022 Naphthoquinones are important natural or synthetic compounds belonging to the general class of quinones. Many compounds in this class have become drugs that are on the pharmaceutical market for the treatment of various diseases.
Acácio S. de Souza +8 more
doaj +1 more source
Relato de experiência Pibid: a contextualização do ensino de química na prevenção do uso de drogas lícitas e ilícitas [PDF]
, 2014 Anais do II Seminário Seminário Estadual PIBID do Paraná: tecendo saberes / organizado por Dulcyene Maria Ribeiro e Catarina Costa Fernandes — Foz do Iguaçu: Unioeste; Unila, 2014O presente artigo é um relato de experiência didática do subprojeto de ...
Franceschini, Tiago +1 more
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The Canadian Journal of Chemical Engineering, EarlyView.Abstract The synthesis and characterization of an amphiphilic nitroxide to be used as a controlling agent in a nitroxide‐mediated living radical polymerization in aqueous dispersion media is presented. In the first stage of nitroxide synthesis (phthalimide protection), two reaction methods were employed: traditional and microwave.
Enrique García‐Leal +3 more
wiley +1 more source
Synthesis of (macro)heterocycles by consecutive/repetitive isocyanide-based multicomponent reactions
Beilstein Journal of Organic Chemistry, 2019 Isocyanide-based multicomponent reactions are a versatile tool in the synthesis of heterocycles. This review describes recently developed approaches based on the combination of consecutive or repetitive isocyanide-based multicomponent reactions for the ...
Angélica de Fátima S. Barreto +1 more
doaj +1 more source