Biginelli Reaction
Mostrando 1-6 de 6 artigos, teses e dissertações.
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1. Synthesis and molecular modelling studies of pyrimidinones and pyrrolo[3,4-d]-pyrimidinodiones as new antiplasmodial compounds
BACKGROUND Malaria is responsible for 429,000 deaths per year worldwide, and more than 200 million cases were reported in 2015. Increasing parasite resistance has imposed restrictions to the currently available antimalarial drugs. Thus, the search for new, effective and safe antimalarial drugs is crucial. Heterocyclic compounds, such as dihydropyrimidinone
Mem. Inst. Oswaldo Cruz. Publicado em: 18/06/2018
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2. APPLICATION OF SULFONIC ACID FUNCTIONALIZED NANOPOROUS SILICA (SBA-Pr-SO3H) FOR THE PREPARATION OF 4,6-DIARYLPYRIMIDIN-2(1H)-ONES
In this work, we report the Biginelli-type reaction between various aldehydes, acetophenones and urea systems in the presence of sulfonic acid functionalized silica (SBA-Pr-SO3H) under solvent-free conditions, which led to 4,6-diarylpyrimidin-2(1H)-ones derivatives. SBA-Pr-SO3H with a pore size of 6 nm was found to be an efficient heterogeneous solid acid ca
Quím. Nova. Publicado em: 2015-05
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3. Catalyzed and non-catalyzed synthesis of bioactive monastrol
The bioactive 3,4-dihydropyrimidin-2(1H)-thione derivative known as Monastrol was synthesized under catalyzed and non-catalyzed conditions through the Biginelli multicomponent reaction under solvent-free conditions. The use of two Lewis acids (FeCl3 and CuCl2) and two Brønsted acids (HCl and CF3COOH) as catalysts improved the reaction yields of the transfor
Quím. Nova. Publicado em: 2014
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4. Multicomponent Biginelli's synthesis of 3,4-dihydropyrimidin-2(1H)-ones promoted by SnCl2.2H2O
Neste trabalho é descrita a habilidade do SnCl2.2H2O como catalisador na reação de Biginelli tricomponente. Uma variedade de aldeídos aromáticos mono- e dissubstituidos foi utilizada na condensação com acetoacetato de etila e uréia ou tiouréia. A reação foi efetuada em etanol ou acetonitrila como solventes em meio neutro e os resultados representa
Publicado em: 2010
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5. Síntese em fase sólida convergente de derivados 5-amidos diidropirimidinonas
Dihydropirimidinones (DHPMs) are molecules whose synthesis is known since 1893, and lately has been receiving increased attention due to its diversity of pharmacological actions, such as: anti-tumor activity, antiviral, antiinflammatory, calcium channel blocker and antiparasitic. In our study, we performed the synthesis of DHPM, its hydrolysis by conventiona
Publicado em: 2010
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6. Síntese do monastrol e novos compostos de Biginelli promovida por In(OTf)3
In this paper, we describe a practical route for the synthesis of Biginelli compounds using In(OTf)3. To study the generality of this catalyst, several examples using aromatic aldehydes, 1,3-dicarbonyl compounds, urea, and thiourea were investigated. The present procedure provides an efficient modification of the classical Biginelli reaction, namely short re
Química Nova. Publicado em: 2005-12