Organo-niobate Ionic Liquids: Synthesis, Characterization and Application as Acid Catalyst in Pechmann Reactions

The combinations of 1-butyl-3-methylimidazolium chloride with NbCl(5) yielded ionic mixtures with different melting point temperatures and acidity depending on the niobium molar fraction. The mixtures were characterized by thermal (DSC) and spectroscopic (FT-IR and (1)H NMR) analysis. The Pechmann r...

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Autores principales: Soares, Valerio C. D., Alves, Melquizedeque B., Souza, Ernesto R., Pinto, Ivana O., Rubim, Joel C., Andrade, Carlos Kleber Z., Suarez, Paulo A. Z.
Formato: Online Artículo Texto
Lenguaje:English
Publicado: Molecular Diversity Preservation International (MDPI) 2007
Materias:
Full Research Paper
Acceso en línea:https://www.ncbi.nlm.nih.gov/pmc/articles/PMC3692303/
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author Soares, Valerio C. D.
Alves, Melquizedeque B.
Souza, Ernesto R.
Pinto, Ivana O.
Rubim, Joel C.
Andrade, Carlos Kleber Z.
Suarez, Paulo A. Z.
author_facet Soares, Valerio C. D.
Alves, Melquizedeque B.
Souza, Ernesto R.
Pinto, Ivana O.
Rubim, Joel C.
Andrade, Carlos Kleber Z.
Suarez, Paulo A. Z.
author_sort Soares, Valerio C. D.
collection PubMed
description The combinations of 1-butyl-3-methylimidazolium chloride with NbCl(5) yielded ionic mixtures with different melting point temperatures and acidity depending on the niobium molar fraction. The mixtures were characterized by thermal (DSC) and spectroscopic (FT-IR and (1)H NMR) analysis. The Pechmann reactions of different phenols with ethylacetoacetate, producing coumarins, was used as model to evaluate the catalytic behavior of these mixtures as acid Lewis catalyst. These reactions were carried out using acidic mixtures of 60 mol%.
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spelling pubmed-36923032013-06-26 Organo-niobate Ionic Liquids: Synthesis, Characterization and Application as Acid Catalyst in Pechmann Reactions Soares, Valerio C. D. Alves, Melquizedeque B. Souza, Ernesto R. Pinto, Ivana O. Rubim, Joel C. Andrade, Carlos Kleber Z. Suarez, Paulo A. Z. Int J Mol Sci Full Research Paper The combinations of 1-butyl-3-methylimidazolium chloride with NbCl(5) yielded ionic mixtures with different melting point temperatures and acidity depending on the niobium molar fraction. The mixtures were characterized by thermal (DSC) and spectroscopic (FT-IR and (1)H NMR) analysis. The Pechmann reactions of different phenols with ethylacetoacetate, producing coumarins, was used as model to evaluate the catalytic behavior of these mixtures as acid Lewis catalyst. These reactions were carried out using acidic mixtures of 60 mol%. Molecular Diversity Preservation International (MDPI) 2007-05-11 /pmc/articles/PMC3692303/ Text en © 2007 by MDPI Reproduction is permitted for noncommercial purposes.
spellingShingle Full Research Paper
Soares, Valerio C. D.
Alves, Melquizedeque B.
Souza, Ernesto R.
Pinto, Ivana O.
Rubim, Joel C.
Andrade, Carlos Kleber Z.
Suarez, Paulo A. Z.
Organo-niobate Ionic Liquids: Synthesis, Characterization and Application as Acid Catalyst in Pechmann Reactions
title Organo-niobate Ionic Liquids: Synthesis, Characterization and Application as Acid Catalyst in Pechmann Reactions
title_full Organo-niobate Ionic Liquids: Synthesis, Characterization and Application as Acid Catalyst in Pechmann Reactions
title_fullStr Organo-niobate Ionic Liquids: Synthesis, Characterization and Application as Acid Catalyst in Pechmann Reactions
title_full_unstemmed Organo-niobate Ionic Liquids: Synthesis, Characterization and Application as Acid Catalyst in Pechmann Reactions
title_short Organo-niobate Ionic Liquids: Synthesis, Characterization and Application as Acid Catalyst in Pechmann Reactions
title_sort organo-niobate ionic liquids: synthesis, characterization and application as acid catalyst in pechmann reactions
topic Full Research Paper
url https://www.ncbi.nlm.nih.gov/pmc/articles/PMC3692303/
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