Recent Applications of Heteropolyacids and Related Compounds in Heterocycle Synthesis. Contributions between 2010 and 2020
Over the past two decades, polyoxometalates (POM) have received considerable attention as solid catalysts, due to their unique physicochemical characteristics, since, first, they have very strong Bronsted acidity, approaching the region of a superacid, and second, they are efficient oxidizers that e...
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doaj-ddf25d94ed794d1296e204972946519c2021-02-24T00:00:51ZengMDPI AGCatalysts2073-43442021-02-011129129110.3390/catal11020291Recent Applications of Heteropolyacids and Related Compounds in Heterocycle Synthesis. Contributions between 2010 and 2020Angélica M. Escobar0Guillermo Blustein1Rafael Luque2Gustavo P. Romanelli3Centro de Investigación y Desarrollo en Ciencias Aplicadas (CINDECA), Departamento de Química, Facultad de Ciencias Exactas, UNLP-CCT-CONICET-CICPBA, Calle 47 N 257, 1900 La Plata, ArgentinaCentro de Investigación y Desarrollo en Tecnología de Pinturas (CIDEPINT), CICPBA-CONICET, Calle 52 e/121 y 122, 1900 La Plata, ArgentinaDepartamento de Química Orgánica, Campus de Rabanales, Universidad de Córdoba, Edificio Marie Curie (C-3) Ctra Nnal IV-A, Km. 396 E-14014 Córdoba, SpainCentro de Investigación y Desarrollo en Ciencias Aplicadas (CINDECA), Departamento de Química, Facultad de Ciencias Exactas, UNLP-CCT-CONICET-CICPBA, Calle 47 N 257, 1900 La Plata, ArgentinaOver the past two decades, polyoxometalates (POM) have received considerable attention as solid catalysts, due to their unique physicochemical characteristics, since, first, they have very strong Bronsted acidity, approaching the region of a superacid, and second, they are efficient oxidizers that exhibit rapid redox transformations under fairly mild conditions. Their structural mobility is also highlighted, since they are complex molecules that can be modified by changing their structure or the elements that compose them to model their size, charge density, redox potentials, acidity, and solubility. Finally, they can be used in substoichiometric amounts and reused without an appreciable loss of catalytic activity, all of which postulate them as versatile, economic and ecological catalysts. Therefore, in 2009, we wrote a review article highlighting the great variety of organic reactions, mainly in the area of the synthesis of bioactive heterocycles in which they can be used, and this new review completes that article with the contributions made in the same area for the period 2010 to 2020. The synthesized heterocycles to be covered include pyrimidines, pyridines, pyrroles, indoles, chromenes, xanthenes, pyrans, azlactones, azoles, diazines, azepines, flavones, and formylchromones, among others.https://www.mdpi.com/2073-4344/11/2/291heteropolyacidscatalysisheterocyclesgreen chemistry |
collection |
DOAJ |
language |
English |
format |
Article |
sources |
DOAJ |
author |
Angélica M. Escobar Guillermo Blustein Rafael Luque Gustavo P. Romanelli |
spellingShingle |
Angélica M. Escobar Guillermo Blustein Rafael Luque Gustavo P. Romanelli Recent Applications of Heteropolyacids and Related Compounds in Heterocycle Synthesis. Contributions between 2010 and 2020 Catalysts heteropolyacids catalysis heterocycles green chemistry |
author_facet |
Angélica M. Escobar Guillermo Blustein Rafael Luque Gustavo P. Romanelli |
author_sort |
Angélica M. Escobar |
title |
Recent Applications of Heteropolyacids and Related Compounds in Heterocycle Synthesis. Contributions between 2010 and 2020 |
title_short |
Recent Applications of Heteropolyacids and Related Compounds in Heterocycle Synthesis. Contributions between 2010 and 2020 |
title_full |
Recent Applications of Heteropolyacids and Related Compounds in Heterocycle Synthesis. Contributions between 2010 and 2020 |
title_fullStr |
Recent Applications of Heteropolyacids and Related Compounds in Heterocycle Synthesis. Contributions between 2010 and 2020 |
title_full_unstemmed |
Recent Applications of Heteropolyacids and Related Compounds in Heterocycle Synthesis. Contributions between 2010 and 2020 |
title_sort |
recent applications of heteropolyacids and related compounds in heterocycle synthesis. contributions between 2010 and 2020 |
publisher |
MDPI AG |
series |
Catalysts |
issn |
2073-4344 |
publishDate |
2021-02-01 |
description |
Over the past two decades, polyoxometalates (POM) have received considerable attention as solid catalysts, due to their unique physicochemical characteristics, since, first, they have very strong Bronsted acidity, approaching the region of a superacid, and second, they are efficient oxidizers that exhibit rapid redox transformations under fairly mild conditions. Their structural mobility is also highlighted, since they are complex molecules that can be modified by changing their structure or the elements that compose them to model their size, charge density, redox potentials, acidity, and solubility. Finally, they can be used in substoichiometric amounts and reused without an appreciable loss of catalytic activity, all of which postulate them as versatile, economic and ecological catalysts. Therefore, in 2009, we wrote a review article highlighting the great variety of organic reactions, mainly in the area of the synthesis of bioactive heterocycles in which they can be used, and this new review completes that article with the contributions made in the same area for the period 2010 to 2020. The synthesized heterocycles to be covered include pyrimidines, pyridines, pyrroles, indoles, chromenes, xanthenes, pyrans, azlactones, azoles, diazines, azepines, flavones, and formylchromones, among others. |
topic |
heteropolyacids catalysis heterocycles green chemistry |
url |
https://www.mdpi.com/2073-4344/11/2/291 |
work_keys_str_mv |
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