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dc.date.accessioned 2023-08-15T18:08:03Z
dc.date.available 2023-08-15T18:08:03Z
dc.date.issued 2004
dc.identifier.uri http://sedici.unlp.edu.ar/handle/10915/156371
dc.description.abstract Substituted coumarins are synthesized from phenols and b-ketoesters by the Pechmann reaction, using a Wells–Dawson heteropolyacid (H6P2W18O62Æ24H2O) as catalyst by a solvent-free procedure. This one requires low reaction times, 130°C temperature and as little as 1mol% of Wells–Dawson acid, obtaining good to excellent yields of coumarins. The catalyst showed to be reusable with no differences in the yields. The results are compared with those of the reactions performed in toluene solution. The presented synthetic procedure is a convenient, clean and fast alternative for synthesizing 4-substituted coumarins (17 examples). en
dc.format.extent 8935-8939 es
dc.language en es
dc.subject Coumarin es
dc.subject Heteropolyacid es
dc.subject Wells–Dawson catalyst es
dc.subject Pechmann reaction es
dc.subject 4-Methylumbelliferone es
dc.title A solvent-free synthesis of coumarins using a Wells-Dawson heteropolyacid as catalyst en
dc.type Articulo es
sedici.identifier.other doi:10.1016/j.tetlet.2004.09.183 es
sedici.identifier.issn 0040-4039 es
sedici.creator.person Romanelli, Gustavo Pablo es
sedici.creator.person Bennardi, Daniel Oscar es
sedici.creator.person Ruiz, Diego Manuel es
sedici.creator.person Baronetti, Graciela Teresita es
sedici.creator.person Thomas, Horacio Jorge es
sedici.creator.person Autino, Juan Carlos es
sedici.subject.materias Química es
sedici.description.fulltext true es
mods.originInfo.place Laboratorio de Estudio de Compuestos Orgánicos es
mods.originInfo.place Centro de Investigación y Desarrollo en Ciencias Aplicadas es
mods.originInfo.place Universidad de Buenos Aires es
mods.originInfo.place Consejo Nacional de Investigaciones Científicas y Técnicas es
sedici.subtype Articulo es
sedici.rights.license Creative Commons Attribution 4.0 International (CC BY 4.0)
sedici.rights.uri http://creativecommons.org/licenses/by/4.0/
sedici.description.peerReview peer-review es
sedici.relation.journalTitle Tetrahedron Letters es
sedici.relation.journalVolumeAndIssue vol. 45, no. 48 es


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Creative Commons Attribution 4.0 International (CC BY 4.0) Except where otherwise noted, this item's license is described as Creative Commons Attribution 4.0 International (CC BY 4.0)