| dc.creator | Bennardi, Daniel Oscar | |
| dc.creator | Romanelli, Gustavo Pablo | |
| dc.creator | Jios, Jorge Luis | |
| dc.creator | Autino, Juan Carlos | |
| dc.creator | Baronetti, Graciela Teresita | |
| dc.creator | Thomas, Horacio Jorge | |
| dc.date | 2008 | |
| dc.date | 2019-10-10T13:55:44Z | |
| dc.identifier | http://sedici.unlp.edu.ar/handle/10915/83026 | |
| dc.description | In this work, we report the use of bulk and silica-supported Wells-Dawson acid (H2P2W18O62.24H2O) as reusable, heterogeneous catalysts to obtain substituted flavones and chromones for the cyclization of 1-(2-hydroxyphenyl)-3-aryl-1,3-propanediones. The reaction experiments were performed using toluene as solvent at reflux and in the absence of solvent, at 110°C. Under these conditions eleven examples were obtained with very good yields (82-91%) and high selectivity. The catalysts were easily recycled and reused without loss of their catalytic activity. The presented synthetic method is a simple, clean and environmentally friendly alternative for synthesizing substituted flavones and chromones. | |
| dc.description | Centro de Investigación y Desarrollo en Ciencias Aplicadas | |
| dc.description | Facultad de Ciencias Agrarias y Forestales | |
| dc.description | Laboratorio de Servicios a la Industria y al Sistema Científico | |
| dc.format | application/pdf | |
| dc.format | 123-130 | |
| dc.language | en | |
| dc.rights | http://creativecommons.org/licenses/by-nc/3.0/ | |
| dc.rights | Creative Commons Attribution-NonCommercial 3.0 Unported (CC BY-NC 3.0) | |
| dc.subject | Química | |
| dc.subject | Acid catalysis | |
| dc.subject | Chromones | |
| dc.subject | Flavones | |
| dc.subject | H2P2W18O62.24H2O | |
| dc.subject | Silica gel-supported catalyst | |
| dc.title | Synthesis of substituted flavones and chromones using a Wells-Dawson heteropolyacid as catalyst | |
| dc.type | Articulo | |
| dc.type | Articulo | |
