An environmentally friendly, chemoselective, and efficient protocol for the preparation of coumarin derivatives by Pechman condensation reaction using new and reusable heterogeneous Lewis acid catalyst polystyrene-supported GaCl3 - 25/03/13
, Sara Mohammadian| páginas | 8 |
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Abstract |
An environmentally benign Pechman protocol for the one-pot synthesis of 4-substituted coumarins through the condensation reactions of phenol substrates with β-ketoesters using polystyrene-supported GaCl3 (PS–GaCl3) as a highly active and reusable solid Lewis acid catalyst under mild and heterogeneous conditions in good to excellent yields is described. This new protocol is easy, simple, cost-effective, chemoselective, and in addition has the advantages of easy availability, stability, reusability and eco-friendly character of the catalyst, high to excellent yields, simple experimental and work-up procedure.
El texto completo de este artículo está disponible en PDF.Keywords : Coumarin, Polymer-supported catalyst, Phenols, Gallium trichloride
Esquema
Vol 16 - N° 3
P. 271-278 - mars 2013 Regresar al númeroBienvenido a EM-consulte, la referencia de los profesionales de la salud.
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