M. Potdar, S. S. Mohile, M. Salunkhe
Dec 24, 2001
Citations
1
Influential Citations
207
Citations
Quality indicators
Journal
Tetrahedron Letters
Abstract
Butyl-3-methylimidazolium chloroaluminate, (bmim)Cl·2AlCl3 ionic liquid is used as an alternative to conventional acid catalysts in the Pechmann condensation of phenols with ethyl acetoacetate leading to the formation of coumarin derivatives. The reaction time is reduced drastically even at ambient conditions. The ionic liquid plays the dual role of solvent and Lewis acid catalyst providing a quick and efficient route to the syntheses of coumarins. © 2001 Elsevier Science Ltd. All rights reserved.