Author: Potdar, Mahesh K.; Mohile, Swapnil S.; Salunkhe, Manikrao M.
Description: 1-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.
Subject headings: Coumarin synthesis; Pechmann condensation; Phenols; Lewis acid catalyst
Publication year: 2001
Journal or book title: Tetrahedron Letters
Volume: 42
Issue: 52
Pages: 9285-9287
Find the full text: https://www.sciencedirect.com/science/article/pii/S004040390102041X
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Serial number: 3423