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Ionic-liquid-catalyzed green synthesis of coumarin derivatives under solvent-free conditions（图）
Ionic liquid Pechmann reaction Solvent-free synthesis Phloroglucinol Pyrano[2,3-h]coumarin
2013/9/25
Brönsted acidic ionic liquids, namely 2-pyrrolidonium hydrogen sulfate, N-methyl-2-pyrrolidonium hydrogen sulfate, N-methyl-2-pyrrolidonium dihydrogen phosphate, (4-sulfobutyl)tris(4-sulfophenyl)...