期刊
JOURNAL OF MOLECULAR CATALYSIS A-CHEMICAL
卷 255, 期 1-2, 页码 49-52出版社
ELSEVIER
DOI: 10.1016/j.molcata.2006.03.051
关键词
phenols; ethyl acetoacetate; methyl acetoacetate; cournarins; HClO4 center dot SiO2; recyclable heterogeneous catalyst; solvent-free conditions
Substituted coumarins are synthesized from phenols and ethyl acetoacetate or methyl acetoacetate via Pechmann condensation using heterogeneous recyclable catalyst (HClO4 (.) SiO2) under solvent-free conditions. This method is simple, cost effective, requires short reaction times and benefits from the elimination of production of acidic waste streams generated with conventional acid catalyst to give good yields. (c) 2006 Elsevier B.V. All rights reserved.
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