期刊
CHEMICAL PAPERS
卷 65, 期 5, 页码 714-720出版社
VERSITA
DOI: 10.2478/s11696-011-0064-8
关键词
tetrahydrobenzo[b] pyrans; PPA-SiO2; heterogeneous catalysis; aqueous media
资金
- Islamic Azad University, Mashhad Branch
A convenient method for the synthesis of tetrahydrobenzo[b]pyrans by a one-pot three-component cyclocondensation of dimedone, aryl aldehydes, and malononitrile in water using silica gel-supported polyphosphoric acid (PPA-SiO2) as an efficient and reusable catalyst is described. The present methodology offers several advantages, such as a simple procedure with ease of handling, short reaction time, high yields, and the absence of any volatile and hazardous organic solvents.
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