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ChemInform Abstract: Application of Silica Gel-Supported Polyphosphoric Acid (PPA/SiO2) as a Reusable Solid Acid Catalyst to the Synthesis of 3-Benzoylisoxazoles and Isoxazolines.

โœ Scribed by Ken-ichi Itoh; Tadashi Aoyama; Hiroaki Satoh; Yuki Fujii; Hiroshi Sakamaki; Toshio Takido; Mitsuo Kodomari

Book ID
112042855
Publisher
John Wiley and Sons
Year
2012
Weight
40 KB
Volume
43
Category
Article
ISSN
0931-7597

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โœ Abolghasem Davoodnia; Sadegh Allameh; Samineh Fazli; Niloofar Tavakoli-Hoseini ๐Ÿ“‚ Article ๐Ÿ“… 2011 ๐Ÿ› Versita ๐ŸŒ English โš– 255 KB

## Abstract 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 pres