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Efficient atom-economical solvent-free one-pot multicomponent synthesis of 2-amino-4H-benzo[b]pyrans catalyzed by solid base SiO2-OK as a reusable catalyst

โœ Scribed by Chandralekha, Elangovann; Thangamani, Arumugam; Valliappan, Ramiah

Book ID
120523575
Publisher
Springer Netherlands
Year
2013
Tongue
English
Weight
380 KB
Volume
41
Category
Article
ISSN
0922-6168

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One-pot synthesis of 2-amino-3-cyano-4-arylsubstituted tetrahydrobenzo[b]pyrans catalysed by silica gel-supported polyphosphoric acid (PPA-SiO2) as an efficient and reusable catalyst
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