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

Efficient atom-economical solvent-free one-pot multicomponent synthesis of... An efficient one-pot, atom-economical, three-component reaction of aromatic aldehydes, dimedone, and malononitrile was developed, for the first time, using SiO2-OK as an efficient solid base reusable catalyst, producing various substituted 2-amino-4H-benzo[b]pyran derivatives in good to excellent yields, under solvent-free conditions at 80 °C. This synthesis was confirmed to follow the group–assistant–purification chemistry process, which can avoid traditional chromatography and recrystallization purifications. The catalyst is inexpensive and easily obtained, stable and storable, and easily recycled, being reused at least six times without any marked change in its catalytic activity. http://www.deepdyve.com/assets/images/DeepDyve-Logo-lg.png Research on Chemical Intermediates Springer Journals

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

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Publisher
Springer Netherlands
Copyright
Copyright © 2013 by Springer Science+Business Media Dordrecht
Subject
Chemistry; Catalysis; Physical Chemistry; Inorganic Chemistry
ISSN
0922-6168
eISSN
1568-5675
D.O.I.
10.1007/s11164-013-1322-x
Publisher site
See Article on Publisher Site

Abstract

An efficient one-pot, atom-economical, three-component reaction of aromatic aldehydes, dimedone, and malononitrile was developed, for the first time, using SiO2-OK as an efficient solid base reusable catalyst, producing various substituted 2-amino-4H-benzo[b]pyran derivatives in good to excellent yields, under solvent-free conditions at 80 °C. This synthesis was confirmed to follow the group–assistant–purification chemistry process, which can avoid traditional chromatography and recrystallization purifications. The catalyst is inexpensive and easily obtained, stable and storable, and easily recycled, being reused at least six times without any marked change in its catalytic activity.

Journal

Research on Chemical IntermediatesSpringer Journals

Published: Jun 29, 2013

References

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