KG-60-piperazine as an efficient heterogeneous catalyst for three-component synthesis of 2-amino-2H-chromenes

KG-60-piperazine as an efficient heterogeneous catalyst for three-component synthesis of... Res Chem Intermed (2015) 41:6023–6032 DOI 10.1007/s11164-014-1718-2 KG-60-piperazine as an efficient heterogeneous catalyst for three-component synthesis of 2-amino-2H- chromenes • • Neda Golari Mohammad Rahimizadeh Mehdi Bakavoli Esmail Rezaei-Seresht Received: 26 February 2014 / Accepted: 16 May 2014 / Published online: 10 June 2014 Springer Science+Business Media Dordrecht 2014 Abstract Silica-supported piperazine (KG-60-piperazine), as a mild and efficient basic catalyst, has played a role in the three-component reaction of some substituted benzaldehydes, malononitrile, and phenols, to yield the corresponding 2-amino-2H- chromenes. The catalyst showed general utility and reusability and was reused for four additional cycles without significant loss of its activity. Moreover, the effect of some reaction parameters such as catalyst mol%, reaction time, solvent, and temperature was investigated. Keywords 2-Amino-2H-chromenes  KG-60-piperazine  Three-component reaction  Heterogeneous catalyst Introduction Immobilization of catalytically active species on inorganic solid materials enables not only generation of recyclable catalysts but also greater catalytic activities compared with their homogeneous precursors and analogs owing to the unique environments of these surfaces [1]. Catalysts and reagents immobilized upon a range of insoluble supports have been utilized and reported since the late 1960s [2]. Electronic supplementary material The online version of this article (doi:10.1007/s11164-014-1718-2) contains supplementary http://www.deepdyve.com/assets/images/DeepDyve-Logo-lg.png Research on Chemical Intermediates Springer Journals

KG-60-piperazine as an efficient heterogeneous catalyst for three-component synthesis of 2-amino-2H-chromenes

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Publisher
Springer Netherlands
Copyright
Copyright © 2014 by Springer Science+Business Media Dordrecht
Subject
Chemistry; Catalysis; Physical Chemistry; Inorganic Chemistry
ISSN
0922-6168
eISSN
1568-5675
D.O.I.
10.1007/s11164-014-1718-2
Publisher site
See Article on Publisher Site

Abstract

Res Chem Intermed (2015) 41:6023–6032 DOI 10.1007/s11164-014-1718-2 KG-60-piperazine as an efficient heterogeneous catalyst for three-component synthesis of 2-amino-2H- chromenes • • Neda Golari Mohammad Rahimizadeh Mehdi Bakavoli Esmail Rezaei-Seresht Received: 26 February 2014 / Accepted: 16 May 2014 / Published online: 10 June 2014 Springer Science+Business Media Dordrecht 2014 Abstract Silica-supported piperazine (KG-60-piperazine), as a mild and efficient basic catalyst, has played a role in the three-component reaction of some substituted benzaldehydes, malononitrile, and phenols, to yield the corresponding 2-amino-2H- chromenes. The catalyst showed general utility and reusability and was reused for four additional cycles without significant loss of its activity. Moreover, the effect of some reaction parameters such as catalyst mol%, reaction time, solvent, and temperature was investigated. Keywords 2-Amino-2H-chromenes  KG-60-piperazine  Three-component reaction  Heterogeneous catalyst Introduction Immobilization of catalytically active species on inorganic solid materials enables not only generation of recyclable catalysts but also greater catalytic activities compared with their homogeneous precursors and analogs owing to the unique environments of these surfaces [1]. Catalysts and reagents immobilized upon a range of insoluble supports have been utilized and reported since the late 1960s [2]. Electronic supplementary material The online version of this article (doi:10.1007/s11164-014-1718-2) contains supplementary

Journal

Research on Chemical IntermediatesSpringer Journals

Published: Jun 10, 2014

References

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