An Efficient Four-Component, One-Pot Synthesis of 6-Amino-4-Aryl-3- Methyl-2,4-Dihydropyrano[2,3-C]Pyrazole-5-Carbonitriles Under Phase- Transfer Catalyst

Author(s): Keyume Ablajan , Wang Liju , Anagu Tuoheti , Yakefujiang Kelimu .

Journal Name: Letters in Organic Chemistry

Volume 9 , Issue 9 , 2012

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Abstract:

A series of 6-amino-4-aryl-3-methyl-2,4-dihydropyrano[2,3-c]pyrazole-5-carbonitriles (5a–5j) were synthesized by four-component one-pot reaction of methyl acetoacetate (or ethyl acetoacetate), hydrazine hydrate, arylaldehydes and malononitrile in the presence of phase transfer catalyst. A highest yield of product was obtained while using 30 mol % of HDBAC as a catalyst.

Keywords: Four-component reaction, one-pot synthesis, phase-transfer catalysis, pyrano[2, 3-c]pyrazole, phase-transfer catalysis, Multi component reaction (MCR), bioactive, pharmacological, Green method, catalyst, CN moiety

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Article Details

VOLUME: 9
ISSUE: 9
Year: 2012
Page: [639 - 643]
Pages: 5
DOI: 10.2174/157017812803521135
Price: $58

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