Abstract
Article history: Received March 20, 2013 Received in Revised form July 7, 2013 Accepted 10 July 2013 Available online 12 July 2013 An efficient, green, and facile four-component reaction for the preparation of pyrano[2,3c]pyrazole derivatives through the condensation reaction of aryl aldehydes, ethyl acetoacetate, malononitrile, and hydrazine hydrate or phenyl hydrazine in the presence of commercially available organocatalyst sodium benzoate under aqueous condition is reported. The products are produced with high yields and in shorter reaction times. It also is mild, safe, green and environmental friendly. © 2013 Growing Science Ltd. All rights reserved.
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