Author(s):
Kiran Patil1, Vasant Helavi
Email(s):
kiranpatil277@gmail.com
DOI:
10.5958/0974-4150.2018.00087.1 
Address:
Kiran Patil1, 2*, Vasant Helavi2
1Department of Chemistry, Dr. Ghali College, Gadhinglaj, Maharashtra 416502, India
2Department of Chemistry, Rajaram College, Kolhapur, Maharashtra 416004, India
*Corresponding Author
Published In:
Volume - 11,
Issue - 2,
Year - 2018
ABSTRACT:
Chitosan Hydrogel was used for a highly efficient one-pot, four component synthesis of 6-amino-3-methyl-5-cyano-4-aryl-1, 4-dihydropyrano [2, 3-c] pyrazoles from aromatic aldehydes, malononitrile, ethyl acetoacetate and hydrazine hydrate in water as solvent under classical heating. Using microwave heating, reaction times were shortened from 1hr to 2 min. The advantages of this method includes the use of water as a green solvent ,use of recyclable chitosan hydrogel as a green catalyst, short reaction time, easy work up, and excellent yields.
Cite this article:
Kiran Patil, Vasant Helavi. Synthesis of Pyranopyrazoles by using Chitosan Hydrogel as a green and recyclable catalyst. Asian J. Research Chem. 2018; 11(2):477-484. doi: 10.5958/0974-4150.2018.00087.1
Cite(Electronic):
Kiran Patil, Vasant Helavi. Synthesis of Pyranopyrazoles by using Chitosan Hydrogel as a green and recyclable catalyst. Asian J. Research Chem. 2018; 11(2):477-484. doi: 10.5958/0974-4150.2018.00087.1 Available on: https://ajrconline.org/AbstractView.aspx?PID=2018-11-2-47