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Microwave mediated facile synthesis of some novel pyrazole, pyrazolo [1,5-a] pyrimidine and pyrazolo [5,1-c][1,2,4] triazin derivatives
Egyptian Journal of Chemistry. 2009; 52 (6): 903-914
in English | IMEMR | ID: emr-126465
ABSTRACT
4-Phenyl-2H-pyrazol-3ylamine 3 has been prepared by reaction of 2-phenyl-3-piperidine-1-yl-acrylonitrile [6] with hydrazine hydrate under microwave irradiation. Compound 3 reacted with acetylacetone and ethyl acetoacetate to yield pyrazolopyrimidine derivatives 7 and 8, respectively. Pyrazolopyrimidine derivative II can be formed by reaction of 3 with 2-ethoxymethylene-malononitrile. Compound 3 can be diazotized to yield the diazonium chloride and coupled with 6 to yield pyrazolotriazine derivative 25. Structures of the synthesized compounds were confirmed by their IR and NMR spectroscopic data
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Index: IMEMR (Eastern Mediterranean) Main subject: Pyrazoles / Triazines Language: English Journal: Egypt. J. Chem. Year: 2009

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Index: IMEMR (Eastern Mediterranean) Main subject: Pyrazoles / Triazines Language: English Journal: Egypt. J. Chem. Year: 2009