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Journal of the Korean Chemical Society (JKCS)

ISSN 1017-2548(Print)
ISSN 2234-8530(Online)
Volume 57, Number 5
JKCSEZ 57(5)
October 20, 2013 

 
Title
Solvent-Free Synthesis of Some1-Acetyl Pyrazoles
Author
Ganesamoorthy Thirunarayanan*, Krishnamoorthy Guna Sekar
Keywords
Solvent-free cyclization cum acetylation, N-acetyl pyrazoles, IR, NMR spectra
Abstract
Some N-acetyl pyrazoles including 1-(3-(3,4-dichlorophenyl)-5-(substituted phenyl)-4,5-dihydro-1H-pyrazole- 1-yl) ethanones have been synthesised by solvent free cyclization cum acetylation of chalcones like substituted styryl 3,4- dichlorophenyl ketones using hydrazine hydrate and acetic anhydride in presence of catalytic amount of fly-ash: H2SO4 catalyst. The yield of these N-acetyl pyrazole derivatives are more than 75%. The synthesised N-acetyl pyrazoline derivatives were characterized by their physical constants and spectral data
Page
599 - 605
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