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Some substituted 1-thiocarbomyl pyrazolines including 3-(3,4-dichlorophenyl)-5-(substituted phenyl)-4,5-dihydro-1H-pyrazole-1-carbothioamides using solvent-free preheated fly-ash catalyzed cyclization between chalcones and thiosemicarbazide microwave irradiation. The yields of these thiocarbomyl pyrazolines are more than 80 %. The purities of these synthesised pyrazoline derivatives are checked by their physical constants and spectral data earlier reported in the literature The spectral data of these 3-(3,4-dichlorophenyl)-5-(substituted phenyl)-4,5-dihydro-1H-pyrazole-1carbothioamides had been correlated, using single and multi-linear regression analysis.

international letters of chemistry, physics and astronomy

Preheated Fly-Ash Catalyzed Cyclization of Chalcones: Synthesis of some Substituted Pyrazole-1-Carbothioamides and Spectral Correlations in 3-(3,4-Dichlorophenyl)-5-(Substituted Phenyl)-4,5-Dihydro-1H-Pyrazole-1-Carbothioamides