Abstract
The reactions of 3-methyl-1-phenyl-5-oxo-Δ 2 -pyrazoline-4-thiocarbohydrazide towards phenyl isothiocyanate, sodium nitrite, cyclohexanone, aromatic aldehydes, and carbon disulphide has been studied. The VilsmeierHaack reaction has been applied on 4-substituted pyrazolone derivatives.
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