A modified and convenient method for the preparation of N-phenylpyrazoline derivatives

Ten new N-phenylpyrazoline derivatives have been synthesized in high yields by condensation of chalcones with phenylhydrazine in the presence of potassium carbonate in reflux conditions. The workup is simple and involves treatment with ice-cold water. As compared with the previous method a considerable increase in the reaction rate with better yields has been observed. Published in Khimiya Geterotsiklicheskikh Soedinenii, No. 7, pp. 1032–1036, July, 2006.