14957-18-7Relevant articles and documents
Solvent-free condensation of aromatic aldehydes and 2,3-dimethyl-1-phenyl-3-pyrazolin-5-one by p-toluenesulfonic acid
Koshima, Hideko,Hamada, Mitsuo
, p. 1087 - 1088 (2002)
Solvent-free condensation easily occurred by mixing aromatic aldehydes and 2,3-dimethyl-1-phenyl-3-pyrazoline-5-one (antipyrine) in the presence of p-toluenesulfonic acid as a solid acid catalyst at room temperature to give the corresponding disubstituted