A. Zare, Maria Merajoddin, A. Moosavi‐Zare
2014
Citations
0
Influential Citations
17
Citations
Journal
Chinese Journal of Catalysis
Abstract
Abstract Trityl chloride (Ph 3 CCl) efficiently catalyzes the condensation of 3-methyl-1-phenyl-1 H -pyrazol-5(4 H )-one and aromatic aldehydes under mild and solvent-free conditions, affording 4,4′-(arylmethylene)-bis(3-methyl-1-phenyl-1 H -pyrazol-5-ol)s in high to excellent yields and in short reaction time. The presence of the requisite organocatalytic trityl carbocation (Ph 3 C + ) species was confirmed by analysis of infrared, 1 H NMR, and ultra violet spectral data. A plausible mechanism was proposed for the reaction based on the observations and literature precedent.