کد مقاله | کد نشریه | سال انتشار | مقاله انگلیسی | نسخه تمام متن |
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59455 | 1419447 | 2014 | 5 صفحه PDF | دانلود رایگان |
Trityl chloride (Ph3CCl) efficiently catalyzes the condensation of 3-methyl-1-phenyl-1H-pyrazol-5(4H)-one and aromatic aldehydes under mild and solvent-free conditions, affording 4,4′-(arylmethylene)-bis(3-methyl-1-phenyl-1H-pyrazol-5-ol)s in high to excellent yields and in short reaction time. The presence of the requisite organocatalytic trityl carbocation (Ph3C+) species was confirmed by analysis of infrared, 1H NMR, and ultra violet spectral data. A plausible mechanism was proposed for the reaction based on the observations and literature precedent.
Graphical AbstractEfficient synthesis of 4,4′-(arylmethylene)-bis(3-methyl-1-phenyl-1H-pyrazol-5-ol)s from 3-methyl-1-phenyl-1H-pyrazol-5(4H)-one and arylaldehydes using Ph3CCl under solvent-free conditions is described. A plausible reaction mechanism for the process based on the experimental data and that from similar literature studies is proposed.Figure optionsDownload as PowerPoint slide
Journal: Chinese Journal of Catalysis - Volume 35, Issue 1, January 2014, Pages 85–89