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- Title
An unexpected catalytic synthesis of novel and known bis(pyrazolyl) methanes by the use of α-aryl-N-phenyl nitrones in aqueous media.
- Authors
Eskandari, Khalil; Karami, Bahador; Khodabakhshi, Saeed
- Abstract
Reaction of -aryl-N-phenyl nitrones with 3-methyl-1-phenyl-2-pyrazoline-5-one in the presence of a catalytic amount of silica tungstic acid in EtOH/H2O afforded, unexpectedly, high yields of bis(3-hydroxy-1-phenylpyrazolyl)-arylmethanes instead of the two possible 1,3-addition products. This is the first report of the synthesis of bis(3-hydroxy-1-phenylpyrazolyl)-arylmethanes via the reaction of nitrones and a pyrazolin-5-one. A possible mechanism for the process is suggested.
- Subjects
PYRAZOLYL compounds; METHANESULFONATES; NITRONES; PYRAZOLINONES; SILICA; TUNGSTIC acid
- Publication
Journal of Chemical Research, 2014, Vol 38, Issue 10, p600
- ISSN
1747-5198
- Publication type
Article
- DOI
10.3184/174751914X14114871789226