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- Title
Efficient pseudo five-component synthesis of 4,4′-(arylmethylene)-bis(3-methyl-1-phenyl-1<italic>H</italic>-pyrazol-5-ol) derivatives promoted by a novel ionic liquid catalyst.
- Authors
Abshirini, Zahra; Zare, Abdolkarim
- Abstract
In this research, initial production and characterization of a novel Brønsted-acidic ionic liquid, namely, <italic>N</italic>,<italic>N</italic>,<italic>N</italic>′,<italic>N</italic>′-tetramethylethylenediaminium-<italic>N</italic>,<italic>N</italic>′-disulfonic acid hydrogen sulfate ([TMEDSA][HSO4]2), has been described (characterization was achieved using Fourier-transform infrared spectroscopy, 1H nuclear magnetic resonance (NMR), 13C NMR, and mass and thermal gravimetric spectra). Thereafter, utilization of [TMEDSA][HSO4]2 as a highly effectual catalyst for the synthesis of 4,4′-(arylmethylene)-bis(3-methyl-1-phenyl-1<italic>H</italic>-pyrazol-5-ol) derivatives through the one-pot pseudo five-component reaction of phenylhydrazine (2 eq.) with ethyl acetoacetate (2 eq.) and arylaldehydes (1 eq.) in relatively mild conditions, has been reported.
- Subjects
IONIC liquids; SULFURIC acid; PYRAZOLE derivatives; FOURIER transform infrared spectroscopy; PHENYLHYDRAZINE; ALDEHYDES
- Publication
Zeitschrift für Naturforschung B: A Journal of Chemical Sciences, 2018, Vol 73, Issue 3/4, p191
- ISSN
0932-0776
- Publication type
Article
- DOI
10.1515/znb-2017-0179