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Brønsted Acidic Ionic Liquids and Their Zwitterions: Synthesis, Characterization and pKa Determination

✍ Scribed by Zhaofu Fei; Dongbin Zhao; Tilmann J. Geldbach; Rosario Scopelliti; Paul J. Dyson


Publisher
John Wiley and Sons
Year
2004
Tongue
English
Weight
309 KB
Volume
10
Category
Article
ISSN
0947-6539

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A convenient and efficient method for the synthesis of pyrazolo [3,4-d]pyrimidin-4-ones via heterocyclization reaction of 5-amino-1H-pyrazole-4-carboxamides with triethyl orthoesters using two Brønsted-acidic ionic liquids, as efficient homogeneous catalysts under solvent-free conditions is describ