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Synthesis of Mono- and Dibromo-Derivatives of 1-Phenylpyrazol-3-ol

Institute of Synthetic Chemistry, Kaunas University of Technology, Radvilėnų pl. 19, LT-50254 Kaunas, Lithuania
Department of Drug and Natural Product Synthesis, Faculty of Life Sciences, University of Vienna, Althanstrasse 14, A-1090 Vienna, Austria
Author to whom correspondence should be addressed.
Molbank 2007, 2007(3), M551;
Received: 30 January 2007 / Revised: 15 February 2007 / Published: 30 May 2007
Dependent on the reaction conditions, 1-phenylpyrazol-3-ol and bromine give either 4-bromo-1-phenylpyrazol-3-ol (2a) or 4-bromo-1-(4-bromophenyl)pyrazol-3-ol (2b). Treatment of 2a or 2b with refluxing acetic anhydride leads to the corresponding O-acetyl derivatives 3a and 3b, respectively. Detailed spectroscopic data (1H NMR, 13C NMR, 15N NMR, MS, IR) for 2b, 3a and 3b are presented. View Full-Text
Keywords: 1-phenylpyrazol-3-ol; bromination; O-acetylation; NMR spectroscopy 1-phenylpyrazol-3-ol; bromination; O-acetylation; NMR spectroscopy
MDPI and ACS Style

Nedzelskytė, E.; Martynaitis, V.; Šačkus, A.; Eller, G.A.; Holzer, W. Synthesis of Mono- and Dibromo-Derivatives of 1-Phenylpyrazol-3-ol. Molbank 2007, 2007, M551.

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