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Pyrazole-3/5-carboxylic acids from 3/5-trifluoromethyl NH-pyrazoles

Abstract : We report here the transformation of 3/5-trifluoromethylpyrazoles derivative into the corresponding NH-pyrazole-3/5-carboxylic acids. Moreover, from 4- or 5-iodinated-3/5-trifluoromethylpyrazoles building blocks and the use of SuzukieMiyaura or Negishi reactions followed by the trifluoromethyl hydrolysis, we illustrate short and original accesses to many series of NH-pyrazole-3/5-carboxylic acids otherwise difficult to prepare.
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Contributor : Yves Janin Connect in order to contact the contributor
Submitted on : Thursday, November 22, 2012 - 11:02:44 AM
Last modification on : Tuesday, October 18, 2022 - 4:16:30 AM



Mikhail S. Ermolenko, Sandrine Guillou, Yves Louis Janin. Pyrazole-3/5-carboxylic acids from 3/5-trifluoromethyl NH-pyrazoles. Tetrahedron, 2013, 69 (1), pp.257-263. ⟨10.1016/j.tet.2012.10.034⟩. ⟨pasteur-00755935⟩



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