Pyrazole-3/5-carboxylic acids from 3/5-trifluoromethyl NH-pyrazoles
作者:Mikhail S. Ermolenko、Sandrine Guillou、Yves L. Janin
DOI:10.1016/j.tet.2012.10.034
日期:2013.1
transformation of 3/5-trifluoromethylpyrazoles derivative into the corresponding NH-pyrazole-3/5-carboxylic acids. Moreover, from 4- or 5-iodinated-3/5-trifluoromethylpyrazoles buildingblocks and the use of Suzuki–Miyaura 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.