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 building blocks 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.
我们在这里报告了3 / 5-三氟甲基吡唑衍生物向相应的NH-吡唑-3 / 5-羧酸的转化。此外,从4-或5-碘代-3 / 5-三氟甲基吡唑的结构单元以及使用Suzuki-Miyaura或Negishi反应,再进行三氟甲基水解,我们说明了对许多系列的NH-吡唑-3/5的短暂访问和原始访问-羧酸否则难以制备。