A practical ortho,meta, (or even ortho,ortho') magnesiation of trifluoroacetamides of anilines, aminopyridines, and aminopyrazines at room temperature was performed with TMPMgCl⋅LiCl or TMP(2) Mg⋅2 LiCl. These magnesiations are compatible with several carbonyl functionalities and allow access to polysubstituted anilides in satisfactory yields.
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Monzón et al. (2012) studied this question.
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