Hauser bases (R2NMgBr) and magnesium diamides [(R2N) 2Mg] are known,'S2 but their uses in organic synthesis have barely been expl~ red.~.~ With this communication we introduce the first of our work with these bases and demonstrate their exceptional utility and bright future. Ortho lithiation of substituted aromatics has been developed elegantly into one of the major tools of organic synthesi~.~ It (1)(a) Hauser, CR; Walker, H, GJ Am. Chem. ...