Lithium Cadmate-Mediated Deprotonative Metalation of Anisole: Experimental and Computational Study

Lithium cadmates bearing different ligands were compared with efficient (TMP)(3)CdLi (TMP = 2,2,6,6-tetra-methylpiperidino) for their ability to deprotometalate anisole. The generated arylcadmates were evidenced using I-2. The results show that it is possible to replace only one of the TMP (with a piperidino, a diisopropylamino, a butyl, or a sec-butyl) without important yield drop. In the light of DFT calculations, reaction pathways were proposed for the deprotocadmations of anisole using a triamino, an alkyldiamino, and an aminodialkyl cadmate.