Multiple regioselective functionalizations of quinolines via magnesiations

A wide range of polyfunctionalized quinolines was prepared via chemo- and regioselective magnesiation reactions using appropriate Mg reagents, such as i-PrMgCl center dot LiCl, MesMgBr center dot LiCl, Mes(2)Mg center dot 2LiBr, TMPMgCl-LiCl, and TMP2Mg center dot 2LiCl. An application to the total synthesis of the biologically active compound talnetant was performed (six steps, 28%).