Yb(OTf)(3) with TMSCl or TMSOTf catalyzed an imino enereaction. The reaction of N-tosylbenzaldimine (1) with alpha-methylstyrene (2) proceeded smoothly to give homoallylic amine 3 in the presence of a catalytic amount of Yb(OTf)(3) and TMSCl. This catalytic system was successfully applied to the imino enereactions of various aldimines with alkenes. This new imino enereaction provides a unique method for