[GRAPHICS]Ytterbium trifluoromethanesulfonate [Yb(OTf)(3)] catalyzed the imino ene reaction of N-tosyl aldimine with alpha-methylstyrene to give a homoallylamine in moderate yield. Furthermore, addition of a catalytic amount of chlorotrimethylsilane (TMSCI) dramatically enhanced the imino ene reaction.
Imino Ene Reaction Catalyzed by Ytterbium(III) Triflate and TMSCl or TMSOTf
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