Ortho-metalated, chelate-stabilized benzylamines of the rare-earth metals (RE) Ar3RE
申请人:Sundermeyer Jörg
公开号:US20110034713A1
公开(公告)日:2011-02-10
The present invention describes homoleptic, ortho-metalated, chelate-stabilized benzylamine complexes of the rare-earth metals. The rare-earth metals are selected from Sc, Y, La, Ce, Pr, Nd, Pm, Sm, Eu, Gd, Tb, Dy, Ho, Er, Tm, Yb, Lu. In the complexes according to the present invention, at least one benzylic proton of the benzylamine ligand is replaced by an alkyl or aryl group. Such complexes are preferred in which both benzylic protons of the benzylamine ligand are replaced by an alkyl- or aryl group. The complexes according to the present invention are produced by reaction of chelate-stabilized rare-earth metal halides with ortho-lithiated aryl ligands at room temperature under inert gas atmosphere. The complexes according to the present invention are thermally stable and suitable for being used as catalysts for the hydroamination of olefins.
本发明描述了稀土金属的同系,正金属化,螯合稳定的苄胺配合物。所选稀土金属为Sc,Y,La,Ce,Pr,Nd,Pm,Sm,Eu,Gd,Tb,Dy,Ho,Er,Tm,Yb,Lu。在本发明的配合物中,苄胺配体的至少一个苄基质子被烷基或芳基取代。首选这样的配合物,其中苄胺配体的两个苄基质子均被烷基或芳基取代。根据本发明,通过在惰性气氛下室温下将螯合稳定的稀土金属卤化物与正金属化的芳基配体反应制备出这些配合物。本发明的配合物在热稳定性上具有优点,适用于作为烯烃的氢胺化反应的催化剂。