US 2011/0034713 A1 · Ortho-metalated, chelate-stabilized benzylamines of the rare-earth metals (RE) Ar3RE

Abstract

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.

Claims7

Dependent claims

Homoleptic complexes according to formula (I):

wherein
RE represents a rare-earth metal selected from Sc, Y, La, Ce, Pr, Nd, Pm, Sm, Eu, Gd, Tb, Dy, Ho, Er, Tm, Yb, Lu,
R1 and R2 are selected, independent of one another, from hydrogen, a linear or branched alkyl group with 1 to 10 carbon atoms, or an aryl group
or
R1 and R2 together represent 1,ω-alkyldiyl group, selected from 1,4-butandiyl or 1,5-pentandiyl,
R3 and R4 are selected, independent of one another, from a linear or branched alkyl group with 1 to 10 carbon atoms, an aryl group or a trialkylsilyl group —SiR5, wherein R5 represents a linear or branched alkyl group with 1 to 10 carbon atoms,
and wherein
at least one of both residues R1 and R2 is a group different from hydrogen.

5 more elements

Dependencies are inferred from the claim text.

Ortho-metalated, chelate-stabilized benzylamines of the rare-earth metals (RE) Ar3RE

Life of this patent

Ortho-metalated, chelate-stabilized benzylamines of the rare-earth metals (RE) Ar3RE

Life of this patent

Abstract

Claims7