Synthesis and Catalytic Characteristics of Novel Constrained-Geometry Organoactinide Catalysts. The First Example of Actinide-Mediated Intramolecular Hydroamination

The synthesis, characterization, and reactivity of a series of organoactinide constrained-geometry
complexes, (CGC)An(NRR‘)2 (CGC = Me2Si(η5-Me4C5)(tBuN); An = Th, 1; An = U, 2; R = R‘ = Me, a; R = Et,
R‘ = Me, b; R = R‘ = Et, c), are reported. These
complexes are effective precatalysts for intramolecular
catalytic hydroamination/cyclization of aminoalkenes
and aminoalkynes. Comparisons of structure and reactivity are drawn with previously reported trivalent
organolanthanide CGC catalytic systems.