2,2'-Bipyridyl formation from 2-arylpyridines through bimetallic diyttrium intermediate.

ABSTRACT: An alkylyttrium complex supported by an N,N'-bis(2,6-diisopropylphenyl)ethylenediamido ligand, (ArNCH₂CH₂NAr)Y(CH₂SiMe₃)(THF)₂ (1, Ar = 2,6- ⁱ Pr₂C₆H₃), activated an ortho-phenyl C-H bond of 2-phenylpyridine (2a) to form a (2-pyridylphenyl)yttrium complex (3a) containing a five-membered metallacycle. Subsequently, a unique C(sp²)-C(sp²) coupling of 2-phenylpyridine proceeded through a bimetallic yttrium intermediate, derived from an intramolecular shift of the yttrium center to an ortho-position of the pyridine ring in 3a, to yield a bimetallic yttrium complex (4a) bridged by two-electron reduced 6,6'-

SUBMITTER: Shibata Y 

PROVIDER: S-EPMC5510530 | biostudies-literature | 2015 Oct

REPOSITORIES: biostudies-literature