[reaction: see text] The ortho position of the aromatic ring of pyridyl group-substituted aromatic compounds is directly arylated or alkenylated with organic halides in the presence of a catalytic amount of a ruthenium(II)-phosphine complex.

The ortho position of the aromatic ring of pyridyl groupsubstituted aromatic compounds was directly arylated with tetraarylstannanes in the presence of a catalytic amount of a rhodium(I)-phosphine complex.

[reaction: see text] The ortho position of the aromatic ring of imino group substituted aromatic compounds is directly arylated and alkenylated with organic halides in the presence of a catalytic amount of a ruthenium(II)-phosphine complex.

No abstract

Polyphenyl derivatives Polyphenyl derivatives Q 0700Rhodium-HMPT-Catalyzed Direct ortho Arylation of Phenols with Aryl Bromides. -Various phenols undergo direct o-arylation with phenyl bromides under optimized conditions to give mono-and diarylated products. A mechanism, involving the formation of aryl phosphites as key intermediates from the phenols and HMPA is proposed. -(OI*, S.; WATANABE, S.-I.; FUKITA, S.; INOUE*, Y.; Tetrahedron Lett. 44 (2003) 48, 8665-8668; Dep. Mater. Chem., Grad. Sch. Eng., Tohoku Univ.,