title: Bridging of bipyridine units by phenylphosphine links: linear and cyclic oligomers and some acid derivatives.
abstract: [structures: see text] Reaction of 6,6'-dibromo-2,2'-bipyridine with phenylphosphine under palladium-promoted cross-coupling conditions provides a variety of linear oligomers bearing two reactive bromo substituents as well as a cyclic dimer, characterized by X-ray crystallography, in which the bipyridine units are constrained to a cis configuration by two phenylphosphine oxide bridges. Derivatives of the linear species containing both carboxylate and phosphonate substituents are readily obtained.
authors.affiliation: Laboratoire de Chimie Moléculaire, UMR CNRS 7509, ECPM-ULP, 25 rue Becquerel, 67087 Strasbourg Cedex, France. ziessel@chimie.u-strasbg.fr
authors.forename: Raymond F
authors.initials: RF
authors.lastname: Ziessel
authors.forename: Loïc J
authors.initials: LJ
authors.lastname: Charbonnière
authors.forename: Samir
authors.initials: S
authors.lastname: Mameri
authors.forename: Franck
authors.initials: F
authors.lastname: Camerel