American Chemical Society
jo051586g_si_004.pdf (921.64 kB)

Bridging of Bipyridine Units by Phenylphosphine Links:  Linear and Cyclic Oligomers and Some Acid Derivatives

Download (921.64 kB)
journal contribution
posted on 2005-11-25, 00:00 authored by Raymond F. Ziessel, Loïc J. Charbonnière, Samir Mameri, Franck Camerel
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.