The synthesis of the shape-persistentmacrocycles 10a and 10b with two bipyridineunits in opposing sides by Hagihara/Sonogashira cross-coupling chemistry of suitably functionalized building blocks is reported. X-ray analysis of single crystals of 10b shows a layered structure with channels filled with solvent molecules and parts of the flexible chains. with which the cycle is decorated for solubility
Synthesis of 5,5′-Disubstituted 2,2′-Bipyridines for Modular Chemistry
作者:Oliver Henze、Uwe Lehmann、A. Dieter Schlüter
DOI:10.1055/s-1999-3445
日期:1999.4
A 0.5-11 g scale synthesis of the 5,5′-disubstituted 2,2′-bipyridines 8 is described. The pyridine units are connected to one another by Pd-catalyzed cross-coupling reactions. This method allows one to introduce bromo functions and flexible chains at the terminal phenyls which optimizes this class of bidentate ligands for supra- and macromolecular applications.