Synthesis of Vinyl-Substituted Polypyridyl Ligands through Suzuki–Miyaura Cross-Coupling of Potassium Vinyltrifluoroborate with Bromopolypyridines

Abstract

Suzuki–Miyauru cross-coupling of bromopolypyridines with potassium vinyltrifluoroborate affords vinyl-substituted polypyridyl ligands in moderate to good yields. This reaction allows simple and practical syntheses of numerous vinyl-substituted polypyridines, such as 4′-vinyl-2,2′:6′,2′′-terpyridine, 5,5′-divinyl-2,2′-bipyridine, and 4,4′-divinyl-2,2′-bipyridine. In addition, a new ruthenium complex, [Ru(5,5′-divinyl-2,2′-bipyridine)3]2+, was synthesized and found to undergo reductive electropolymerization smoothly