... as 2,2'-Bipyridine, 4,4'-dibromo-; 4,4′-dibromo-2,2′-dipyridine; 4-bromo-2-(4-bromo(2-pyridyl))pyridine. 4,4'-Dibromo-2,2'-bipyridyl is ... make other derivatives with conjugate system expansion at 4,4’-site. UCHEM has been focusing on 4,4'-dibromo-2,2'-bipyridyl and its derivatives ... :6813-38-3 Dimethyl 2,2'-bipyridine-4,4'-dicarboxylate CAS: 71071-46-0 4,4'-Bis(hydroxymethyl)-2,2'-bipyridine CAS: 109073 ...