The Synthesis of a New Dumbbell-shaped Compound of Bis-4,4'-bipyridine Bridged by 2,2'-Bipyridine

The title compound 5 was synthesized in 45% yield by the reaction of compound 3 with a, a-bis (bromomethyl)-2, 2-bipyridine in CH3CN at 70℃ for 24 h.