An improved, two-step synthesis of 2,2′:6′,2″-terpyridine. Donald L. Jameson. A, Lisa E. Guise Tetrahedron Letters Volume 32, Issue 18, 29 April 1991, Pages 1999-2002 http://www.sciencedirect.com/science/article/pii/S0040403900788915 email: [email protected]/* */ Thanks