Constable, Edwin C. published the artcileThe preparation and coordination chemistry of 2,2′:6′,2″-terpyridine macrocycles – 1, Product Details of C7H7ClN2, the publication is Polyhedron (1982), 1(3), 303-6, database is CAplus.
Derivatives of 2,2′:6′,2”-terpyridine were prepared with the intention of forming macrocycles incorporating the 2,2′:6′,2”-terpyridyl moiety. Bis(methylhydrazino)phenylterpyridine I (R = MeNNH2) and a number of metal complexes of this novel pentadentate ligand were prepared Thus, Ortoleva-King reaction of 2-acetyl-6-bromopyridine with iodine and pyridine gave pyridinium iodide II. Cyclocondensation of II and 2-bromo-6-cinnamoylpyridine in refluxing HOAc containing NH4OAc gave I (R = Br). Reaction of the latter with MeNHNH2 gave I (R = MeNNH2) which formed colored complexes with Cr, Mn, Fe, Co, and Ni.
Polyhedron published new progress about 17281-59-3. 17281-59-3 belongs to pyridine-derivatives, auxiliary class Pyridine,Nitrile,Salt, name is 1-(Cyanomethyl)pyridin-1-ium chloride, and the molecular formula is C7H7ClN2, Product Details of C7H7ClN2.
Referemce:
https://en.wikipedia.org/wiki/Pyridine,
Pyridine | C5H5N – PubChem