Stanovnik, B. published the artcileHeterocycles. CLVII. Oxidative transformations of some heterocyclic hydrazones with lead tetraacetate, Related Products of pyridine-derivatives, the publication is Croatica Chemica Acta (1977), 49(1), 135-40, database is CAplus.
2-Pyridinecarboxaldehyde phenylhydrazone (I) was treated with MeO2CCCCO2Me in presence of Pb(OAc)4 to give RCONHNPhCOMe (R = pyridyl). Without Pb(OAc)4 RCH:NNPhC(CO2Me):CHCO2Me (R = 2-pyridyl) was formed. I and H2C:CHCN in presence of Pb(OAc)4 gave the pyrazole II. 2-Pyridinecarboxaldehyde 2-pyridylhydrazone and H2C:CHCN in presence of Pb(OAc)4 gave the triazolopyridine III (R = 2-pyridyl, R1 = H). P-methoxybenzaldehyde 3-nitro-2-pyridylhydrazone similarly gave III (R = p-MeOC6H4, R1 = NO2).
Croatica Chemica Acta published new progress about 2215-33-0. 2215-33-0 belongs to pyridine-derivatives, auxiliary class Pyridine,Amine, name is 2-((2-(Pyridin-2-yl)hydrazono)methyl)pyridine, and the molecular formula is C12H10FeO4, Related Products of pyridine-derivatives.
Referemce:
https://en.wikipedia.org/wiki/Pyridine,
Pyridine | C5H5N – PubChem