Dostal, Wolfgang published the artcilePyridazines. LI. On the reactivity of pyridazinecarboxaldehydes towards selected active-hydrogen compounds, Recommanded Product: Pyridazine-4-carbaldehyde, the publication is Journal of Heterocyclic Chemistry (1990), 27(5), 1313-21, database is CAplus.
Reactions of 3-pyridazinecarboxaldehyde (I) and 4-pyridazinecarboxaldehyde (II) with various active methylene carbanions were studied. The products obtained in Knoevenagel reactions, Horner-Emmons reactions, and Hantzsch-type reactions are presented. Thus, II was treated with CH2(CN)2 in refluxing EtOH to give 80% pyridazinylmethylenemalononitrile III. Further, I and MeCOCH2CO2Me were refluxed in EtOH and then treated with H2NCMe:CHCO2Et to give 52% the pyridazinyldihydropyridinedicarboxylate IV.
Journal of Heterocyclic Chemistry published new progress about 50901-42-3. 50901-42-3 belongs to pyridazine, auxiliary class Pyridazine,Aldehyde, name is Pyridazine-4-carbaldehyde, and the molecular formula is C5H4N2O, Recommanded Product: Pyridazine-4-carbaldehyde.
Referemce:
https://en.wikipedia.org/wiki/Pyridazine,
Pyridazine | C4H4N2 – PubChem