Heinisch, G. published the artcileSyntheses and reactions of pyridazine derivatives. V. Thermal disproportionation of pyridazinyl-4-carbinols, Safety of Pyridazine-4-carbaldehyde, the publication is Monatshefte fuer Chemie (1974), 105(4), 763-71, database is CAplus.
Pyridazinecarbinols I (R1 = Me, Ph, 4-pyridazinylmethyl) disproportionated at 120° into the ketones II and alkanes III. The mechanism of the disproportionation was discussed. I (R1 = 4-pyridazinylmethyl) was prepared by treating 4-methylpyridazine with Et 4-pyridazinecarboxylate and Me3COK and reducing II (R1 = 4-pyridazinylmethyl). SeO2 oxidation of III (R1 = 4-pyridazinylmethyl) gave trans-1,2-bis(4-pyridazinyl)ethene. Condensation of 4-formylpyridazine with acetone gave 1-(4-pyridazinyl)-1,3-butanedione.
Monatshefte fuer Chemie 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, Safety of Pyridazine-4-carbaldehyde.
Referemce:
https://en.wikipedia.org/wiki/Pyridazine,
Pyridazine | C4H4N2 – PubChem