Dostal, Wolfgang; Heinisch, Gottfried; Loetsch, Gerhard published an article in Monatshefte fuer Chemie. The title of the article was 《Chemistry of pyridazines. XXXVI. Novel diaza-analogs of 10,11-dihydro-5H-dibenzo[a,d]cyclohepten-5-one》.Name: 3-Chloropyridazine-4-carbonitrile The author mentioned the following in the article:
Procedures for the preparation of the novel tricyclic ketones 10,11-dihydro-5H-benzo[4,5]cyclohepta[1,2-d]pyridazin-5-one (I), 5,6-dihydro-11H-benzo[4,5]cyclohepta[2,1-c]pyridazin-11-one, and 10,11-dihydro-5H-benzo[4,5]cyclohepta[1,2-c]pyridazin-5-one starting from a preformed 1,2-diazine system are proposed. The key intermediates, e.g., II (R = CO2Et) are prepared from (2-phenylethyl)pyridazines, e.g., II (R = H) by introduction of a carboxylic functionality via homolytic alkoxycarbonylation or via a sulfonyl Reissert-type reaction. The experimental process involved the reaction of 3-Chloropyridazine-4-carbonitrile(cas: 1445-56-3Name: 3-Chloropyridazine-4-carbonitrile)
3-Chloropyridazine-4-carbonitrile(cas: 1445-56-3) belongs to pyridazine derivatives.The pyridazine derivatives are mostly present in biologically active compounds and are also present with different pharmacophores. Pyridazines are also important because of their utility in synthetic organic chemistry and in physical organic chemistry.There are reports available for the synthesis of pyridazine and their derivatives by using 2-oxoaldehyes.Name: 3-Chloropyridazine-4-carbonitrile
Referemce:
Pyridazine – Wikipedia,
Pyridazine | C4H4N2 – PubChem