The author of 《The structures of diazine N-oxides. II. Dipole moments of some alkoxy derivatives of pyrimidine, pyridazine, and their N-oxides》 were Otomasu, Hirotaka; Takahashi, Hiroshi; Ogata, Michihiko. And the article was published in Chemical & Pharmaceutical Bulletin in 1964. Formula: C6H8N2O The author mentioned the following in the article:
cf. CA 58, 5159e. The dipole moments of some diazines and their N-oxides was measured in C6H6 at 25°. [Compound and μ (D.) given]: 4-ethoxy-6-methylpyrimidine (I), 2.20; I N-oxide, 3.95; 3-methoxypyridazine (II), 2.87; II N-oxide (III), 4.80; 3-ethoxypyridazine (IV), (b14 91-3°), 3.17; IV N-oxide (V), (m. 65-7°), 4.76; 3-ethoxy-6-methylpyridazine (VI), 2.86; VI N-oxide, 5.11. The dipole moments were consistent with the moment of cis configuration. The conclusions of Hayashi, et al. (CA 58, 3425c) concerning the position of the N-oxide with respect to the alkoxyl group were confirmed. In the experimental materials used by the author, we found 3-Ethoxypyridazine(cas: 62567-44-6Formula: C6H8N2O)
3-Ethoxypyridazine(cas: 62567-44-6) 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.Formula: C6H8N2O
Referemce:
Pyridazine – Wikipedia,
Pyridazine | C4H4N2 – PubChem