Most of the compounds have physiologically active properties, and their biological properties are often attributed to the heteroatoms contained in their molecules, and most of these heteroatoms also appear in cyclic structures. A Journal, Pontif. Acad. Sci. Acta called Polarographic reducibility of pyrrole and pyrrole substitutes, Author is Bonino, G. B., which mentions a compound: 616-43-3, SMILESS is CC1=CNC=C1, Molecular C5H7N, Computed Properties of C5H7N.
cf. C.A. 38, 1230.6. 1-Methylpyrrole, 2-methylpyrrole, 1-allylpyrrole, 2,4-dimethylpyrrole, 2,5-dimethylpyrrole, 3-methylpyrrole, 4-ethylpyrrole, 2,3,5-trimethylpyrrole, 2,5-dimethylpyrrole, 3-ethylpyrrole, 2,4-dimethylpyrrole, and pure 2,3,4,5-tetramethylpyrrole (I) (the latter obtained by the action of K methylate on trimethylpyrrole) in 0.1 N LiCl solution in 80% EtOH were not reduced polarographically. I obtained by the Piloty and Hirsch method (cf. C.A. 7, 1365), containing tetramethylpyrazine (II) as an impurity, showed the same polarographic wave of reduction as II. The findings of Dezelic (Boll. intern. acad. croata sci. e belle arti, 1941) are not correct.
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Reference:
Synthesis and Crystal Structure of a Chiral C3-Symmetric Oxygen Tripodal Ligand and Its Applications to Asymmetric Catalysis,
Chiral lanthanide(III) complexes of sulphur–nitrogen–oxygen ligand derived from aminothiourea and sodium D-camphor-β-sulfonate