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2005
Fused pyridine derivatives
R 0450
Oxidation of 4,7-Phenanthroline Derivatives. — Oxidation of phenantroline (I) with
permanganate in alkaline medium yields the diazafluorenone (II) as the only
16- 134 potassium
oxidation product instead of the expected ring-opened dicarboxylic acid. Oxidation
of phenanthroline derivatives incorporating a dihydropyridine ring, cf. (V) and (IX),
gives rise to formation of new compounds of the 4,7-phenanthroline series possessing
an extended conjugation system, cf. (VI) and (X). These compounds are of interest as
luminescent and light-sensitive materials. — (GUSAK, K. N.; KOZLOV, N. G.;
TERESHKO, A. B.; Russ. J. Org. Chem. 40 (2004) 9, 1322-1328; Inst. Phys. Org.
Chem., Natl. Acad. Sci. Belarus, Minsk 220072, Belarus; Eng.) —
H. Hoennerscheid
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