Synthesis of 1,3-Diphenyl-2,8-dihydrodibenz[e,h]-azulene-2,8-dione

✍ Scribed by Prof. Dr. W. Ried; Dipl.-Chem. J. Ehret

• Publisher: John Wiley and Sons
• Year: 1968
• Tongue: English
• Weight: 196 KB
• Volume: 7
• Category: Article
• ISSN: 0044-8249
• DOI: 10.1002/anie.196803772

✦ Synopsis

Solutions of (4j in organic solvents display an intensive blue fluorescence and in aqueous mineral acids a blue-green fluorescence. In the N M R spectrum (CDC13) a singlet occurs at T = 0.87, which is ascribed to the protons H-1 and H-3 (the neighboring protons to the ring nitrogen); the remaining protons show a characteristic split multiplet with main signals at T = 2.05, 2.18, 2.38, and 2.50. In trifluoroacetic acid ( 4 ) is protonated and H-1 and H-3 give rise to a doublet, J = 6 Hz, atT = 0.53. The multiplet of the remaining ring protons occurs well downfield at