Ringschlüsse an Chinonylmethanfarbstoffen und analogen Merocyaninen. 2. Mitteilung. Dihydronaphthophenazinone; Beeinflussung der Löslichkeitseigenschaften durch Substitution, Isolierung und Charakterisierung einer Zwischenstufe des Ringschlusses
✍ Scribed by Dieter Schelz; Martin Priester
- Publisher
- John Wiley and Sons
- Year
- 1975
- Tongue
- German
- Weight
- 1019 KB
- Volume
- 58
- Category
- Article
- ISSN
- 0018-019X
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✦ Synopsis
Cyclization Reactions of Quinonylmethane Dyes and Analogous Merocyanines. 2. Communication: Dihydro‐oxo‐naphto‐phenazines. Correlation of Solubility and Substitution. Isolation and Characterization of an Intermediate Compound
An intermediate compound of the cyclization reaction of 2‐chloro‐3‐(1‐cyclohexyl‐3‐methyl‐1,2‐dihydroquinoxalin‐2‐ylidenmethyl)‐naphthoquinone was isolated and characterized by spectroscopic methods. 6‐Chloro‐8‐cyclohexyl‐5,8‐dihydronaphtho[1,2‐b]phenazinone was obtained as the final product of this reaction. Several more dihydronaphtho[1,2‐b]phenazinone dyes were synthesized. The relationship of substitution and solubility of the dyes is discussed. The visible and ^1^H‐NMR. and some mass spectra of the dyes are given.