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Ringschlüsse an Chinonylmethanfarbstoffen und analogen Merocyaninen. 2. Mitteilung. Dihydronaphthophenazinone; Beeinflussung der Löslichkeitseigenschaften durch Substitution, Isolierung und Charakterisierung einer Zwischenstufe des Ringschlusses
Author(s) -
Schelz Dieter,
Priester Martin
Publication year - 1975
Publication title -
helvetica chimica acta
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.74
H-Index - 82
eISSN - 1522-2675
pISSN - 0018-019X
DOI - 10.1002/hlca.19750580836
Subject(s) - chemistry , solubility , substitution (logic) , stereochemistry , substitution reaction , medicinal chemistry , organic chemistry , computer science , programming language
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.