## Abstract A choice between structures I and III for betanidin is now possible in favour of I on the basis of the formation of a well‐characterized di‐O‐acetylderivative (II). The instability of betanidin and its ready transformation into other products at elevated pH's are shown to be due to its
Zur Konstitution des Randenfarbstoffes Betanin. 2. (vorläufige) Mitteilung
✍ Scribed by H. Wyler; G. Vincenti; M. Mercier; G. Sassu; André S. Dreiding
- Publisher
- John Wiley and Sons
- Year
- 1959
- Tongue
- German
- Weight
- 192 KB
- Volume
- 42
- Category
- Article
- ISSN
- 0018-019X
No coin nor oath required. For personal study only.
✦ Synopsis
Abstract
An empirical formula (C~24~H~28–30~O~13~N~2~) and certain structural features of betanin are reported.
In the beet betanin is accompanied by three related violet compounds.
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## Abstract By degrading betanidin with alkali under exclusion of oxygen it was possible to demonstrate the formation of 4‐methylpyridine‐2, 6‐dicarboxylic acid (II), 2, 3‐dihydro‐5, 6‐dihydroxyindole‐2‐carboxylic acid (IV) and formic acid. Compounds II and IV were also found after a treatment with
## Abstract __Betanin__, the violet‐red pigment of the beet, and its aglucone, __betanidin__, were converted by mild methods to several derivatives of a new structure, called __neobetanidin__. On the basis of elementary analyses, transformations, color changes with acid, mass‐spectrographic evidenc
## Abstract Two aglucones of betanin, called betanidin and __iso__betanidin, are described. Empirical formulas (C~19~H~18–20~O~8~N~2~) and certain structural features are deduced for them. Degradations of the aglucones are shown to yield indole and pyridine compounds.
## Abstract Methylierung des einheitlichen, kristallisierten Norcurarin‐N~(b)~‐monomethochlorids mit Methyljodid‐[^14^C] liefert ein C‐Curarin, in welchem nur eine der an beiden N~(b)~‐Atomen stehenden Methylgruppen durch ^14^C markiert ist. Bei der Hydrolyse dieser Verbindung wird C‐Fluorocurarin