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Cyclodopa glucoside ( = (2 S )‐5‐(β‐ D ‐glocopyranosyloxy)‐6‐hydroxyindoline‐2‐carboxylic acid) and its occurrence in red beet ( beta vulgaris var. rubra L.)
Author(s) -
Wyler Hugo,
Meuer Ursula,
Bauer Jacques,
StravsMombelli Luisa
Publication year - 1984
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.19840670520
Subject(s) - betanin , chemistry , glucoside , betalain , beta (programming language) , chromatography , stereochemistry , organic chemistry , pigment , medicine , alternative medicine , pathology , computer science , programming language
Abstract Cyclodopa glucoside ( = (2 S )‐5‐(β‐ D ‐glucopyranosyloxy)‐6‐hydroxyindoline‐2‐carboxylicacid; 1a ) is prepared from betainin ( 2a ) via a base exchange reaction. Its purification and physical properties are described. The compound is N ‐formylated in dilute HCOOH solution. Cyclodopa glucoside is contained in considerable amount in redbeet juice varying from 0.07 to 1.9 mmol/kg or from 12 to 46% relative to teh content of betanin. Teh occurrence of free cyclodopa glucoside supports its role as intermediate in betanin biosynthesis.