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First 13C-NMR Assignments of Betaxanthins

✍ Scribed by Florian C. Stintzing; Florian Kugler; Reinhold Carle; Jürgen Conrad

Publisher
John Wiley and Sons
Year
2006
Tongue
German
Weight
119 KB
Volume
89
Category
Article
ISSN
0018-019X

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✦ Synopsis

Abstract

Due to their inherent liability towards highly acidic conditions previously considered to be a prerequisite for data acquisition, betaxanthin structure dereplication by NMR spectroscopy has been scarcely reported and was, hitherto, exclusively based on ^1^H‐NMR data interpretation. Applying only slightly acidic conditions, we herein report the first ^13^C‐NMR data of two betaxanthins, i.e., indicaxanthin (1), isolated from yellow‐orange cactus pear fruits (Opuntia ficus‐indica [L.] Mill. cv. ‘Gialla’), and of miraxanthin V (2) from yellow Swiss chard petioles (Beta vulgaris L. ssp. cicla [L.] Alef. cv. ‘Bright Lights’), as derived by gHSQC‐ and gHMQC‐NMR experiments and inverse detection.

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