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Structure elucidation of the oligosaccharide calonyctin A by the concerted use of 1D and 2D NMR techniques

✍ Scribed by Guy Serratrice; Raphaël Pastor; You-Chuan Hu

Publisher
John Wiley and Sons
Year
1991
Tongue
English
Weight
543 KB
Volume
29
Category
Article
ISSN
0749-1581

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✦ Synopsis

Abstract

The chemical structure of a plant growth substance, calonyctin A, was determined by NMR spectroscopy. The ^13^C and ^1^H spectral assignments were obtained using a combination of DEPT, heteronuclear chemical shift correlation, ^1^H–^1^H COSY, ^1^H–^1^H NOESY and inverse long‐range ^1^H–^13^C correlation. Calonyctin A was found to be a mixture of two homologous glycosides, each containing four rhamnoses and two aglycones. The configuration of the rhamnoses and the structural linkage between the six molecular fragments are reported.

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