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Complete assignment of the 13C NMR spectra of the ring forms of digitoxose by DEPT spectrum editing and two-dimensional proton chemical shift correlation spectroscopy

✍ Scribed by Bruce Coxon

Publisher: John Wiley and Sons
Year: 1986
Tongue: English
Weight: 531 KB
Volume: 24
Category: Article
ISSN: 0749-1581
DOI: 10.1002/mrc.1260241115

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✦ Synopsis

The =C chemical shifts of the four isomeric ring forms of D-digitoxose in dimethyl sulfoxide-d, solution have been assigned completely by DEPT 13C NMR spectrum editing and two-dimensional carbon-proton chemical shift correlation spectroscopy. The =C chemical shifts are discussed in terms of their dependence on ring sue and on anomeric configuration. The equilibrated mixture of four ring forms of n-digitoxose in dimethyl sulfoldde-d, solution has been analysed quantitatively by =C NMR spectroscopy, and the results compared with those obtained previously by ' H NMR.

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