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Carbon-13 NMR spectra of bile acid derivatives. Part III. Unsaturated 5β-cholanoic acids

✍ Scribed by Takashi Iida; Junichi Goto; Toshio Nambara

Publisher: John Wiley and Sons
Year: 1993
Tongue: English
Weight: 264 KB
Volume: 31
Category: Article
ISSN: 0749-1581
DOI: 10.1002/mrc.1260310423

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✦ Synopsis

Abstract

^13^C NMR signals were assigned for 18 methyl 5β‐cholenoates with a double bond in ring A, B, C or D (Δ^2^, Δ^3^, Δ^5^, Δ^6^, Δ^7^, Δ^8(14)^, Δ^9(11)^, Δ^11^ or Δ^14^). The double bond substituent effects on the ^13^C NMR chemical shifts of the parent 5β‐cholanoates were clarified.

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✍ U. Wrzeciono; L. Zaprutko; J. Budzianowski; H. Wojtowicz; D. Dubowska 📂 Article 📅 1987 🏛 John Wiley and Sons 🌐 English ⚖ 313 KB

The 13C NMR spectra of five pairs of 18p-and 18r~-ll-oxooleanolic acid derivatives have been assigned. The chemical shifts of C-12, C-13, C-17, C-18 and C-28 are of diagnostic value for the determination of the DIE junction stereochemistry. KEY WORDS "C NMR 18p-11 -oxooleanolic acid derivatives 18a-