FIN-4035 1 JyvHskyli, Four macrolides (ranging from dimer to pentamer) of lithocholic (3a-hydroxy-58cholan-24-oic) acid were identified by electron impact and fast atom bombardment mass spectrometry and 13C N M R spectrometry. The 13C NMR chemical shift assignments are based on comparison with relat
Substituted methyl 5β-cholan-24-oates II. 13C NMR spectral assignment
✍ Scribed by Kari Lappalainen; Erkki Kolehmainen; Mari Kaartinen; Reijo Kauppinen; Raimo Seppälä; Virpi Vatanen
- Publisher
- John Wiley and Sons
- Year
- 1994
- Tongue
- English
- Weight
- 266 KB
- Volume
- 32
- Category
- Article
- ISSN
- 0749-1581
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✦ Synopsis
Abstract
The ^13^C NMR spectra were recorded and assigned for nine derivatives of methyl 5β‐cholan‐24‐oates (esters of bile acids) including hydroxy, oxo and/or acetyloxy groups. Assignments were based on the empirical substituent‐induced chemical shifts (SCS), spectral comparison with compounds of similar structure, distortionless enhancement by polarization transfer (DEPT) and proton coupled ^13^C NMR measurements.
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## Abstract Detailed assignments of ^1^H and ^13^C NMR spectral data for 13 β‐substituted cycloenones are reported. The assignments are based on 1D ^1^H and ^13^C NMR and on 2D shift‐correlated (^1^H,^13^C‐HMQC and HMBC), __J__‐resolved and COSY and double irradiation experiments. Copyright © 2005
3a,3@a-Bis(arylcarboxy)-5b-cholan-24-oic acid ethane-1, 2-diol diesters (1È3) were synthesized by the reaction of an aroyl chloride (aroyl \ 2,6-dichlorobenzoyl, 2-naphthoyl and 1-pyrenoyl) with lithocholic acid (3a-hydroxy-5b-cholan-24-oic acid) ethane-1,2-diol diester. The 13C NMR chemical shift a