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13C NMR Spectral Identification of Four Cyclolithocholates (3α–Hydroxy–5β–cholan–24–oate Macrolides)

✍ Scribed by K. Lappalainen; E. Kolehmainen; J. Kotoneva

Publisher: John Wiley and Sons
Year: 1996
Tongue: English
Weight: 167 KB
Volume: 34
Category: Article
ISSN: 0749-1581
DOI: 10.1002/(sici)1097-458x(199604)34:4<316::aid-omr857>3.0.co;2-z

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✦ Synopsis

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 related monomeric species and DEPT experiments.

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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