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Assignment of the 1H and 13C NMR spectra of the C21 steroids 12-β-O-acetyltenacigenin A and tenacigenin A by two-dimensional NMR techniques and computer modeling

✍ Scribed by Si-Qi Luo; Long-Ze Lin; Geoffrey A. Cordell; Liang Xue; Michael E. Johnson

Publisher
John Wiley and Sons
Year
1993
Tongue
English
Weight
592 KB
Volume
31
Category
Article
ISSN
0749-1581

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✦ Synopsis

Abstract

Stereochemical assignments of the C~21~ steroids 12‐β‐O‐acetyltenacigenin A and tenacigenin A were performed by use of two‐dimensional phase‐sensitive COSY, ROESY, ^1^H and ^13^C shift correlation spectroscopy (HETCOR and FLOCK), and ambiguous assignments were resolved through molecular modeling comparisons. This combination of techniques is applicable for the assignment of the highly overlapped ^1^H signals of these steroids.

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