Abstract
AbstractSix steroids with inverted stereochemistry at C‐13 (13‐epi) were studied. Measurement of vicinal proton–proton couplings was facilitated by a 1D TOCSY experiment, which provided efficient deconvolution of the ring D protons from other signals. A simple semi‐quantitative analysis of the ring D couplings was found to be sufficient to determine the conformation of ring D. Examples of 13α, 14β half‐chair, 17β envelope and 16β envelope conformations were found. Copyright © 2001 John Wiley & Sons, Ltd.
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