Five new benzannulated steroid spiroketals were synthesized by Pd‐catalyzed spiroketalization of 5α and 5β‐alkynediols derived from stigmasterol and sitosterol. The detailed nuclear magnetic resonance (NMR) and X‐ray characterization of the newly obtained spiroketals are presented. While the obtained compounds showed null or very low cytotoxicity, two of them inhibited more than 60% of the nitrous oxide production in J774A.1 macrophages stimulated with LPS, showing promising properties as anti‐inflammatory agents.
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García‐Santos et al. (2024) studied this question.
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