A novel phenolic spiro derivative, Yuccaone A, from Yucca schidigera bark

✍ Scribed by Sonia Piacente; Giuseppe Bifulco; Cosimo Pizza; Anna Stochmal; Wieslaw Oleszek

• Publisher: Elsevier Science
• Year: 2002
• Tongue: French
• Weight: 120 KB
• Volume: 43
• Category: Article
• ISSN: 0040-4039
• DOI: 10.1016/s0040-4039(02)02244-x

✦ Synopsis

A new, very unusual, phenolic constituent based on a spiro benzopyran-4-cyclopentan-3-one system has been isolated from Yucca schidigera bark and its structure has been established by ESI-MS and NMR experiments. In particular the relative configuration of the molecule has been defined combining the NMR data with ab initio conformational studies; the minimum energy conformers for the eight possible diastereomers were compared to the NMR experimental data in order to assess the diastereomer fitting of all the J coupling values and the dipolar values.