Total Synthesis of (–)-Anaferine: A Further Ramification in a Diversity-Oriented Approach

The piperidine ring is a widespread motif in several natural bioactive alkaloids of both vegetal and marine origin. In the last years, a diversity-oriented synthetic (DOS) approach, aimed at the generation of a library of piperidine-based derivatives, was developed in our research group, employing c...

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Bibliographic Details
Main Authors: Elisa Bonandi, Giada Tedesco, Dario Perdicchia, Daniele Passarella
Format: Article
Language:English
Published: MDPI AG 2020-02-01
Series:Molecules
Subjects:
Online Access:https://www.mdpi.com/1420-3049/25/5/1057
Description
Summary:The piperidine ring is a widespread motif in several natural bioactive alkaloids of both vegetal and marine origin. In the last years, a diversity-oriented synthetic (DOS) approach, aimed at the generation of a library of piperidine-based derivatives, was developed in our research group, employing commercially available 2-piperidine ethanol as a versatile precursor. Here, we report the exploration of another ramification of our DOS approach, that led us to the stereoselective total synthesis of (&#8722;)-anaferine, a bis-piperidine alkaloid present in <i>Withania somnifera</i> extract. This natural product was obtained in 9% overall yield over 13 steps, starting from a key homoallylic alcohol previously synthesised in our laboratory. Therefore, the collection of piperidine-derivatives accessible from 2-piperidine ethanol was enriched with a new, diverse scaffold.
ISSN:1420-3049