Asymmetric Total Synthesis of Piperidine Alkaloids

The construction of piperidine alkaloids through asymmetric total synthesis represents a pivotal endeavour in modern organic chemistry, driven by the prevalence of the piperidine motif in bioactive natural products and pharmaceuticals. Achieving precise control over multiple stereocentres within a six-membered nitrogen heterocycle demands the integration of chiral catalysts, auxiliary-mediated strategies and cascade transformations. Recent advances have focused on enhancing step economy and overall yield by deploying cascade cyclisations, phosphite-driven cyclodehydrations and iterative rearrangements. Diversity-oriented synthesis has enabled the rapid assembly of libraries of piperidine derivatives, while conformationally induced diastereocontrol has been exploited to forge complex macrocyclic frameworks. These methodological refinements not only streamline access to neuroactive agents, analgesics and anticancer leads but also deepen mechanistic understanding of stereochemical induction in nitrogen heterocycle assembly.

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Asymmetric Total Synthesis of Piperidine Alkaloids publication trend

The graph below shows the total number of articles in asymmetric total synthesis of piperidine alkaloids across all publications each year (not limited to Nature Index journals).

Technical terms

Asymmetric synthesis: Construction of a molecule with defined three-dimensional configuration by favouring one enantiomer or diastereomer through chiral catalysts or auxiliaries.

Piperidine alkaloid: A naturally occurring compound characterised by a six-membered nitrogen heterocycle, often exhibiting significant biological activity.

Diastereoselectivity: Preferential formation of one diastereomer over another in a chemical reaction.

Diversity-oriented synthesis: A strategy aimed at generating structurally diverse compound libraries from common precursors through divergent reaction pathways.

Aza-Claisen rearrangement: A [3,3]-sigmatropic rearrangement involving nitrogen-containing substrates to establish new carbon–nitrogen bonds with stereochemical control.

References

1. Total Synthesis of (–)-Anaferine: A Further Ramification in a Diversity-Oriented Approach. Molecules (2020).
2. Concise, stereodivergent and highly stereoselective synthesis of cis- and trans-2-substituted 3-hydroxypiperidines – development of a phosphite-driven cyclodehydration. Beilstein Journal of Organic Chemistry (2014).
3. Asymmetric Synthesis of (−)-6-Desmethyl-Fluvirucinine A1 via Conformationally-Controlled Diastereoselective Lactam-Ring Expansions. Molecules (2018).