Volume 134, Issue 46 e202209987
Forschungsartikel

Lithium Enolate with a Lithium-Alkyne Interaction in the Enantioselective Construction of Quaternary Carbon Centers: Concise Synthesis of (+)-Goniomitine

Yang Li

Yang Li

Department of Chemistry and Biochemistry, University of California, Santa Barbara, Santa Barbara, CA 93106 USA

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Elena Paola

Elena Paola

Department of Chemistry and Biochemistry, University of California, Santa Barbara, Santa Barbara, CA 93106 USA

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Zongheng Wang

Zongheng Wang

Department of Chemistry and Biochemistry, University of California, Santa Barbara, Santa Barbara, CA 93106 USA

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Prof. Dr. Gabriel Menard

Prof. Dr. Gabriel Menard

Department of Chemistry and Biochemistry, University of California, Santa Barbara, Santa Barbara, CA 93106 USA

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Prof. Dr. Armen Zakarian

Corresponding Author

Prof. Dr. Armen Zakarian

Department of Chemistry and Biochemistry, University of California, Santa Barbara, Santa Barbara, CA 93106 USA

Center for Integrative Biology, Faculty of Sciences, Geroscience Center for Brain Health and Metabolism, Universidad Mayor, Santiago, Chile

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First published: 17 October 2022
Citations: 3

Abstract

We report a method for direct enantioselective alkylation of 3-alkynoic and 2,3-alkendioic acids that form quaternary stereogenic centers, and application of this method to the total enantioselective synthesis of a complex alkaloid (+)-goniomitine. The methods were effective in the alkylation of both 3-alkynoic acids, 2,3-alkendioic acids substrates with a broad range of heterocyclic and functionalized alkyl group substituents. Accompanying crystallographic studies provide mechanistic insight into the structure of well-defined chiral aggregates, highlighting cation-π interactions between lithium and alkyne groups.

Conflict of interest

The authors declare no conflict of interest.

Data Availability Statement

The data that support the findings of this study are available in the supplementary material of this article.

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