Volume 58, Issue 7 pp. 2144-2148
Communication

Palladium/Norbornene-Catalyzed Indenone Synthesis from Simple Aryl Iodides: Concise Syntheses of Pauciflorol F and Acredinone A

Feipeng Liu

Feipeng Liu

Department of Chemistry, University of Chicago, Chicago, IL, 60637 USA

Department of Applied Chemistry, China Agricultural University, Beijing, 100193 China

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Zhe Dong

Zhe Dong

Department of Chemistry, University of Chicago, Chicago, IL, 60637 USA

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Jianchun Wang

Corresponding Author

Jianchun Wang

Department of Chemistry, University of Chicago, Chicago, IL, 60637 USA

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Prof. Dr. Guangbin Dong

Corresponding Author

Prof. Dr. Guangbin Dong

Department of Chemistry, University of Chicago, Chicago, IL, 60637 USA

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First published: 02 January 2019
Citations: 85

Graphical Abstract

A straightforward method for indenone synthesis was achieved by Pd/NBE-catalyzed annulation between simple aryl iodides and unsaturated carboxylic acid anhydrides. This method enabled streamlined syntheses of pauciflorol F and acredinone A.

Abstract

To show the synthetic utility of palladium/norbornene (Pd/NBE) cooperative catalysis, here we report concise syntheses of indenone-based natural products, pauciflorol F and acredinone A, which are enabled by direct annulation between aryl iodides and unsaturated carboxylic acid anhydrides. Compared to the previous indenone-preparation approaches, this method allows simple aryl iodides to be used as substrates with complete control of the regioselectivity. The total synthesis of acredinone A features two different Pd/NBE-catalyzed ortho acylation reactions for constructing penta-substituted arene cores, including the development of a new ortho acylation/ipso borylation.

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