Synthesis 2018; 50(06): 1238-1245
DOI: 10.1055/s-0036-1591747
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© Georg Thieme Verlag Stuttgart · New York

SYNTHESIS–SYNLETT Lecture: Toward the Asymmetric Synthesis of Tetrapetalone A: Preparation of an Enantioenriched Indane Intermediate and Strategy for Endgame Glycosylation

Peter N. Carlsen
Department of Chemistry, University of Rochester, Rochester, New York 14627-0216, USA   Email: frontier@chem.rochester.edu
,
Eric G. Stoutenburg
Department of Chemistry, University of Rochester, Rochester, New York 14627-0216, USA   Email: frontier@chem.rochester.edu
,
Alison J. Frontier*
Department of Chemistry, University of Rochester, Rochester, New York 14627-0216, USA   Email: frontier@chem.rochester.edu
› Author Affiliations
We thank the NIH (NIGMS R01 GM079364, supporting P.C.) and NSF (CHE-1565813, supporting E.S.) for funding this work.
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Publication History

Received: 13 October 2017

Accepted after revision: 08 December 2017

Publication Date:
05 January 2018 (online)


Abstract

A chiral auxiliary is employed to obtain, via Nazarov cyclization, a synthetic intermediate crucial to our previously reported synthesis of the tetrapetalone A core. This indane derivative, corresponding to the A and B rings of the tetrapetalone natural product skeleton, is then used to test an endgame strategy for installation of the β-rhodinosyl group on ring B. A palladium-catalyzed decarboxylative coupling is described that effects the exclusive formation of the desired β-glycosidic linkage, and the target rhodinose moiety can be obtained via hydrogenation.

Supporting Information