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. 2012 Jun 22;75(6):1125-9.
doi: 10.1021/np300141t. Epub 2012 Jun 12.

Structural reassignment of a marine metabolite from a binaphthalenetetrol to a tetrabrominated diphenyl ether

Erin E Podlesny  1 , Marisa C Kozlowski
Affiliations

Structural reassignment of a marine metabolite from a binaphthalenetetrol to a tetrabrominated diphenyl ether

Erin E Podlesny et al. J Nat Prod. .

Abstract

The structure of a reported natural product isolate has been revised from (S)-2,2'-dimethoxy-[1,1'-binaphthalene]-5,5',6,6'-tetraol to a known tetrabrominated diphenyl ether. After total synthesis of the reported binaphthalenetetrol was accomplished via a key reduction of a binaphtho-ortho-quinone, comparison of the physical properties and NMR spectroscopic data of the synthetic material indicated that the structure of the natural product isolate was incorrect. Evaluation of the authentic natural product suggested the structure is a tetrabrominated diphenyl ether, likely 3,5-dibromo-2-(3,5-dibromo-2-methoxyphenoxy)phenol.

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Figures

Figure 1
Figure 1
Crystal structure of binaphtho-ortho-quinone rac-2
Figure 2
Figure 2
Possible structures of the natural product isolate.
Scheme 1
Scheme 1
Retrosynthetic Analysis
Scheme 2
Scheme 2
Synthesis of Reported Natural Product (S)-1 Abbreviations: IBX, o-iodoxybenzoic acid
See this image and copyright information in PMC

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