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Correction of a Reported Xanthone Synthesis: The Preparation of a Benzo[c]coumarin

✍ Scribed by Michael H. Benn; Masood Parvez; Nigel B. Perry; Arvi Rauk; John W. van Klink

Publisher
John Wiley and Sons
Year
2010
Tongue
German
Weight
193 KB
Volume
93
Category
Article
ISSN
0018-019X

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✦ Synopsis

Abstract

Reinvestigation of a reported synthesis of 5,8‐dihydroxy‐1,3‐dimethoxyxanthone from the reaction of 3,5‐dimethoxyphenol with 2‐(methoxycarbonyl)‐1,4‐benzoquinone resulted in the identification of the product as the isomer of benzo[c]coumarin, i.e., 7,10‐dihydroxy‐1,3‐dimethoxy‐6__H__‐dibenzo[b,d]pyran‐6‐one, established by X‐ray crystallography. This requires the revision of the structures of the derivatives that were reported.

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