Chemical and Pharmaceutical Bulletin
Online ISSN : 1347-5223
Print ISSN : 0009-2363
ISSN-L : 0009-2363
Usnic Acid. III. Anhydromethyldihydrousnic Acid.
Kotaro TakahashiShuichi Miyashita
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1963 Volume 11 Issue 2 Pages 209-213

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Abstract
Anhydromethyldihydrousnic acid, acetylation product of methyldihydrousnic acid, was proved to have structure (II). It was assumed that the reaction mechanism was not a simple acetylation reaction but it involved the fission and reformation of a-C-O-C- bond in the furan ring and the Dienone-Phenol rearrangement.
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© The Pharmaceutical Society of Japan
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