Dienone-Phenol Rearrangement of (+ )-2,-Demethoxydehydrogriseofulvin into a 4-Methylxanthone Derivative

Taiko Oda, Yuko Yamaguchi, Yoshihiro Sato

研究成果: Article査読

6 被引用数 (Scopus)

抄録

Treatment of (+)-2‘-demethoxydehydrogriseofulvin (2b) with magnesium iodide afforded 5-chloro-2,8-dihydroxy-6-methoxy-4-methylxanthone (3a) via dienone-phenol rearrangement. The structure of 3a was determined by means of a carbon-13 nuclear magnetic resonance (13C-NMR) long-range selective proton decoupling (LSPD) experiment performed on its diacetate 3b. The rearrangement of 2b was also effected with p-toluenesulfonic acid to give 5-chloro-6,8-dimethoxy-2-hydroxy-4-methylxanthone (6a). On the other hand, reaction of (— )-dehydrogriseofulvin (2d) with p-toluenesulfonic acid under more vigorous conditions resulted in racemization, no rearrangement being observed.

本文言語English
ページ(範囲)858-863
ページ数6
ジャーナルChemical and Pharmaceutical Bulletin
34
2
DOI
出版ステータスPublished - 1986 1 1

ASJC Scopus subject areas

  • Chemistry(all)
  • Drug Discovery

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