Volume 31, Issue 12
Heterocyclic Compounds
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ChemInform Abstract: Direct Conversion to 2-Phenyl-4-quinolones via a 4-Alkoxyflavylium Salt from a Naturally Occurring Flavanone.

Shingo Sato

Shingo Sato

Dep. Mater. Sci. Eng., Fac. Eng., Yamagata Univ., Yonezawa, Yamagata 992, Japan

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Hironobu Kumagai

Hironobu Kumagai

Dep. Mater. Sci. Eng., Fac. Eng., Yamagata Univ., Yonezawa, Yamagata 992, Japan

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Shigeru Matsuba

Shigeru Matsuba

Dep. Mater. Sci. Eng., Fac. Eng., Yamagata Univ., Yonezawa, Yamagata 992, Japan

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Toshihiro Kumazawa

Toshihiro Kumazawa

Dep. Mater. Sci. Eng., Fac. Eng., Yamagata Univ., Yonezawa, Yamagata 992, Japan

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Jun-ichi Onodera

Jun-ichi Onodera

Dep. Mater. Sci. Eng., Fac. Eng., Yamagata Univ., Yonezawa, Yamagata 992, Japan

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Masanobu Suzuki

Masanobu Suzuki

Dep. Mater. Sci. Eng., Fac. Eng., Yamagata Univ., Yonezawa, Yamagata 992, Japan

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First published: 09 June 2010

Abstract

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ChemInform Abstract

A convenient, efficient and versatile method for the direct conversion of flavones (I) into 2-arylquinolones (IV) via the intermediacy of 4-alkoxyflavylium perchlorates (III) is described. Protection of the 5-hydroxy group in starting flavones is crucial.

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