Synthesis 2003(5): 0673-0676
DOI: 10.1055/s-2003-38066
PAPER
© Georg Thieme Verlag Stuttgart ˙ New York

Synthesis of 1H-2-Benzopyran-5,8-dione Derivatives from 2-(1-Hydroxy­alkyl)-1,4-benzoquinones and Enamines

Kazuhiro Kobayashi*, Kosaku Nomura, Toshikazu Ogata, Miyuki Tanmatsu, Osamu Morikawa, Hisatoshi Konishi
Department of Materials Science, Faculty of Engineering, Tottori University, Koyama-minami, Tottori 680-8552, Japan
Fax: +81(857)315263; e-Mail: kkoba@chem.tottori-u.ac.jp;
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Publication History

Received 28 November 2002
Publication Date:
21 March 2003 (online)

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Abstract

An efficient synthesis of the title benzopyranodione derivatives based on a Michael addition/cyclization sequence between 2-(1-hydroxyalkyl)-1,4-benzoquinones and enamines (or an imine) is described.