HETEROCYCLES
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Note | Regular issue | Vol 63, No. 7, 2004, pp.1679-1683
Published online, 1st June, 2004■ Reactions of 5-Hydroxymethyl-1H-indole-4,7-dione with Enamines for the First Construction of 1H,5H-Pyrano[3,4-f]indole-4,9-dione Derivatives
Published online, 1st June, 2004
DOI: 10.3987/COM-04-10102
■ Reactions of 5-Hydroxymethyl-1H-indole-4,7-dione with Enamines for the First Construction of 1H,5H-Pyrano[3,4-f]indole-4,9-dione Derivatives
Kazuhiro Kobayashi,* Hideo Tanaka, Koujirou Tanaka, Kazutaka Hayashi, Osamu Morikawa, and Hisatoshi Konishi
*Department of Materials Science, Faculty of Engineering, Tottori University, 4-101 Koyama-minami, Tottori 680-8552, Japan
Abstract
5-Hydroxymethyl-1-methyl-2,3-diphenyl-1H-indole-4,7-dione (4) was synthesized and the tandem Michael addition/cyclization sequence between this indolequinone and enamines has been used to construct title pyranoindolequinone derivatives (6), (7), and (9).
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