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An unusual chromone formation, and its rearrangement to a coumarin

Majumdar, KC and Choudhury, PK and Nethaji, M (1994) An unusual chromone formation, and its rearrangement to a coumarin. In: Tetrahedron Letters, 35 (32). pp. 5927-5930.

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Official URL: http://dx.doi.org/10.1016/S0040-4039(00)78221-9

Abstract

3-(2'-cyclopentenyl)-4-hydroxy[1]Benzopyran-2-one(2) or its acetate (3) reacts with pyridine hydrotribromide to give the fused furo chromone (4) in 90% yield, which on refluxing in 50% H2SO4 furnishes the fused furo coumarin (5) in 87% yield.

Item Type: Journal Article
Additional Information: Copyright of this article belongs to Elsevier Science.
Department/Centre: Division of Chemical Sciences > Inorganic & Physical Chemistry
Date Deposited: 26 Mar 2011 06:48
Last Modified: 26 Mar 2011 06:48
URI: http://eprints.iisc.ernet.in/id/eprint/36238

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