期刊
TETRAHEDRON
卷 65, 期 36, 页码 7687-7690出版社
PERGAMON-ELSEVIER SCIENCE LTD
DOI: 10.1016/j.tet.2009.06.107
关键词
Chromone-3-carboxamide; Chroman-2,4-diones; 4-Hydroxycoumarin-3-carboxaldehyde; Chromeno[2,3-b]pyridine
4-Hydroxycoumarin-3-carboxaldehyde (5) was obtained from chromone-3-carboxaldehyde (1) via chromone-3-carboxamide (2) and 3-aminomethylene-2H-chroman-2,4-dione (3). 3-Alkylaminomethylenechroman-2,4-diones (7,8) were obtained from the reaction of primary aliphatic amines with chromone-3-carboxamide (2). Treatment of chromone-3-carboxamide with sodium methoxide gives 3-(2-hydroxybenzoyl)-2H-chromeno[2,3-b]pyridine-2,5(1H)-dione (9). (C) 2009 Elsevier Ltd. All rights reserved.
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