| Article ID | Journal | Published Year | Pages | File Type |
|---|---|---|---|---|
| 5278112 | Tetrahedron Letters | 2011 | 4 Pages |
Abstract
Three-component reactions of 4-hydroxycoumarin, aldehydes, and cyclic 1,3-dicarbonyl compounds were prompted by novel sulfonic acid functionalized ionic liquids 1,3-dimethyl-2-oxo-1,3-bis(4-sulfobutyl)imidazolidine-1,3-diium hydrogen sulfate ([DMDBSI]·2HSO4) in water at reflux temperature to provide a novel series of 10,11-dihydrochromeno[4,3-b]chromene-6,8(7H,9H)-dione derivatives for the first time in high yields.
Keywords
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Physical Sciences and Engineering
Chemistry
Organic Chemistry
![A novel sulfonic acid functionalized ionic liquid catalyzed multicomponent synthesis of 10,11-dihydrochromeno[4,3-b]chromene-6,8(7H,9H)-dione derivatives in water](/preview/png/5278112.png "First Page Preview: A novel sulfonic acid functionalized ionic liquid catalyzed multicomponent synthesis of 10,11-dihydrochromeno[4,3-b]chromene-6,8(7H,9H)-dione derivatives in water")
Authors
Zhiwei Chen, Qiang Zhu, Weike Su,