Article ID | Journal | Published Year | Pages | File Type |
---|---|---|---|---|
5226625 | Tetrahedron | 2006 | 10 Pages |
Abstract
Using their amide (and pyrrole) groups, dipyrrinones act as hydrogen bonding receptors for carboxylic acids, as found in a large number of 10-oxo-semirubins (1-6). The latter can be synthesized readily by Friedel-Crafts coupling of 9-H dipyrrinones with half-ester acid chlorides or diacid dichlorides of α,Ï-dicarboxylic acids, ranging from C2 to C10. With Ï-oxo-alkanoic acid chains of C5 or â¥C5, intramolecular hydrogen bonding is observed. With acid chains Graphical abstractA series of dipyrrinones (1-6) with varying lengths of Ï-oxo-alkanoic acid chains attached to C(9) display hydrogen bonding between the CO2H and dipyrrinone lactam and pyrrole.Download full-size image
Related Topics
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Authors
Nicholas T. Salzameda, Michael T. Huggins, David A. Lightner,