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13C NMR studies of heterocyclic naphtho- and anthraquinones. Deshielding effect on the carbonyl carbon with methyl substitution

✍ Scribed by Cristian Salas; Veronica Armstrong; Claudio López; Ricardo A. Tapia

Publisher
John Wiley and Sons
Year
2008
Tongue
English
Weight
123 KB
Volume
46
Category
Article
ISSN
0749-1581

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✦ Synopsis

Abstract

^13^C chemical shift assignment of several methyl substituted heterocyclic naphtho‐ and anthraquinones, including dihydronaphthofuranquinones, azaanthraquinones, benzopyrroloquinolinediones and benzothiophenoquinolinediones, are described. A deshielding effect due to a methyl group was observed over the neighbouring carbonyl carbon, in every case studied. ^13^C assignments were based on 2D experiments. Copyright © 2007 John Wiley & Sons, Ltd.

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