杂环萘醌和蒽醌的13C核磁共振研究。甲基取代对羰基碳的去屏蔽效应。
13C NMR studies of heterocyclic naphtho- and anthraquinones. Deshielding effect on the carbonyl carbon with methyl substitution.
作者信息
Salas Cristian, Armstrong Veronica, López Claudio, Tapia Ricardo A
机构信息
Facultad de Química, Pontificia Universidad Católica de Chile, Casilla 306, Santiago22, Chile.
出版信息
Magn Reson Chem. 2008 Feb;46(2):191-4. doi: 10.1002/mrc.2156.
DOI:10.1002/mrc.2156
PMID:18095264
Abstract
13C 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. 13C assignments were based on 2D experiments.
摘要
描述了几种甲基取代的杂环萘醌和蒽醌的¹³C化学位移归属，包括二氢萘并呋喃醌、氮杂蒽醌、苯并吡咯并喹啉二酮和苯并噻吩并喹啉二酮。在所研究的每种情况下，均观察到甲基对相邻羰基碳的去屏蔽效应。¹³C归属基于二维实验。
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