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Structural Elucidation of Isomeric Pyranoflavones by 2D-Noesy

 

作者: A. Banerji,   D.L. Luthria,  

 

期刊: Spectroscopy Letters  （Taylor Available online 1991）
卷期: Volume 24, issue 3  

页码: 471-483

 

ISSN:0038-7010

 

年代: 1991

 

DOI:10.1080/00387019108020670

 

出版商: Taylor & Francis Group

 

关键词: 2D-NOESY;Differentiation of isomeric pyranoflavones;carpachromene;atalantoflavone;racemoflavone

 

数据来源: Taylor

 

摘要:

Unequivocal assignments of the uncoupled protons at H-3 and H-6/H-8 of pyranoflavones by 2D-NOESY experiments have made it possible to distinguish linear and angular isomers. This study also suggests that the linear structure (carpachromene,1) assigned to a pyranoflavone isolated fromAtalantia ceylanicashould be revised to angular form (atalantoflavone,4). 2D-NOESY is also useful for differentiating 3′4′- and 2′4′- disubstituted B-ring flavones.

 

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