Conventional one-dimensional NMR methods and two-dimensional shift-correlated NMR experiments (COSY, HMQC, HMBC) were used for 1 H and 13 C chemical shift assignments of two naphthoquinone dimers tectol and tecomaquinone I isolated from Lippia sidoides.
Total assignments of 1H and 13C NMR spectra of isocatalpanol and a derivative of tecomaquinone
✍ Scribed by Allana Kellen L. Santos; Jõao Carlos Assunção; Aluisio M. Fonseca; Otilia D. L. Pessoa; Francisco Jose Q. Monte; Telma L. G. Lemos; Raimundo Braz-Filho
- Publisher
- John Wiley and Sons
- Year
- 2005
- Tongue
- English
- Weight
- 91 KB
- Volume
- 43
- Category
- Article
- ISSN
- 0749-1581
- DOI
- 10.1002/mrc.1582
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✦ Synopsis
Abstract
Isocatalpanol and tecomaquinone I were obtained from roots of Lippia sidoides, a medicinal plant from northeast Brazil. Reduction of tecomaquinone I with NaBH~4~ yielded a new derivative. Structural elucidation was done on the basis of spectral data, mainly by high‐field NMR and electron ionization mass spectrometry. Copyright © 2005 John Wiley & Sons, Ltd.
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