Journal
JOURNAL OF WOOD SCIENCE
Volume 56, Issue 5, Pages 418-421Publisher
SPRINGER TOKYO
DOI: 10.1007/s10086-010-1115-4
Keywords
Naphthalene derivatives; Diospyros; Ebenaceae; NMR
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Funding
- Grants-in-Aid for Scientific Research [20248018] Funding Source: KAKEN
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A detailed chemical investigation of the extractives of the blackened heartwood of Diospyros kaki was carried out to understand their chemical characteristics and to obtain chemotaxonomic information. Three novel naphthalene derivatives were isolated, i.e., 4-hydroxy-5,6-dimethoxy-2-naphthaldehyde (1), 5,6,8-trimethoxy-3-methyl-1-naphthol (2), and 4,8-dihydroxy-5-methoxy-2-naphthaldehyde (3), in addition to two previously reported 2-naphthaldehydes: 4-hydroxy-5,8-dimethoxy-2-naphthaldehyde (4) and 4-hydroxy-5-methoxy-2-naphthaldehyde (5) Their structures were identified by 1D and 2D nuclear magnetic resonance spectroscopy, as well as by high-resolution mass spectrometry.
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