Naphthalene derivatives from Diospyros kaki |
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| Authors: | Yasuyuki Matsushita In-Cheol Jang Takanori Imai Kazuhiko Fukushima Seung-Cheol Lee |
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| Institution: | (1) Department of Molecular and Functional Genomics, Center for Integrated Research in Science, Shimane University, Matsue 690-8504, Japan;(2) Faculty of Life and Environmental Sciences, Shimane University, Matsue 690-8504, Japan;(3) Graduate School of Agricultural and Life Sciences, The University of Tokyo, Tokyo 113-8657, Japan;(4) Faculty of Agriculture, Tottori University, Tottori 680-8533, Japan;(5) Graduate School of Science, Nagoya University, Nagoya 464-8601, Japan; |
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| Abstract: | 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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