Abietane-type and labdane-type diterpenoids from the cones of Chamaecyparis obtusa |
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| Authors: | Jun-ichi Fukushima Mitsuyoshi Yatagai and Tatsuro Ohira |
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| Institution: | (1) 2-5-2 Akebono, 277-0841 Kashiwa City, Chiba, Japan;(2) Graduate School of Agricultural and Life Sciences, The University of Tokyo, 1-1-1 Yayoi Bunkyo-ku, 113-8657 Tokyo, Japan;(3) Department of Forest Chemistry, Forestry and Forest Product Research Institute, 305-8687 Isrbaraki, Japan |
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| Abstract: | A novel compound, 8(17),12E,14-labdatrien-19-al (trans-communal), was isolated from ethyl acetate extract of young cones of hinoki (Chamaecyparis obtusa Endl.). The chemical structure of the compound was determined mainly with various nuclear magnetic resonance spectral techniques. Its stereochemistry was determined by derivation to a known compound,trans-communol. In addition to this compound, four known compounds — ferruginol, chamaecydin, 12-hydroxy-6,7-seco-abieta-8,l 1,13-triene-6,7-dial, and frans-communic acid — were isolated. All isolated compounds were subjected to an antifeedant bioassay against the pest insectSpodoptera litura. Results of the bioassay showed that chamaecydin and 12-hydroxy-6,7-seco-abieta-8,11,13-triene-6,7-dial had antifeedant activity.Part of this report was presented at 45th Annual Meeting of the Japan Wood Research Society, Tokyo, April 1995 |
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| Keywords: | Chamaecyparis obtusa Cupressaceae Antifeedant activity Spodoptera litura Diterpenoid |
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