Chemical Constituents of Some Endemic Conifers in Taiwan
Resource
Journal of the Chinese Chemical Society 39 (6): 647-654
Date Issued
1992
Author(s)
鄭玉瑕
Abstract
Abstract Chemical constituents of conifers of families of Cupressaceae, Pinaceae and Taxodiaceae, of which endemic species such as Chamaecyparis taiwanensis, Chamaecyparis formosensis, Calocedrus formosana, Pinus armandii, Tsuga chinensis and Taiwania cryptomerioides are emphasized. The chemical constituents mainly include terpenes, lignans and flavones. Methods and significance of this research are discussed. Extraction, crystallization and chromatography are general methods for separation of plant constituents. Chemical and spectral methods including IR, MS and NMR are frequently used for structural determination along with X‐ray crystallography and circular dichroic spectroscopy to establish absolute configuration in appropriate cases. Finding hinokitiol from Taiwan cypress has initiated the emerging study of troponoid chemistry and nonbenzenoid aromatic compounds. A norsesquiterpene chamaecynone and a mixture of sesquiterpenes T‐cadinol and T‐muurolol exhibit respectively termiticide and antifidant activities. The flavonoid and stilbene constituents are analyzed to support the chemotaxonomy of armand pine and Taiwan white pine. A study of the constituents of armand pine indicates that 30 ‐nor‐ 3 β‐ methoxyserrat‐14‐en‐21‐one is biogenetically derived from 3β‐methoxyserrat‐14‐en‐21‐one by an oxidative degradation via intermediacy of the 30‐alcohol and the 30‐aldehyde.
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journal article
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