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Official Journal of the Japan Wood Research Society

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Chemical changes in terpenes of sugi (Cryptomeria japonica) wood during steam drying in kiln at high temperature

Abstract

Sawdusts of sugi (Cryptomeria japonica) wood prepared before and after steam drying at 120°C in a kiln were extracted with n-hexane and ethyl acetate to give n-hexane extracts and ethyl acetate extracts. From gas chromatography-mass spectrometry analysis of the ethyl acetate extracts from woods before and after steam drying, the components of 4-epi-cubebol, cubebol, and 2,7(14),10-bis-abolatrien-1-ol-4-one, which existed in the raw sugi wood, were proved to disappear in the steam-dried wood. These components were also absent in the ethyl acetate extract of the steam-condensed solution of waste steam from the kiln outlet. When these three components were treated with 0.2% (v/v) acetic acid solution at 120°C, δ-cadinene was produced as a major product from both 4-epi-cubebol and cubebol by dehydration and cleavage of the cyclopropane ring, and cryptomerone from 2,7(14),10-bisabolatrien-1-ol-4-one by hydration. The chemical changes of the three components presumably occur during steam drying of the sugi wood.

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Correspondence to Yoh-ichi Matsushita.

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This study was presented in part at the 85th Spring Meeting of the Chemical Society of Japan, Kanagawa, Japan, March 26–29, 2005

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Matsushita, Yi., Sugamoto, K., Miyakubo, K. et al. Chemical changes in terpenes of sugi (Cryptomeria japonica) wood during steam drying in kiln at high temperature. J Wood Sci 54, 476–482 (2008). https://doi.org/10.1007/s10086-008-0980-6

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  • DOI: https://doi.org/10.1007/s10086-008-0980-6

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