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The Chemical Constituents Related to the Color of Sugi Heartwood and the Color Conditioning of the Heartwood by Chemical Modification.

与杉心材颜色相关的化学成分以及化学改性对心材颜色的调节。

基本信息

批准号：
62560170
负责人：
KAI Yuji
金额：
$ 1.28万
依托单位：
Shizuoka University
依托单位国家：
日本
项目类别：
Grant-in-Aid for General Scientific Research (C)
财政年份：
1987
资助国家：
日本
起止时间：
1987 至 1988
项目状态：
已结题

项目摘要

1. Methanol-Soloble coloring materials of sugi heartwood (2types:reddish colored heartwood and dark colored heartwood) were methylated or ethylated followed by oxidation with potassium permanganate in alkaline media. The results of GLC analysis of the oxidation products are summarized as follows: (1) Two types of the coloring materials were composed of the six partial structures: p-hydroxyphenyl group, 3,4-dihydroxyphenyl group, guaiacyl group, 3,4-dimethoxyphenyl group, 3-methoxy-4,5-dihydroxyphenyl group and guaiacyl group condensed at 6-position. (2) The dark colored heartwood contained 3-methoxy-4,5-dihydroxylhenyl group more than that of reddish colored heartwood. The existence of this partial structure in sugi heartwood was found for the first time in the present investigation. (3) The content of methoxyl group in the coloring material of the dark colored heartwood was higher than that of the reddish colored heartwood.2. Acetyl derivatives of agatharesinol and sequirin C were isolated from the extractives of acetylated dark colored heartwood, and identified by NMR and IR spectra. In the extractives, the substance possible to be polyphenol having 3-methoxy-4,5-dihydroxyphenyl group was detected by TLC, but not to be able to isolated.3. Color improvement of dark colored heartwood was conducted with various chemical treatnent. The treatment with ozone in dichloromethane: methanol (1:1)medium gave the most effective color improvement to the dark colored heartwood. Methylation of the wood diazomethane resulted in remarkable bleaching effect.

1.以杉心材（红心材和深色心材两种类型）为原料，采用甲醇-Soloble染色法，在碱性条件下，对染色材料进行甲基化或乙基化处理，然后用高锰酸钾氧化。（1）氧化产物的GLC分析结果表明：（1）两类染料均由6个部分结构组成：对羟基苯基、3，4-二羟基苯基、愈创木基、3，4-二甲氧基苯基、3-甲氧基-4，5-二羟基苯基和6位缩合的愈创木基。(2)深色心材比红色心材含有更多的3-甲氧基-4，5-二羟基苯基。这一部分结构的存在是首次在杉心材中发现。(3)深色心材着色物质中甲氧基含量高于红色心材.从乙酰化深色心材提取物中分离得到了沉香脂素和红杉苷C的乙酰基衍生物，并通过核磁共振和红外光谱进行了结构鉴定。在提取物中，用薄层色谱法检测到可能是具有3-甲氧基-4，5-二羟基苯基的多酚类物质，但未能分离出.采用不同的化学处理方法对深色心材进行颜色改良。在二氯甲烷：甲醇（1：1）培养基中用臭氧处理对深色心材的颜色改善最有效。木材重氮甲烷的甲基化具有显著的漂白效果。