作者:Ryohei Ikeda、Hozumi Tanaka、Hiroshi Oyabu、Hiroshi Uyama、Shiro Kobayashi
DOI:10.1246/bcsj.74.1067
日期:2001.6
“Artificial urushi” has been developed by laccase-catalyzed curing of new urushiol analogues. The analogues were designed and conveniently synthesized by regioselective acylation of phenol derivatives having a primary alcohol with unsaturated fatty acids using lipase as catalyst. The curing of the catechol derivative having a linolenoyl group proceeded in the presence of acetone powder from Chinese urushi, yielding the crosslinked film (“artificial urushi”) with high hardness and gloss surface, which are comparable with those of natural urushi coating. The analogues obtained from vanillyl alcohol were also cured. FT-IR monitoring of the curing showed that the crosslinking mechanism was similar to that of the natural urushi. The curing of the urushiol analogues in the presence of starch–urea phosphate took place to give the artificial urushi consisting exclusively of synthetic compounds.
通过漆酶催化固化新的尿素类似物,开发出了 "人造尿素"。这些类似物是以脂肪酶为催化剂,通过具有伯醇的苯酚衍生物与不饱和脂肪酸的区域选择性酰化而设计和合成的。具有亚麻酸酰基的儿茶酚衍生物在中国乌金石丙酮粉末的存在下固化,得到的交联薄膜("人造乌金石")具有高硬度和光泽表面,可与天然乌金石涂层相媲美。从香草醇中提取的类似物也得到了固化。对固化过程的傅立叶变换红外光谱监测表明,其交联机理与天然尿素相似。在磷酸淀粉-尿素存在下固化尿素醇类似物,得到了完全由合成化合物组成的人造尿素。