Total Synthesis of a Dimeric Thymol Derivative Isolated from <i>Arnica sachalinensis</i>
作者:Irene De Silvestro、Samuel L. Drew、Gary S. Nichol、Fernanda Duarte、Andrew L. Lawrence
DOI:10.1002/anie.201701481
日期:2017.6.6
The total synthesis of a dimeric thymol derivative (thymarnicol) isolated from Arnica sachalinensis was accomplished in 6 steps. A key biomimetic Diels–Alder dimerization was found to occur at ambient temperature and the final oxidative cyclization occurs when the substrate is exposed to air and visible light. These results indicate that this natural product is likely the result of spontaneous (non‐enzyme‐mediated)
从沙棘木中分离出的二聚百里香酚衍生物(thymarnicol)的总合成过程需要6个步骤。发现一个关键的仿生Diels-Alder二聚化发生在环境温度下,当底物暴露于空气和可见光时,最终的氧化环化发生。这些结果表明,这种天然产物可能是自发的(非酶介导的)反应性的结果。