作者:Christopher G. Newton、Duc N. Tran、Matthew D. Wodrich、Nicolai Cramer
DOI:10.1002/anie.201708333
日期:2017.10.23
A gram‐scale synthesis of psiguadial B, a purported inhibitor of human hepatoma cell growth, has been achieved in one step by a biomimetic three‐component coupling of caryophyllene, benzaldehyde, and diformylphloroglucinol. This cascade reaction is catalyzed by N,N′‐dimethylethylenediamine, and proceeds at ambient temperature to generate four stereocenters, two rings, one C−O bond, and three C−C bonds
拟南芥B(一种据称是人类肝癌细胞生长抑制剂)的克级合成,是通过仿生三成分的石竹烯,苯甲醛和二甲酰间苯三酚实现的。此级联反应由N,N'-二甲基乙二胺催化,在环境温度下进行以生成四个立体中心,两个环,一个C-O键和三个C-C键。结合计算和实验研究表明,天然产物的生物合成是非酶介导的,这是在石竹烯和反应性邻醌甲基化物之间添加迈克尔,随后是两个连续的分子内阳离子环化事件的结果。