Biomimetic Epoxide-Opening Cascades of Oxasqualenoids Triggered by Hydrolysis of the Terminal Epoxide
作者:Yoshiki Morimoto、Eriko Takeuchi、Hitomi Kambara、Takeshi Kodama、Yoshimitsu Tachi、Keisuke Nishikawa
DOI:10.1021/ol401081e
日期:2013.6.21
cascades from squalene polyepoxides 4–6 to triterpene polyethers (oxasqualenoids) teurilene (1), glabrescol (2), and omaezakianol (3), respectively, were reproduced in a single event by chemical reaction. These cascades proceeded through the 5-exo tandem cyclization triggered by Brønsted acid-catalyzed hydrolysis of the terminal epoxide, mimicking the direct hydrolysis mechanism of epoxide hydrolases
从角鲨烯多环氧化合物4至6到三萜烯聚醚(恶戊二烯类化合物)的丁二烯(1),草甘膦(2)和奥马崎醇(3)的仿生环氧化物开放级联反应都是通过化学反应在一次事件中复制的。这些级联反应是通过布朗斯台德酸催化末端环氧化物水解引发的5- exo串联环化进行的,模仿了环氧化物水解酶的直接水解机理。