作者:David A. Russell、Winston J. S. Fong、David G. Twigg、Hannah F. Sore、David R. Spring
DOI:10.1021/acs.jnatprod.7b00527
日期:2017.10.27
dihydroxylation-oxidative cleavage, chemoselective Baeyer–Villiger oxidation, and acid-catalyzed elimination sequence. Elaboration of elliptone to 12aβ-hydroxyelliptone was achieved via a diastereoselective chromium-mediated Étard-like hydroxylation. The semisynthesis of elliptone constitutes an improvement over previous methods in terms of safety, scalability, and yield, while the first synthesis of 12aβ-hydroxyelliptone
操作简单,立体控制抗癌鱼藤酮类鱼藤和12aβ-hydroxyelliptone,从分离的semisyntheses鱼藤elliptica和鱼藤,分别进行说明。受辛格(Singhal)的启发,通过二羟化-氧化裂解,化学选择性的拜耳-维利格(Baeyer-Villiger)氧化和酸催化的消除顺序,从鱼藤酮制得了椭圆酮。通过非对映选择性铬介导的类似埃塔德的羟基化作用,将椭圆烷修饰为12aβ-羟基椭圆烷。椭圆的半合成在安全性,可扩展性和产率方面构成了对先前方法的改进,同时还描述了12aβ-羟基椭圆的首次合成。