A new synthetic method toward a key intermediate in the total synthesis of alkannin and shikonin
作者:Xiaogang Zheng、Hang Hu、Defeng Xu
DOI:10.1177/17475198211011697
日期:2021.9
the present work, a new synthetic method toward a key intermediate in the total synthesis of alkannin and shikonin is developed. The key intermediate, 4-methyl-1-(naphtho[1,8-de:4,5-d’e’]bis([1,3]dioxine)-4-yl)pent-3-en-1-one (5), is synthesized via the reaction of 1,8:4,5-bis(methylenedioxy)naphthalene-2-carboxylic acid N-methoxy-N-methylamide with prenyllithium. This synthetic approach avoids the
在目前的工作中,开发了一种新的合成方法,该方法是链烷烃和紫草素总合成中的关键中间体。关键中间体4-甲基-1-(萘[1,8- de:4,5- d'e' ]双([1,3]二恶英)-4-基)戊-3-en-1-通过1,8:4,5-双(亚甲基二氧基)萘-2-甲酸N-甲氧基-N-甲基酰胺与异戊烯基锂的反应合成一种(5)。这种合成方法避免了使用不易获得的N-甲氧基-N,4-二甲基戊-3-烯酰胺和有毒的氰化钠。