Stereoselective synthesis of (−)-8-epi-swainsonine starting with a chiral aziridine
作者:Baeck Kyoung Lee、Hwan Geun Choi、Eun Joo Roh、Won Koo Lee、Taebo Sim
DOI:10.1016/j.tetlet.2012.11.087
日期:2013.2
An efficient synthesis of (−)-8-epi-swainsonine, starting from a commercially available 1-(R)-α-methylbenzylaziridine-2-methanol, was developed. The synthetic route utilizes stereocontrolled Sharpless asymmetric dihydroxylation governed by AD-mix-β followed by an aziridine ring opening-cyclization sequence to generate the five membered N-heterocyclic ring system present in the bicyclic target. A subsequent
从可商购的1-(R)-α-甲基苄基氮丙啶-2-甲醇开始,开发了一种有效合成(-)-8- Epi- swainsonine的方法。合成路线利用立体控制的Sharpless不对称二羟基化反应(由AD-mix-β控制),然后由氮丙啶开环环化序列生成双环靶标中存在的五元N-杂环系统。随后进行的立体选择性烯丙基化和哌啶环形成环化产生了一种前体,该前体被转化为(-)-8- Epi- swainsonine。