An approach towards the total synthesis of (+)-epiquinamide and (+)-α-conhydrine from Garner aldehyde
作者:Ajay Kumar Srivastava、Sanjit Kumar Das、Gautam Panda
DOI:10.1016/j.tet.2009.04.074
日期:2009.7
A short and stereoselective route for the synthesis of 1-hydroxyquinolizidine, an advanced synthetic intermediate for the total synthesis of (+)-epiquinamide is presented. The key synthetic steps involve diastereoselective nucleophilic addition on l-serine derived Garner aldehyde and acid mediated (PTSA) ring closing metathesis. The methodology is also elaborated successfully for the total synthesis
提出了一种短而立体的合成1-羟基喹oli嗪的立体选择途径,1-羟基喹oli嗪是一种用于(+)-表喹酰胺全合成的高级合成中间体。关键的合成步骤涉及在1-丝氨酸衍生的加纳醛上的非对映选择性亲核加成和酸介导的(PTSA)闭环复分解。该方法还成功地阐述了全合成重要的哌啶生物碱(+)-α-conhydrine的方法。