Synthetic Studies of 7-Oxygenated Aporphine Alkaloids: Preparation of (−)-Oliveroline, (−)-Nornuciferidine, and Derivatives
作者:Angela F. Ku、Gregory D. Cuny
DOI:10.1021/acs.orglett.5b00007
日期:2015.3.6
Moderate XPhos precatalyst loading (10 mol %) and short reaction times (30 min) were sufficient to mediate the arylations. Alkaloids 1–5 were successfully prepared, while (−)-artabonatine A was revised to syn-isomer 30. Consequently, (−)-artabonatine E likely also has a syn-configuration (31).
7-含氧aporphines 1 - 6先前已经报道了具有抗配置。为了探索它们的生物活性,利用非对映选择性还原酸介导的环化反应,然后由钯催化的邻芳基化反应建立了合成方法。适度的XPhos预催化剂负载量(10摩尔%)和短的反应时间(30分钟)足以介导芳基化反应。生物碱1 - 5被成功制备,而( - ) - artabonatine甲修改为顺式异构体30。因此,(-)-青蒿素E也可能具有同构构型(31)。