Enantioselective Total Syntheses of (−)-Rhazinilam, (−)-Leucomidine B, and (+)-Leuconodine F
作者:Dylan Dagoneau、Zhengren Xu、Qian Wang、Jieping Zhu
DOI:10.1002/anie.201508906
日期:2016.1.11
A divergent total synthesis of three structurally distinct natural products from imine 9 was accomplished through an approach featuring: 1) a Pd‐catalyzed decarboxylative cross‐coupling, and 2) heteroannulation of 9 with bromoacetaldehyde and oxalyl chloride to give tetrahydroindolizine 6 and dioxopyrrole 7, respectively. The former was converted into (−)‐rhazinilam, while the latter was converted
通过以下方法完成了亚胺9的三种结构不同的天然产物的不同总合成:1)Pd催化的脱羧交叉偶联,以及2)9与溴乙醛和草酰氯的杂环化,得到四氢吲哚嗪6和二氧杂吡咯7,分别。前者转化为(-)-rhazinilam,而后者转化为(-)-leucomidine B和(+)-leuconodineF。通过使用均相钯催化剂,底物定向的空间非偏置双键高度非对映选择性还原发展了。隐隐胞苷B观察到自诱导的非对映异构性(SIDA)现象。