作者:Nadège David、Raffaele Pasceri、Russell R. A. Kitson、Alexandre Pradal、Christopher J. Moody
DOI:10.1002/chem.201601605
日期:2016.7.25
A short formal total synthesis of the marine natural product diazonamide A is described. The route is based on indole oxidative rearrangement, and a number of options were investigated involving migration of tyrosine or oxazole fragments upon oxidation of open chain or macrocyclic precursors. The final route proceeds from 7‐bromoindole by sequential palladium‐catalysed couplings of an oxazole fragment
描述了海洋天然产物重氮酰胺A的简短正式全合成。该路线基于吲哚氧化重排,并且研究了许多选择,其中涉及在开链或大环前体氧化时酪氨酸或恶唑片段的迁移。最终途径从7-溴吲哚开始,在C-2处依次进行钯催化的恶唑片段偶联,然后在C-3处进行酪氨酸片段偶联。有了关键的2,3-二取代吲哚,大环内酰胺的形成为3,3-二取代的羟吲哚的关键氧化重排奠定了基础。尽管同时形成了不需要的吲哚异构体,但在脱保护后,该合成成功地递送了关键的羟吲哚中间体,从而完成了重氮酰胺A的正式全合成。