Palladium-Catalyzed Domino Allenamide Carbopalladation/Direct C–H Allylation of Heteroarenes: Synthesis of Primprinine and Papaverine Analogues
作者:Jonathan Hédouin、Cédric Schneider、Isabelle Gillaizeau、Christophe Hoarau
DOI:10.1021/acs.orglett.8b02365
日期:2018.10.5
Palladium-catalyzed intramolecular carbopalladation onto allenamides completed by direct C–H allylation of heterocycles is studied. The domino construction/heteroarylation of isoquinolone process is first achieved. A general three-step one-pot strategy, involving in situ generation of allenamide, π-allyl-Pd complex generation, and interception with heteroarenes, has been subsequently set up. This methodology
研究了通过杂环的直接C–H烯丙基化反应完成的钯催化的分子内碳钯共沉淀到烯丙基酰胺上的过程。首先实现异喹诺酮过程的多米诺骨结构/杂芳基化。随后建立了一种通用的三步一锅策略,包括原位生成烯丙酰胺,生成π-烯丙基-Pd复合物以及用杂芳烃拦截。该方法已扩展到吲哚,二氢喹啉,异喹啉(on)es和中等大小的氮杂环的构建/杂芳基化,已知它们是具有药学意义的关键挑战性结构基序。