<scp>Cu‐Catalyzed</scp>
Cascade Cyclization of Ketoxime Acetates and Alkynals Enabling Synthesis of Acylpyrroles
作者:Zhenhua Xu、Ning Xian、Hongbiao Chen、Guo‐Jun Deng、Huawen Huang
DOI:10.1002/cjoc.202000660
日期:2021.5
A facile copper‐based catalytic system has been developed to enable efficient cyclization of methylketoximes and alkynals. This protocol provides a viable entry to synthetically and pharmaceutically useful 2‐acylpyrroles with a broad range of compatible functionalities. Mechanistically, a key acyl migration is probably involved that leads to the formation of N‐acyl pyrroles or otherwise NH pyrroles
已经开发了一种简便的基于铜的催化系统,以实现甲基酮肟和炔烃的高效环化。该协议为具有广泛兼容功能的合成和药学上有用的2-酰基吡咯化合物提供了可行的入口。从机理上讲,关键的酰基迁移可能涉及通过进一步水解形成N-酰基吡咯或NH吡咯的过程。更重要的是,本反应系统还提供了通过简单添加羧酸即可实现三组分吡咯组装的机会。