Room Temperature Benzofused Lactam Synthesis Enabled by Cobalt(III)‐Catalyzed C(
<i>sp</i>
<sup>2</sup>
)−H Amidation
作者:Xun Tian、Xin Li、Shengzu Duan、Ya Du、Tongqi Liu、Yongsheng Fang、Wen Chen、Hongbin Zhang、Minyan Li、Xiaodong Yang
DOI:10.1002/adsc.202001254
日期:2021.2.16
Benzofused lactams, especially indolin‐2‐one and dihydroquinolin‐2‐one are popular structural motives in durgs and natural products. Herein, we developed a room temperature and robust synthesis of benzofused lactams through cobalt(III)‐catalyzed C(sp2)−H amidation. In this protocol, in‐situ formation of Cp*Co(III)(ligand) catalyst from Cp*Co(CO)I2 and ligand simplify the synthetic effort of cobalt
苯并融合的内酰胺,尤其是吲哚-2-酮和二氢喹啉-2-酮是在草和天然产品中流行的结构动机。在本文中,我们开发了室温并且通过钴(III)催化的C(sp 2)-H酰胺化反应稳定合成苯并融合的内酰胺。在该协议中,由Cp * Co(CO)I 2和配体原位形成Cp * Co(III)(配体)催化剂可简化钴配合物的合成工作。简单且易于合成的1,4,2-二恶唑5-1在室温下进行分子内CH酰胺化反应,并以高达86%的收率提供了多种功能化的苯并融合内酰胺。还证明了反应的可扩展性。