<scp>Fe‐Catalyzed Pictet‐Spengler‐Type</scp>
Cyclization
<i>via</i>
Selective
<scp>Four‐Electron</scp>
Reductive Functionalization of
<scp>
CO
<sub>2</sub>
</scp>
作者:Wen‐Duo Li、Jie Chen、Dao‐Yong Zhu、Ji‐Bao Xia
DOI:10.1002/cjoc.202000521
日期:2021.3
describe a novel catalytic Pictet‐Spengler‐type cyclization using CO2 as a nontoxic and sustainable C1 feedstock with environmentally benign and non‐precious‐metal iron as catalyst. The reaction is achieved by selective four‐electron reduction of CO2 into methylene level intermediate through carefully tuning the reaction parameters. A variety of tetrahydro‐β‐carbolines and other nitrogen‐containing