Synthesis of 2<i>H</i>-Indazoles<i>via</i>Tandem Palladium-Catalyzed Deacylative Cross-Coupling and Denitrogenative Cyclization of 2-Iodoazoarenes and 2-Iodoaryltriazenes with Acyldiazoacetates in One-Pot
作者:Woo-Soon Yong、Sangjune Park、Hyunsik Yun、Phil Ho Lee
DOI:10.1002/adsc.201600351
日期:2016.6.16
2H‐indazoles was developed via a tandem palladium‐catalyzed deacylative cross‐coupling reaction of 2‐iodoazoarenes and 2‐iodoaryltriazenes with acyldiazoacetates and denitrogenative cyclization reaction of in situ generated diazoacetates having azoaryl and triazenylaryl moieties in one‐pot. Additionally, azoaryl‐substituted diazoacetates underwent palladium‐catalyzed denitrogenative cyclization to produce
通过2-钯偶氮芳烃和2-碘芳芳基三氮烯与酰基重氮乙酸的串联钯催化脱酰基交叉偶联反应以及原位生成的具有偶氮芳基和三氮烯基芳基的重氮乙酸酯的脱氮环化反应,开发了一种制备多种2 H-吲唑的合成方法。一锅。此外,将偶氮芳基取代的重氮乙酸酯进行钯催化的脱氮环化反应,生成2 H-吲唑。本反应是一个很好的例子,其中Pd(0)催化剂在一锅中参与了两个催化循环。