Copper-Catalyzed Aerobic Cyclization of β,γ-Unsaturated Hydrazones with Concomitant C═C Bond Cleavage
作者:Zhenwei Fan、Jiahao Feng、Yuchen Hou、Min Rao、Jiajia Cheng
DOI:10.1021/acs.orglett.0c02911
日期:2020.10.16
aerobic oxidative cyclization of β,γ-unsaturated hydrazones for the preparation of pyrazole derivatives has been developed. The hydrazonyl radical promoted the cyclization, along with a concomitant C═C bond cleavage of β,γ-unsaturated hydrazones. This process has been verified via several control experiments, including a radical-trapping study, an 18O-labeling method, and the identification of the possible
已经开发出Cu催化的β,γ-不饱和的需氧氧化环化反应,用于制备吡唑衍生物。肼基自由基促进了环化,并伴随着β,γ-不饱和的C═C键裂解。该过程已通过一些对照实验进行了验证,包括自由基捕获研究,18 O标记方法以及可能副产物的鉴定。该反应的优点包括操作简单,反应范围宽和温和的选择性反应过程。