Rh(iii)-catalyzed redox-neutral annulation of azo and diazo compounds: one-step access to cinnolines
Literature Information
Peng Sun, Youzhi Wu, Yue Huang, Xiaoming Wu, Jinyi Xu, Hequan Yao, Aijun Lin
Reported herein is a Rh-catalyzed redox-neutral annulation reaction between azo and diazo compounds, thus leading to the direct synthesis of cinnolines under mild conditions. The procedure exhibited a broad substrate scope, scalability and step economy, obviating the pre-functionalization of substrates and the use of oxidants. Further utilization of the resulting cinnolines provided efficient routes to some bioactive structures, such as 4-amino-cinnoline and 1-aminoindole.
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![2-Methyl-2-propanyl {3-[4-(4,4,5,5-tetramethyl-1,3,2-dioxaborolan-2-yl)phenyl]-3-oxetanyl}carbamate structure 2-Methyl-2-propanyl {3-[4-(4,4,5,5-tetramethyl-1,3,2-dioxaborolan-2-yl)phenyl]-3-oxetanyl}carbamate structure](https://static.chemtradehub.com/structs/127/1279090-25-3-1b84.webp)



