A Facile Route to Pyrazolo[1,2‐a]cinnoline via Rhodium(III)‐catalyzed Annulation of Pyrazolidinoes and Iodonium Ylides

Zi Yang,Yi Zhou,Haigang Li,Jieni Lei,Pingping Bing,Binsheng He,Yaqian Li

Asian Journal of Organic Chemistry（2022）

引用 13|浏览5

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摘要

A rhodium(III)‐catalysed cascade C−H bond activation/intramolecular cyclization of pyrazolidiones with iodonium ylide has been described, leading to the formation of various pyrazolo[1,2‐a]cinnolines. Herein, iodonium ylide serves as a carbene precursor. This protocol exhibits good regioselectivity and high functional group tolerability under mild reaction conditions.

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关键词

pyrazolidione,pyrazolo[1,2-a]cinnoline,iodonium ylide,cascade reaction,C−H bond functionalization

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