摘要
A novel difluorocarbene promoted single-atom skeletal editing of 2H-indazoles is demonstrated herein.Ethyl bromodifluoroacetate was severed as the difluorocarbene source in the current protocol,facilitating the cleavage of the N-N bond via carbon atom insertion.This metal-free ring expansion reaction enables the late-stage diversification of indazole skeletons,assembling a diverse array of functionalized quinazolin-4(3H)-ones in decent yields with excellent functional group compatibility.
基金
supported by the National Natural Science Foundation of China(21931013,22271105)
the Natural Science Foundation of Fujian Province(2022J02009)
the Science and Technology Research Project of Education Department of Hubei Province(B2021133)
the Hubei Key Laboratory of Pollutant Analysis&Reuse Technology(PA190109)
