Cu-Catalyzed Carbocyclization for General Synthesis of N -Containing Heterocyclics Enabled by BrCF 2 COOEt as a C1 Source.

A practical and efficient copper-catalyzed carbocyclization of 2-functionalized anilines with ethyl bromodifluoroacetate has been developed. Ethyl bromodifluoroacetate is employed as the C1 source via quadruple cleavage in this transformation. This reaction can afford a variety of N -containing heterocyclics with satisfactory yields and excellent functional group compatibility.