Copper-Catalyzed Radical Difluoroalkylation and Redox Annulation of Nitroalkynes for the Construction of C2-Tetrasubstituted Indolin-3-ones

An efficient and convenient method with wide applicability for the synthesis of C2-tetrasubstituted indolin-3-ones via copper-catalyzed redox cycloisomerization of nonprefunctionalized nitroalkynes has been developed. This protocol features simple operation, readily available starting materials, good functional group tolerance, broad scope, and diboron as the reductant.

Halodifluoroacetates as formylation reagents for various amines via unprecedented quadruple cleavage

Unprecedented quadruple cleavage of halodifluoromethyl compounds has been disclosed for the first time, resulting in carbonyl synthons for reaction with various amines.

Dual role of ethyl bromodifluoroacetate in the formation of fluorine-containing heteroaromatic compounds

An efficient one-pot cascade process via unprecedented quadruple cleavage of BrCF₂COOEt with primary amines to afford valuable fluorine-containing heterocycles is described, in which BrCF₂COOEt plays a dual role as a C1 synthon and a difluoroalkylating reagent for the first time.

Reductive N-alkylation of primary and secondary amines using carboxylic acids and borazane under mild conditions

An expedient strategy of reductive N-alkylation of amines with readily available carboxylic acids as alkylating reagents has been developed.

Tandem radical cyclization for the construction of 1-difluoroalkylated isoquinolines via Cu catalyzed and visible light-promoted pathways

A Cu/B₂pin₂ system promoted cyclization for the synthesis of 1-difluoroalkylated isoquinolines with vinyl isocyanides and bromodifluoroacetic derivatives in moderate to good yields was reported.