S<sub>8</sub>-Catalyzed triple cleavage of bromodifluoro compounds for the assembly of N-containing heterocycles
作者:Shuilin Deng、Haohua Chen、Xingxing Ma、Yao Zhou、Kai Yang、Yu Lan、Qiuling Song
DOI:10.1039/c9sc01333d
日期:——
cleavage of three C–X bonds, including two inert C(sp3)–F bonds on bromodifluoroacetamides, while leaving C–C bonds intact. This strategy will undoubtedly further consummate the role of halo difluoro compounds and enrich both fluorine chemistry and pharmaceutical sciences.
Cooking with gas: Copper complexes serve as excellent catalysts for the directcarboxylation of aromatic heterocyclic CHbonds with CO2, thereby offering an economical and environmentally benign process for the synthesis of heterocyclic carboxylic esters (see scheme; IPr=1,3‐bis(2,6‐diisopropylphenyl)imidazol‐2‐ylidene). Some active intermediates of this reaction have been isolated and structurally
A novel and straightforward intramolecular cyclization of glycine derivatives to 2-substituted benzoxazoles through copper-catalyzed oxidative C–H/O–H cross-coupling was described. A variety of glycine derivatives involving short peptides underwent cross-dehydrogenative-coupling readily to afford diverse 2-substituted benzoxazoles. The synthetic method has the advantages of simple operation, broad