Copper-Catalyzed Direct C-2 Difluoromethylation of Furans and Benzofurans: Access to C-2 CF2H Derivatives
摘要:
We report herein the first copper-catalyzed C-2 difluoromethylation of furans and benzofurans. The developed methodology allows the selective introduction of the CF2CO2Et moiety at C-2 using CuI as a catalyst. This process was applied to a broad range of furans and benzofurans, giving the functionalized products in moderate to good yields. The resulting products were then decarboxylated to afford the highly valuable C-2-CF2H-substituted furans and benzofurans in good yields.
General radical difluoromethylation using difluoroacetic anhydride via photoredox catalysis
作者:Meng He、Yankai Yang、Heng Zhang、Zhipeng Guan、Zhi-Bing Dong、Hong Yi、Aiwen Lei
DOI:10.1007/s11426-023-1937-4
日期:2024.8
CF2H-containing molecules play pivotal roles in diverse fields from medicinal chemistry to materials science. However, the application of existing CF2H reagents as a source of CF2H radical is limited by their reactivity and preparation. Herein, we develop a simple and general visible-light-catalyzed radical difluoromethylation reaction of alkenes, dienes, and heteroaromatics using commercially available