isomerized into enolates (enols) by [Cp*IrCl2]2. The enolates react with Selectfluor present in the reaction media. This method produces α-fluoroketones as single constitutional isomers in high yields. iridium - fluorine - isomerization - alcohols - fluoro ketones
challenges remain for the asymmetric synthesis of tertiary α-fluoroketones, which are potentially useful molecules for the development of drugs, agrochemicals, and functional materials. Herein, we describe the development of a method for the catalytic enantioselective synthesis of tertiary α-fluoroketones via the Tsuji–Trost reaction of racemic acyclic α-fluorinated ketones. Enantioenriched acyclic α-cabonyl
Iridium-Catalyzed Asymmetric Hydrogenation of α-Fluoro Ketones via a Dynamic Kinetic Resolution Strategy
作者:Xuefeng Tan、Weijun Zeng、Jialin Wen、Xumu Zhang
DOI:10.1021/acs.orglett.0c02565
日期:2020.9.18
The discrimination of a fluorine atom from a hydrogen atom has been challenging in asymmetric catalysis. We herein report iridium-catalyzed hydrogenation of α-fluoro ketones using a strategy of dynamic kinetic resolution. Both enantiomeric and diastereomeric selectivities were satisfactory in the preparation of β-fluoro alcohols. The DFT calculation revealed a C–F···Na charge–dipole interaction in