Trifluoromethyl ethers R-OCF3 are easily synthesized from the corresponding dithiocarbonates R-OCS2Me (R = aryl or primary alkyl) by a reagent system consisting of 70% HF/pyridine and an N-halo imide. When the reaction is applied to R-OCS2Me wherein R = secondary alkyl, tertiary alkyl, or benzylic group, fluorination leading to the corresponding alkyl fluorides R-F is achieved, whereas a combination
A General and Efficient Solution to Monofluoroalkylation: Divergent Synthesis of Aliphatic Monofluorides with Modular Synthetic Scaffolds
作者:Bing‐Bing Wu、Jie Xu、Qian Gao、Kang‐Jie Bian、Guo‐Kai Liu、Xi‐Sheng Wang
DOI:10.1002/anie.202208938
日期:2022.9.5
A general method allows preparation of diverse monofluorides based on the monofluoroalkyl triflate scaffold. Both nickel-catalyzed hydromonofluoroalkylation of unactivated alkenes and copper-catalyzed monofluoroalkylation of Grignard reagents were studied. Further utilities including conversion into conventional fluoroalkylating reagents and construction of monofluoro-alkoxy, -alkylamino motifs.