Electroorganic synthesis under solvent-free conditions. Highly regioselective anodic monofluorination of cyclic ethers, lactones, and a cyclic carbonate
摘要:
Regioselective anodic fluorination of cyclic ethers, lactones, and a cyclic carbonate in Et4NF.nHF (n = 4, 5) and Et3N.5HF without a solvent was successfully carried out to give the corresponding monofluorinated products in moderate yields. This is the first report of direct electochemical fluorination of cyclic ethers, lactones, and a cyclic carbonate using anodic fluorination. (C) 2002 Elsevier Science Ltd. All rights reserved.
gamma -Butyrolactone was fluorinated by molecular fluorine to obtain its mono-fluorinated derivatives for possible lithium battery electrolyte application. The reaction was carried out at 30 degreesC by introducing 20% F-2/N-2 gas into gamma -butyrolactone without solvent. Major products were beta -fluoro-gamma -butyrolactone and gamma -fluoro-gamma -butyrolactone, which cannot be obtained by conventional organic synthesis. Selectivity to gamma -isomer was enhanced by the addition of NaF as a HF scavenger. (C) 2001 Elsevier Science B.V. All rights reserved.
Electroorganic synthesis under solvent-free conditions. Highly regioselective anodic monofluorination of cyclic ethers, lactones, and a cyclic carbonate
作者:Masaru Hasegawa、Hideki Ishii、Toshio Fuchigami
DOI:10.1016/s0040-4039(02)00047-3
日期:2002.2
Regioselective anodic fluorination of cyclic ethers, lactones, and a cyclic carbonate in Et4NF.nHF (n = 4, 5) and Et3N.5HF without a solvent was successfully carried out to give the corresponding monofluorinated products in moderate yields. This is the first report of direct electochemical fluorination of cyclic ethers, lactones, and a cyclic carbonate using anodic fluorination. (C) 2002 Elsevier Science Ltd. All rights reserved.