Acid-catalyzed polyfluoroarylation of arenes with polyfluorinated mono- and tris(phenoxy)-1-oxaspiro[2.5]octa-4,7-dienes
作者:V. N. Kovtonyuk、L. S. Kobrina
DOI:10.1007/s11172-011-0307-4
日期:2011.10
4,5,6,7,8-Pentafluoro-6-pentafluorophenoxy-1-oxaspiro[2.5]octa-4,7-diene and 4,6,8-trifluoro-5,6,7-tris(pentafluorophenoxy)-1-oxaspiro[2.5]octa-4,7-diene react with electron-rich arenes in the presence of AlCl3 or H2SO4 to give polyfluorinated phenoxybiaryls.
A simple and sustainable one-step strategy for the preparation of electron-deficient aryl trifluoromethyl ethers (ArOCF3) from the corresponding phenols by electrochemical synthesis is presented. Anodic oxidation of trifluoromethane sulfinate (Langlois reagent) leads to direct O-trifluoromethylation of phenol-derivatives bearing fluorine, chlorine, bromine and nitrile substituents under mild conditions