O-(PERFLUOROALKYL)DIBENZOFURANIUM SALT DERIVATIVES, INTERMEDIATES FOR THE PREPARATION OF THE SAME, PROCESS FOR THE PREPARATION OF THE INTERMEDIATES, PERFLUOROALKYLATING AGENTS, AND PROCESS FOR PERFLUOROALKYLATION
申请人:Daikin Industries, Limited
公开号:EP1013651A1
公开(公告)日:2000-06-28
O-(perfluoroalkyl)dibenzofuranium salt derivatives represented by the following general formula (1),
(wherein Rf in said general formula (1) is a C1-10 perfluoroalkyl group and X- is a conjugate base of a Brönsted acid). Intermediates for preparation of the derivatives, a preparation method thereof, perfluoroalkylating agents comprising the said derivatives and the said preparation intermediates, and a perfluoroalkylating method.
The present invention can provide O-(perfluoroalkyl)dibenzofuranium salt derivatives as perfluoroalkylating agents which show good yields in the perfluoroalkylation reaction, a wide range of application and comparatively stable properties with repressed self-decomposition, the intermediate for preparation thereof, a preparation method for the intermediates thereof, the perfluoroalkylating agents and a perfluoroalkylation method.
CF<sub>3</sub> Oxonium Salts, <i>O</i>-(Trifluoromethyl)dibenzofuranium Salts: In Situ Synthesis, Properties, and Application as a Real CF<sub>3</sub><sup>+</sup> Species Reagent
作者:Teruo Umemoto、Kenji Adachi、Sumi Ishihara
DOI:10.1021/jo070896r
日期:2007.8.31
We report in situ synthesis of the first CF3 oxonium salts, thermally unstable O-(trifluoromethyl)dibenzofuranium salts, which furthermore have different counteranions (BF4-, PF6-, SbF6-, and Sb2F11-) and ring substituents (tert-butyl, F, and OCH3), by photochemical decomposition of the corresponding 2-(trifluoromethoxy)biphenylyl-2‘-diazonium salts at −90 to −100 °C. The yields markedly increased in