全氟链烷磺酸酐[(R F SO 2)2 O; R F= CF 3,C 2 F 5,C 4 F 9 ],与母体酸混合,热分解得到相应的全氟烷基全氟链烷磺酸盐(R F SO 3 R F),并释放出SO 2。如果酸酐和酸中的全氟烷基部分不同,则获得对称和不对称酯的混合物。从结果推导了离子双分子机理,并提出了一种新的容易合成的对称全氟化磺酸酯的新方法。
Synthesis of heteroaromatic trifluoromethyl ethers with trifluoromethyl triflate as the source of the trifluoromethoxy group
作者:Qing-Wei Zhang、John F. Hartwig
DOI:10.1039/c8cc05084h
日期:——
A series of nitrogen-heterocycles have been transformed to the corresponding trifluoromethyl or higher perfluoroalkyl ethers by reaction of the corresponding N-oxides with trifluoromethyl or higher perfluoroalkyl triflate. Trifluoromethyl triflate, which has generally been used as a precursor to [OCF3]−, is used here as a bifunctional reagent to render the heteroarene more electrophilic and to deliver
Perfluoroalkanesulfonic anhydrides (RFSO2)2O when mixed with acids decompose into perfluoroalkanesulfonic esters RFSO2ORF, thereby providing a new facile synthesis of these esters from perfluoroalkanesulfonic acids and phosphorus pentoxide.
全氟链烷磺酸酐(R F SO 2)2 O与酸混合时分解为全氟链烷磺酸酯R F SO 2 OR F,从而提供了一种由全氟链烷磺酸和五氧化二磷合成这些酯的新方法。