| 摘要 |
In the present invention, there is disclosed a process for preparing a polyfluorinated agent of the general formula I, in which n = 1 to 2, Rifpf is selected from the group consisting of: CFi2CFi2CFi3, CFi2(CFi2)i2CFi3, CFi2(CFi2)i4CFi3, CFi2(CFi2)i6CFi3, CFi2(CFi2)i8CFi3, CFi2(CFi2)i3CF(CFi3)i2, CFi2(CFi2)i5CF(CFi3)i2 and X denotes Cl, characterized in that in a first stage, there is prepared by reacting RifCHi2CHi2I iodide with tert-butyllithium at a temperature ranging from -90 to -60 degC a solution of an organolithium agent RifCHi2CHi2Li in a mixture of pentane-diethyl ether in volume ration in the range of 1 to 2:1 and in the second stage a silane substrate Cl(CHi2)inSiCli3, wherein n is 2, 3 is added to this solution in molar ratio of the organolithium agent to silane substrate in the range of 3 to 4:1. |
