α,ω-二碘全氟乙烷和丁烷的一些反应

Some Reactions of α, ω-Diiodoperfluoroethane and α, ω-Diiodoperfluorobutane

近年来,以锌为催化剂用超声波进行氟烷基化反应已有不少报道,但反应物限于全氟烷基碘RF I。对于I(CF_(2))^(2) I(Ⅰ)、I(CF_(2))4I(Ⅱ)这类α,ω-二碘全氟烷烃未见报道。作者用(Ⅰ)或(Ⅱ)在DMF或THF中,于室温下加入锌粉(锌粉经活化或未活化),立即有气体逸出,若施加超声波,气体更甚。加入碘苯亦无预期产物,这是符合β-断裂、碘极易脱离生成全氟烯烃之说的。

The fluoroalkylation of iodobenzene with α,ω-diiodoperfluorobutane (Ⅱ) in the presence of copper gave ω-iodoperfluorobutylbenzene. After etherific-ation with substituted thiophenol under UV, it afforded suitable bisthioethers. When α,ω-diiodoperfluoroethane (Ⅰ)was used, no such products were obtained. The treatments Of (Ⅰ) and (Ⅱ) with 35% H_(2)O_(2) and (CF_(3)CO)_(2)O yielded corresponding iodonium compounds with good yields.