- Complexation and Photoinduced Electron-transfer Reaction between Perfluoroalkyl Iodides and N,N,N',N'-Tetramethylphenylene-1,4-diamine, Anilines and Piperazines
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Treatment of tetrafluoro-1,2-diiodoethane 1a or dodecafluoro-1,6-diiodohexane 1b with N,N,N',N'-tetramethylphenylene-1,4-diamine 2 gave 1 + 1 solid complexes 3a or 3b in high yields.Complex 3a decomposed to give tetrafluoroethylene, iodine and 2 when irradiated with UV or heated.Complex 3b was converted into 6H-dodecafluorohexyl-N,N,N',N'-tetramethylphenylene-1,4-diamine 4 when irradiated with UV.On treatment of 1a and 1b with piperazine 6a and N,N'-dimethylpiperazine 6b, 1 + 1 solid complexes 7 were similarly obtained.However, heating or irradiating 7 gave no perfluoroalkylated products.Irradiating a mixture of 2 or anilines 13 and perfluoroalkyl iodides 10 in dimethylformamide also gave perfluoroalkylated products.The photoinduced electron transfer reaction involved radical cation 2*+ as a reactive intermediate which was detected by EPR techniques.
- Chen, Qing-Yun,Li, Zhan-Ting,Zhou, Cheng-Min
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p. 2457 - 2462
(2007/10/02)
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- PERFLUOROALKYLATION OF 2-MERCAPTOBENZOTHIAZOLE AND ITS ANALOGUES WITH PERFLUOROALKYL IODIDES BY AN SRN1 REACTION
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The thiolates, generated in situ by the reaction of 2-mercaptobenzothiazole (1) and its analogues (2) and (3) with sodium hydride, react under UV irradiation with perfluoroalkyl iodides (4)-(8) to give the corresponding heteroaromatic perfluoroalkyl sulfides (9)-(18) in 50-98percent yields.The fact that the UV irradiation increases the conversion of perfluoroalkyl iodides and that the radical scavenger di-tert-butylnitroxide suppresses the reaction demonstrates that the reaction proceeds via an SRN1 mechanism.
- Chen, Qing-Yun,Chen, Mei-Jin
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