Studies on fluoroalkylation and fluoroalkoxylation. Part 24. Magnesium-induced single electrons transfer in reactions of fluoroalkyl iodides with alkenes and alkynes
作者:Qing-Yun Chen、Zai-Ming Qiu、Zhen-Yu Yang
DOI:10.1016/s0022-1139(00)81022-2
日期:1987.7
and the reaction could be inhibited by p-DNB. All these results seem to show that a radicalmechanism is involved in non-ethereal solvents. However, both radical addition and fluroalkyl Grignardreagent reactions are involved in THF. The formation of fluoroalkylmagnesium iodide is also found to proceed through a radical intermediate.
A novel synthesis of per(poly)fluoroalkyl aldehydes
作者:Chang-Ming Hu、Xiao-Qing Tang
DOI:10.1016/s0022-1139(00)80105-0
日期:1993.4
A novel synthesis of per(poly)fluoroalkyl aldehydes in high yield by the reaction ofper(poly)fluoroalkyliodides or bromides with dimethylformamide initiated by aPbBr2(catalyst)/Al bimetal redox system is described.
Studies on fluoroalkylation and fluoroalkoxylation. Part 10. Electron-transfer induced reactions of perfluoroalkyl iodides and the dialkyl malonate anion and β-fragmentation of the halotetrafluoroethyl radical
作者:Qing-Yun Chen、Zai-Ming Qiu
DOI:10.1016/s0022-1139(00)81433-5
日期:1986.4
malonic ester anion () in DMF to give (), 1-hydroperfluoroalkane () and dimer of the anion (). The reaction is accelerated by UV irradiation and partly suppressed by p-DNB. Diallyl ether (DAE) can trap the radical intermediates to afford five-membered ring products. Interestingly, in the case of ( X = Cl, I ) the same reaction mainly yielded tetrafluoroethylene and instead of and . The radical intermediate
The Activation of Carbon−Chlorine Bonds in Per- and Polyfluoroalkyl Chlorides: DMSO-Induced Hydroperfluoroalkylation of Alkenes and Alkynes with Sodium Dithionite
作者:Zheng-Yu Long、Qing-Yun Chen
DOI:10.1021/jo9900937
日期:1999.6.1
omega-dichloroperfluoroalkanes, the similarly stepwise reactions with an alkene is not clean, both bis-adducts and the corresponding omega-hydrides, RCH(2)CH(2)(CF(2))(n)()H as byproducts are also formed. In the absence of alkenes or alkynes, per- and polyfluoroalkyl chlorides can be converted to their sulfinate salts and sulfonyl chlorides.
Reduction of ω-chloroperfluoroalkyl iodides with lithium aluminium hydride. A single electron tranfer process
作者:Qing-Yun Chen、Ming-Fang Chen
DOI:10.1016/s0022-1139(00)80367-x
日期:1990.7
The reduction of ω-chloroperfluoroalkyl iodides(1a-b) with LiALH4 gave ω-chloroperfluoroalkyl hydride(3) and α,ω-dihydroperfluoroalkane(4). However, in the presence of olefin, the addition product (6) was obtained. The reaction can be partly suppressed by p-dinitrobenzene (p-DNB), and tetrahydrofuran derivatives were obtained from the reaction of ω-chloroperfluoroalkyl iodides with diallyl ether. A