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.
Nickel(0)-Catalyzed Fluoroalkylation of Alkenes, Alkynes, and Aromatics with Perfluoroalkyl Chlorides
作者:Xiao-Ting Huang、Qing-Yun Chen
DOI:10.1021/jo010178j
日期:2001.6.1
Treatment of perfluoroalkyl chlorides (R(F)Cl) with alkenes, alkynes, or aromatics in the presence of 0.1 equiv of nickel dichloride, 1.5 equiv of zinc powder, and 0.4 equiv of triphenylphosphine in DMF at 95-100 degrees C for 6-8 h give the corresponding perfluoroalkylated products in good yields. A single electron-transfer mechanism is suggested.
Studies on polyhaloalkanes. V. A new reduction system: zinc/hydrazine hydrate
作者:Fang-Hong Wu、Bing-Nan Huang、Wei-Yuan Huang
DOI:10.1016/0022-1139(95)03232-3
日期:1995.8
zinc/hydrazine hydrate as a new reduction system, polyfluoroalkylhalides such as Cl(CF2)nH (1a–c, n = 4, 6, 8), Cl(CF2)nI (1e, n=4, 6, 8) and R(CF2)nCl (n = 4, 6, 1h,i) have been converted to the corresponding reduction products H (CF2)nH (2a–g, n = 4, 6, 8) and R(CF2)nH (n = 4, 6, 2h, i) in high yield. Reduction of the CF2C1 group was faster than that of the CHI in the reaction of 1m.