Rearrangement and double fluorination in the deiodinative fluorination of neopentyl iodide with xenon difluoride
作者:Timothy B. Patrick、Likang Zhang、Quinhua Li
DOI:10.1016/s0022-1139(99)00234-1
日期:2000.3
products from the neopentyl rearrangement on reaction with xenondifluoride. Neopentyl iodide performs a double rearrangement and yields a gem-difluoro product, 2,2-difluoro-3-methylbutane. Studies of the mechanism show that an alkene intermediate is involved in the double rearrangement process. Alkenes can be substituted as substrates in reaction with xenon difluoride–iodine to give gem-difluoro products
Arylsulfur trifluorides: Improved method of synthesis and use as in situ deoxofluorination reagents
作者:Wei Xu、Henry Martinez、William R. Dolbier
DOI:10.1016/j.jfluchem.2011.05.001
日期:2011.7
improved method of synthesis of arylsulfurtrifluorides, including the excellent, new deoxofluorination reagent Fluolead, is hereby reported. The method utilizes Br2 and KF as oxidizing and fluorinating reagents for efficient, high yield conversion of aryl disulfides and mercaptans to arylsulfurtrifluorides. It has also been shown that both Fluolead and mesitylsulfur trifluoride may be generated in acetonitrile
Vic-Difluorination proceeds by the reaction of fluoroalkenes with xenondifluoride to afford the corresponding fluorinated compounds. From the reaction with polyfluoroalkenes, the products are obtained in high to excellent yields. In this reaction, the fluorine atom substituent of alkene stabilizes the cation intermediate and suppresses side-reactions such as rearrangement.
Regioselective Monofluorination of Hydrofluorocarbons by the Use of Cobalt Trifluoride
作者:Akira Sekiya、Shigeru Kurosawa、Toshiro Yamada
DOI:10.1246/cl.1991.2183
日期:1991.12
The geminal-difluoro hydrofluorocarbons (HFCs) were fluorinated by the use of cobalt trifluoride (CoF3). Regioselective monofluorination of geminal-difluoro compound was achieved on methylene position neighboring gem-difluoromethylene group, and trifluoro compounds were obtained in good yields under mild conditions.
Common Lewis superacids often suffer from low thermal stability or complicated synthetic protocols, requiring multi-step procedures and expensive starting materials. This prevents their large-scale application. Herein, the easy and comparably cheap synthesis of high-purity aluminium tris(fluorosulfate) ([Al(SO3F)3]x, AFS) is presented. All starting materials are commercially available and no work-up
常见的路易斯超强酸通常具有低热稳定性或复杂的合成方案,需要多步骤程序和昂贵的起始材料。这阻碍了它们的大规模应用。在此,提出了高纯度三(氟硫酸)铝([Al(SO 3 F) 3 ] x ,AFS)的简单且相对便宜的合成方法。所有起始材料均可商购,无需后处理。使用理论和实验方法证明了这种热稳定的聚合路易斯酸的超强酸性。此外,还显示了其合成和催化适用性,例如在键异解反应和 C-F 键活化中。