Photoexcited acetophenone can catalyze the fluorination of unactivatedC(sp(3))-H groups. While acetophenone, a colorless oil, only has a trace amount of absorption in the visiblelight region, its photoexcitation can be achieved by irradiation with light generated by a household compact fluorescent lamp (CFL). This operational simple method provides improved substrate scope for the direct incorporation
Oxidative Aliphatic C-H Fluorination with Fluoride Ion Catalyzed by a Manganese Porphyrin
作者:Wei Liu、Xiongyi Huang、Mu-Jeng Cheng、Robert J. Nielsen、William A. Goddard、John T. Groves
DOI:10.1126/science.1222327
日期:2012.9.14
fluorinated organic compounds in drug development, there are no direct protocols for the fluorination of aliphatic C-H bonds using conveniently handled fluoride salts. We have discovered that a manganese porphyrin complex catalyzes alkyl fluorination by fluorideion under mild conditions in conjunction with stoichiometric oxidation by iodosylbenzene. Simple alkanes, terpenoids, and even steroids were selectively
Catalytic enantiocontrol over a non-classical carbocation
作者:Roberta Properzi、Philip S. J. Kaib、Markus Leutzsch、Gabriele Pupo、Raja Mitra、Chandra Kanta De、Lijuan Song、Peter R. Schreiner、Benjamin List
DOI:10.1038/s41557-020-00558-1
日期:2020.12
Carbocations can be categorized into classical carbenium ions and non-classicalcarboniumions. These intermediates are ubiquitous in reactions of both fundamental and practical relevance, finding application in the petroleum industry as well as the discovery of new drugs and materials. Conveying stereochemical information to carbocations is therefore of interest to a range of chemical fields. While
作者:Richard D. Chambers、Mandy Parsons、Graham Sandford、Roy Bowden
DOI:10.1039/b001624l
日期:——
Transformation of carbon–hydrogenbonds to carbon–fluorine bonds at saturated secondary and tertiary carbon sites by electrophilic aliphatic substitution processes is possible using either elemental fluorine or fluorinating reagents of the N–F class.
Elemental fluorine. Part 14.1 Electrophilic fluorination and nitrogen functionalisation of hydrocarbons
作者:Richard D. Chambers、Alan M. Kenwright、Mandy Parsons、Graham Sandford、John S. Moilliet
DOI:10.1039/b204776b
日期:2002.10.1
achieved by reaction with either elemental fluorine or Selectfluor™, an electrophilic fluorinatingreagent of the N–Fclass. An electrophilic mechanism is envisaged. On prolonged reaction, the strongly acidic reaction medium that is formed upon substitution of hydrogen by fluorine when Selectfluor™ is used as the fluorinatingreagent, promotes loss of fluoride from the initial fluorinated product. Trapping