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
Conversion of (sp<sup>3</sup>)C–F Bonds of Alkyl Fluorides to (sp<sup>3</sup>)C–Heteroatom (Heteroatom = I, SR, SeR, TeR) Bonds by the Use of Magnesium Reagents Having Heteroatom Substituents
作者:Shameem Ara Begum、Jun Terao、Nobuaki Kambe
DOI:10.1246/cl.2007.196
日期:2007.1
A convenient method for conversion of (sp 3 )C-Fbonds to (sp 3 )C-Z (Z = I, SR, SeR, TeR) bonds has been developed. The reaction proceeds at room temperature using magnesium salts (Z-MgX). S N 2 mechanism for substitiution of primary alkyl fluorides with MgI 2 in ether was supported by the inversion of the stereochemistry of the carbon connecting to F.
已经开发了一种将 (sp 3 )CF 键转换为 (sp 3 )CZ (Z = I, SR, SeR, TeR) 键的简便方法。该反应在室温下使用镁盐 (Z-MgX) 进行。用 MgI 2 在醚中取代伯烷基氟化物的 SN 2 机制得到了连接到 F 的碳的立体化学反转的支持。
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.