A new method for the preparation of perfluorocarboxylic acids
作者:Bing-Nan Huang、A. Haas、M. Lieb
DOI:10.1016/s0022-1139(00)82053-9
日期:1987.6
perfluorocarboxylates [CF3(CF2)n-1CO2Na, n = 2 ∼ 11] in 51 – 86 % yields, and these were transformed to the respective perfluorocarboxylic acids [CF3(CF2)n−1CO2H, n = 2 ∼ 11] by treatment with sulfuric acid. This provides a newmethod for the synthesis of perfluorocarboxylic acids.
Stereoselective Fluoroalkylacylation of Alkynes via Cooperative <i>N</i>-Heterocyclic Carbene/Palladium Catalysis
作者:Ying Huang、Xin-Han Wang、Chun-Lin Zhang、Song Ye
DOI:10.1021/acs.orglett.4c00875
日期:2024.4.26
N-heterocyclic carbene- and palladium-catalyzed three-component reaction of alkynes with aldehydes and fluoroalkyl iodides is developed. A series of biologically valuable CF2R-incorporated α-substituted enones was obtained in moderate to good yields. This mild catalytic method exhibits exclusive regio- and stereoselectivity, excellent functional group tolerance, and a broad substrate scope including terminal
potentially harmful oxidants was achieved using an oxidation method that integrated a fluorous iron(III) salen catalyst derived from common metals and pivalaldehyde. Several aromatic disubstituted olefins were converted into their corresponding epoxides with high efficiency and quantitative yields. This reaction represents an environmentally friendly oxidation process that utilizes an abundant source of air
Tripyrazolylmethanes represent a novel class of uncharged ligands analogous to charged tripyrazolylborates (scorpionates), which are isoelectronic and isolobal with cyclopentadienides. We report here a straightforward synthesis of the first polyfluoroalkylated tripyrazolylmethane ligands bearing C4F9-C12F25 ponytails, based on allylation/perfluoroalkylation/reduction sequence of transformations of 2,2,2-tripyrazol-1-ylethanol. Model complexation reactions of these ligands gave sandwich complexes of copper(II), nickel(II), cobalt(II) and iron(II), the structure of which was confirmed by detailed MS analysis, as well as by NMR spectroscopy for the fourth diamagnetic complex. Fluorophilicity of the ligands and their complexes peaks for C10F21 ponytail but lies below zero. (C) 2011 Elsevier B.V. All rights reserved.
769. Reactions of fluorocarbon radicals. Part XII. The synthesis of fluorocarbons and of fully fluorinated iodo-, bromo-, and chloroalkanes