- Synthesis of some ytterbium(III) tris-(perfluoroalkylsulfonyl)methides
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Full experimental details are given for the preparation of highly active catalysts Yb[C(SO2C4F9)3]3, Yb[C(SO2C6F13)3]3, and Yb[C(SO2C
- Barrett, Anthony G.M.,Bouloc, Nathalie,Christopher Braddock,Catterick, David,Chadwick, David,White, Andrew J.P.,Williams, David J.
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- Perfluorosulfonylmethide compounds; use thereof for carbon-carbon bond formation
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Free perfluorosulfonylmethide compounds and metal salts thereof show strong catalytic activity in carbon-carbon bond formation reactions, in amounts as low as 0.1 mole %. Fluorous media may be used, especially biphasic fluorous media enabling ready recycling of the catalyst. The formula thereof is: M[C(SO2R1)3?(m+q)(SO2R2)m(SO2R3)q]xwhere M is H, Sc, Y, La, Ce, Pr, Nd, Sm Eu, Gd, Tb, Dy, Ho, Er, Tm, Yb, Lu, Zr, Hf, Th, Nb, Ta, U, Bi, Al, Ga, In or Tl, x is the common oxidation state of a said metal M, R1, R2and R3are perfluorinated or polyfluoronated hydrocarbon, ether or amine moieties or mixtures thereof and m+q=0, 1, 2 or 3 (m and q being zero or integers).
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Page column 15-16
(2010/02/06)
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- Fluorous biphase catalytic Friedel-Crafts acylation: Ytterbium tris(perfluoroalkanesulfonyl)methide catalysts
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Ytterbium(III) tris(perfluoroalkanesulfonyl)methides were found to be effective catalysts (10 mol%) for the Friedel-Crafts acylation of arenes with acid anhydrides. In addition, with sufficient fluorous content in the ytterbium complex, the reactions could be run under a fluorous biphase regime where the catalyst is recycled and re-used by extraction of the spent acylation reaction mixture with perfluoromethyldecalin.
- Barrett, Anthony G. M.,Braddock, D. Christopher,Catterick, David,Chadwick, David,Henschke, Julian P.,McKinnell, R. Murray
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p. 847 - 849
(2007/10/03)
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- Catalyst system containing a fluorinated acid and a polyvalent tin compound
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A catalyst system is provided which comprises a fluorinated acid and a polyvalent tin compound. The catalyst system can be used to prepare hydroxyl-terminated poly(haloalkylene ethers).
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