Copper(II) triflate explained

Copper(II) triflate is the copper(II) salt of trifluoromethanesulfonic acid (known simply as triflic acid) which has a chemical formula of Cu(OSO2CF3)2, abbreviated Cu(OTf)2. This substance, first reported in 1972,[1] is a powerful Lewis acid. It is used as a catalyst in several organic reactions, such as the Diels–Alder reaction[2] and cyclopropanation reactions[3] (much like rhodium(II) acetate).

Notes and References

  1. Solvolytic Routes via Alkylcopper Intermediates in the Electron-Transfer Oxidation of Alkyl Radicals . Journal of the American Chemical Society . Jenkins . C.L. . Kochi . J.K. . 94 . 3 . 1972 . 843–855 . 10.1021/ja00758a024.
  2. Journal of the American Chemical Society . Chiral Bis(oxazoline)copper(II) Complexes as Lewis Acid Catalysts for the Enantioselective Diels–Alder Reaction . 121 . 33 . 7559–7573 . Evans . D.A. . Miller . S.J. . Lectka . T. . von Matt . P. . 1999 . 10.1021/ja991190k.
  3. Journal of the American Chemical Society . 95 . 10 . 3300–3310 . Salomon . R.G. . Kochi . J.K . Copper(I) catalysis in cyclopropanations with diazo compounds. Role of olefin coordination . 1973 . 10.1021/ja00791a038.

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