Palladium carbene complexes derived from imidazolium-linked ortho-cyclophanes
Journal of the Chemical Society Dalton Transactions2001Iss. 2, pp. 111–120
Citations Over TimeTop 10% of 2001 papers
Abstract
Reaction of imidazolium-linked ortho-cyclophanes with nickel(II) and palladium(II) salts in the presence of acetate base led to the formation of complexes where a metal centre is bound by a pair of heterocyclic carbenes which themselves are part of a cyclophane skeleton. These cyclophane–metal complexes have been characterised by NMR spectroscopy and (for five complexes) X-ray diffraction studies. The complexes are highly active as promoters of Heck and Suzuki couplings, with preliminary studies showing Heck reactions with turnover numbers approaching 107.
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