The olefinic products arising from he oxidative addition at ambient temperatures of 2,2,6,6-tetramethyl-cyclohex-1-yl toluene-p-sulphonate to (PPh3)2CoBr2,(PPh3)2NiBr2, and hydroxo-cobalamin, all reduced with sodium borohydride, or to (Me)2CuLi, provide firm evidence for a novel mechanism of the 1,2-bond shift rearrangements catalysed by vitamin B12 coenzyme.
R. Hamilton, T. R. B. Mitchell, E. A. McIlgorm, J. J. Rooney and M. A. McKervey, J. Chem. Soc., Chem. Commun., 1981, 686 DOI: 10.1039/C39810000686
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