Cocatalysis metal

Jiang Y, Hess J, Fox T, Berke H (2010) Rhenium hydride/boron lewis acid cocatalysis of alkene hydrogenations activities comparable to those of precious metal systems. J Am Chem Soc 132 18233-18247... 

Functionalized benzo[b]furans are conveniently obtained from 2-ethinylphenols (21) by transition-metal-mediated cychzations. Use of an Au(I)/Ag(I)- or Rh/BINAP-catalyst system gives 2-substituted benzo[b]furans (22) directly [48], while application of a Pdl2/thiourea/CBr4 cocatalysis system followed by carbonylation of the Pd-intermediate (simplified as 23) in methanol yields benzo[b]furan-3-carboxylates 24 [49] ... 

In the presence of certain metals, notably Cu, Ni, and Co, catalyzed decomposition takes place by additional pathways [5,11,12]. Iron is only weakly catalytic by itself, but contributes to cocatalysis with other metals. The simplest case is with Cu at less than 1 ppm, where the reaction is homogeneous and first order in both hypochlorite and Cu. 

Kim, Y., Park, J., and Kim, M. J. (2011). D5mamic kinetic resolution of amines and amino acids by enzyme-metal cocatalysis. ChemCatChem, 3,271-277. 

---