The Suzuki-Miyaura reaction of 1-iodo-cyclohexene and phenylboronic acid (or 3-trifluoromethoxy-phenylboronic acid) was investigated concerning the detailed analyses of the catalytic mixtures. The reaction was carried out both under argon ('direct' Suzuki-Miyaura coupling) and carbon monoxide ('carbonylative' Suzuki-Miyaura reaction). Palladium(II) acetate based in situ formed palladium(O) catalysts were used as catalytic system. The detailed analysis revealed the importance of the formation of the Heck-products and the homo-coupling of the substrate. The corresponding alkenyl-aryl-ketone was obtained by carbon monoxide insertion into palladium(II)-aryl bond. (c) 2006 Elsevier B.V. All rights reserved.