Alkenyl iodides, bromides and chlorides react with organomagnesium reagents in THF, in the presence of Co(acac) 2 and NMP (9 to 4 equiv.), to give the cross-coupling products in good yields. The reaction is chemoselective (aryl or alkyl bromides, esters and ketones) and stereoselective (≤ 99.5%).
Cahiez, G., & Avedissian, H. (1998). Cobalt-catalyzed alkenylation of organomagnesium reagents. Tetrahedron Letters, 39(34), 6159–6162. https://doi.org/10.1016/S0040-4039(98)01266-0