Kumada cross-coupling reactions metallic catalysts

Other successful examples of catalysts containing NHC ligands are found in palladium- and nickel-catalyzed carbon-carbon bond formations. The catalyst development with these metals has focused in particular on Heck-type reactions, especially the Mizoroki-Heck reaction itself [Eq. (42)] and various cross coupling reactions [Eq. (43)], e.g., the Suzuki-Miyaura reaction ([M] = and the Kumada-Corriu reaction ([M] = MgBr). " Related reactions like the Sonogashira coupling [Eq. (44)]326-329 Buchwald-... 

These transition elements are Fe, Co, Ni, Pd, Cu and Ag. These metal catalysts have respective characteristics. For example, the representative catalytic actions are as follows silver is for alkyl-alkyl homo-coupling, copper is for cross-coupling, nickel and iron are for cross-coupling containing unsaturated halides such alkenyl and aryl halides [56]. These basic reaction examples are shown in eqs. (4.28)-(4.32) [55,56]. Kumada el al. synthesized many compounds as ligands which have... 

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