Vol. 6, Issue 2, Part A (2024)

Transition metal-catalyzed cross-coupling reactions have become indispensable tools in modern organic synthesis, enabling the efficient formation of carbon-carbon (C-C) and carbon-heteroatom (C-X) bonds. This research provides a comprehensive mechanistic analysis of three pivotal cross-coupling reactions: the palladium-catalyzed Suzuki-Miyaura coupling, the nickel-catalyzed Kumada coupling, and the iron-catalyzed Stille coupling. These reactions are critically evaluated in terms of their catalytic cycles, including key steps such as oxidative addition, transmetalation, and reductive elimination. The mechanistic insights discussed are supported by recent computational advances, particularly in density functional theory (DFT), which have provided significant predictive power in optimizing reaction conditions and designing novel catalysts. By integrating experimental and computational studies, this work contributes to a deeper understanding of the catalytic mechanisms involved in transition metal-catalyzed cross-coupling reactions, offering valuable insights for the development of more effective and sustainable synthetic methodologies. This study underscores the continued evolution of cross-coupling reactions as a cornerstone of organic synthesis.