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Area of Science:

  • Organic Chemistry
  • Catalysis
  • Synthetic Methodology

Background:

  • Chain-walking, the dynamic translocation of metal catalysts along alkyl chains, enables functionalization of unactivated C(sp3)-H sites.
  • Nickel complexes are increasingly utilized in chain-walking due to their versatility in forming sp3 architectures and facilitating diverse reaction manifolds.

Purpose of the Study:

  • To review the impact and relevance of nickel-catalyzed chain-walking in synthetic chemistry.
  • To highlight recent advancements and mechanistic insights in Ni-catalyzed chain-walking strategies.

Main Methods:

  • Review of recent literature on nickel-catalyzed chain-walking reactions.
  • Discussion of mechanistic aspects and synthetic applications.
  • Exploration of the integration of chain-walking with photoredox and electrochemical methods.

Main Results:

  • Nickel-catalyzed chain-walking provides novel retrosynthetic pathways for C-H functionalization.
  • The redox flexibility of nickel complexes supports both one-electron and two-electron processes.
  • Emerging strategies merge chain-walking with photoredox catalysis and electrochemistry for challenging transformations.

Conclusions:

  • Nickel-catalyzed chain-walking is a powerful tool for synthetic chemists, expanding the scope of C-H functionalization.
  • The continued development of this methodology promises to unlock new synthetic possibilities and streamline complex molecule synthesis.