Recent Strategies for Carbon-Halogen Bond Formation Using Nickel

Area of Science:

• Organic Chemistry
• Catalysis
• Synthetic Methodology

Background:

• Nickel catalysis has emerged as a powerful tool for complex organic synthesis.
• Recent advances have expanded its utility beyond C-C and C-N bond formation into C-X bond generation.

Purpose of the Study:

• To review emerging strategies in nickel-catalyzed halogenation (C-X bond formation).
• To consolidate recent breakthroughs in expanding the scope and utility of these methods.

Main Methods:

• Review of six key nickel-catalyzed halogenation strategies.
• Discussion of oxidatively induced C-X reductive elimination.
• Exploration of triflate-to-halogen exchange reactions.
• Analysis of directed and non-directed C-H halogenation.
• Examination of enantioselective α-fluorination and 1,2-difunctionalization-halogenation.
• Coverage of nickel-catalyzed hydrohalogenation and carbohalogenation.

Main Results:

• Demonstration of nickel's versatility in various C-X bond formations.
• Highlighting of six distinct and innovative nickel-catalyzed halogenation approaches.
• Identification of advancements in directed and non-directed C-H halogenation.
• Showcasing enantioselective methods for α-fluorination.
• Presentation of novel difunctionalization-halogenation reactions.

Conclusions:

• Nickel catalysis offers a broad and expanding toolkit for C-X bond formation.
• Emerging strategies significantly enhance the synthetic utility of halogenation reactions.
• Continued development in nickel-catalyzed methods promises further synthetic innovations.