Nickel-Catalyzed Aryl Borylations: Opportunities and Challenges for Innovation

Area of Science:

• Organic Chemistry
• Catalysis
• Synthetic Methodology

Background:

• Aryl boronic acids and esters are versatile synthetic building blocks.
• Palladium (Pd) and Iridium (Ir) catalysis are well-established for borylation reactions.
• Nickel (Ni) catalysis presents a cost-effective and sustainable alternative, enabling unique reactivity.

Purpose of the Study:

• To review the current literature on Ni-catalyzed aryl borylation.
• To identify challenges and suggest future research directions for Ni-catalyzed borylation.

Main Methods:

• Literature review of Ni-catalyzed aryl borylation methods.
• Discussion of mechanistic pathways and substrate scope.
• Analysis of existing limitations and future opportunities.

Main Results:

• Ni catalysis provides economic and environmental benefits over precious metals.
• Ni catalysis can access substrates and pathways not achievable with Pd.
• Current Ni-catalyzed methods lack general conditions, hindering widespread adoption.

Conclusions:

• Advances in mechanistic understanding, ligand design, high-throughput screening, and machine learning are crucial.
• Developing general reaction conditions will facilitate broader application of Ni-catalyzed aryl borylation.
• Ni-catalyzed borylation has the potential to become a competitive synthetic strategy.