Ni-Catalyzed C-C Couplings Using Alkyl Electrophiles.

Area of Science:

• Organic Chemistry
• Catalysis
• Organometallic Chemistry

Background:

• Significant advancements in nickel-catalyzed cross-coupling reactions have occurred over the past two decades.
• Nickel catalysts facilitate the coupling of primary, secondary, and tertiary alkyl electrophiles with diverse organometallic reagents.
• Nickel catalysis has enabled new asymmetric cross-coupling reactions using alkyl halides.

Purpose of the Study:

• To review recent progress in nickel-catalyzed cross-coupling reactions.
• To cover reactions involving sp(3)-, sp(2)-, and sp-hybridized organometallic reagents.
• To discuss mechanistic insights into nickel catalysis.

Main Methods:

• Review of literature on nickel-catalyzed cross-coupling reactions.
• Analysis of methods for coupling various alkyl electrophiles (primary, secondary, tertiary) with organometallic reagents.
• Examination of asymmetric variants and mechanistic studies.

Main Results:

• Nickel catalysts effectively couple sterically hindered alkyl electrophiles with organometallic reagents.
• Asymmetric cross-coupling reactions using alkyl halides have been significantly advanced by nickel catalysis.
• A broad range of organometallic reagents (sp(3)-, sp(2)-, and sp-hybridized) are compatible with nickel catalysis.

Conclusions:

• Nickel catalysis has become a powerful tool for carbon skeleton construction.
• The development of nickel-catalyzed cross-coupling reactions continues to expand the scope of synthetic chemistry.
• Further mechanistic understanding will likely lead to even more efficient and selective catalytic systems.