Mechanistic insights on C(acyl)-N functionalisation mediated by late transition metals

Area of Science:

• Organic Chemistry
• Catalysis
• Biochemistry

Background:

• Carboxamide groups are vital in organic and biological chemistry.
• Amides are typically stable due to electron delocalization (n_N → π*_CO).
• Transition metal catalysis has recently enabled new synthetic transformations of amides.

Purpose of the Study:

• To review and analyze the mechanisms of C(acyl)-N functionalization of amides.
• To focus on recent advancements and mechanisms unique to late transition metals.
• To provide an outlook on future research directions.

Main Methods:

• Literature aggregation and analysis of mechanistic studies.
• Categorization of mechanisms into redox-neutral, 2e^- redox-cycling, and 1e^- redox steps.
• Focus on reactions involving direct transition metal involvement in C(acyl)-N cleavage.

Main Results:

• Detailed analysis of three primary mechanistic manifolds for C(acyl)-N functionalization.
• Highlighting mechanisms particularly relevant to late transition metal catalysis.
• Identification of key catalytic cycles and intermediates.

Conclusions:

• Understanding C(acyl)-N functionalization mechanisms is crucial for advancing amide chemistry.
• Late transition metals offer unique catalytic pathways for amide transformations.
• Significant opportunities exist for further mechanistic elucidation and catalyst development.