PCET-Enabled Olefin Hydroamidation Reactions with N-Alkyl Amides

Area of Science:

• Organic Chemistry
• Photocatalysis
• Synthetic Methodology

Background:

• Olefin aminations are crucial for synthesizing aliphatic carbon-nitrogen bonds.
• Existing methods often face limitations in scope or functional group tolerance.

Purpose of the Study:

• To develop a novel catalytic protocol for olefin hydroamidation.
• To enable efficient C-N bond formation via transient amidyl radical intermediates.

Main Methods:

• Utilized an excited-state iridium photocatalyst for activation.
• Employed a dialkyl phosphate base to facilitate proton-coupled electron transfer (PCET).
• Generated transient amidyl radical intermediates from N-alkyl amides.

Main Results:

• Demonstrated a broad substrate scope and high functional group tolerance.
• Showcased the method's amenability to cascade polycyclization reactions.
• Successfully achieved intermolecular anti-Markovnikov hydroamidation of unactivated olefins.

Conclusions:

• The developed PCET protocol offers a versatile and efficient route for olefin hydroamidation.
• This method expands the toolkit for constructing C-N bonds in organic synthesis.
• The protocol's ability to functionalize unactivated olefins represents a significant advancement.