Intermolecular Radical Mediated Anti-Markovnikov Alkene Hydroamination Using N-Hydroxyphthalimide

Area of Science:

• Organic Chemistry
• Synthetic Methodology

Background:

• Hydroamination reactions are crucial for synthesizing nitrogen-containing compounds.
• Developing efficient and selective intermolecular hydroamination methods remains a challenge.

Purpose of the Study:

• To develop a novel intermolecular anti-Markovnikov hydroamination of alkenes.
• To establish a versatile method for accessing primary amines.

Main Methods:

• Utilized triethyl phosphite and N-hydroxyphthalimide as key reagents.
• Investigated the reaction scope with various alkenes, including vinyl ethers, silanes, sulfides, and unactivated alkenes.
• Employed mechanistic probes to elucidate the reaction pathway.

Main Results:

• Successfully achieved intermolecular anti-Markovnikov hydroamination of a wide range of alkenes.
• Demonstrated the tolerance of diverse functional groups within the alkene substrates.
• Showcased the facile conversion of the N-alkylphthalimide products to primary amines.
• Identified a phosphite-promoted radical deoxygenation mechanism involving phthalimidyl radicals.

Conclusions:

• Developed a robust and versatile method for anti-Markovnikov hydroamination.
• The methodology offers a valuable pathway for the synthesis of primary amines.
• The mechanistic understanding provides insights into phosphite-mediated radical processes.