Iron Catalysis in Reduction and Hydrometalation Reactions

Area of Science:

• Catalysis
• Organic Synthesis
• Green Chemistry

Background:

• Iron is an economical and sustainable transition metal alternative in homogeneous catalysis.
• Significant improvements in iron catalysis have been observed over the last two decades.
• Iron catalysts are effective in various catalytic organic synthetic transformations, especially reductions.

Purpose of the Study:

• To review the development and recent advances in selective reductions using iron catalysts.
• To cover reductions of olefins, alkynes, carbonyl and carboxylic derivatives, imines, and nitro compounds.
• To report on hydrogen-borrowing reactions and hydroboration promoted by iron.

Main Methods:

• Literature review of iron-catalyzed reactions.
• Focus on selective reduction methodologies.
• Inclusion of hydrogen-borrowing and hydroboration reactions.

Main Results:

• Iron catalysts efficiently promote the reduction of various unsaturated bonds.
• Advances in selective reduction of olefins, alkynes, carbonyls, imines, and nitro compounds are detailed.
• Iron catalysis is shown to be a viable green alternative for synthetic transformations.

Conclusions:

• Iron catalysis has significantly advanced in the last 20 years, offering economic and sustainable solutions.
• The review provides an overview of the state-of-the-art in iron catalysis for selective reductions.
• This work aims to stimulate further development of superior and greener iron-based catalytic systems.