Ex Situ Generation of D₂ for Reductive Deuteration: Scope and Application to Late-Stage Functionalization

Area of Science:

• Organic Chemistry
• Medicinal Chemistry
• Synthetic Chemistry

Background:

• Deuterated compounds offer unique pharmacological properties.
• Efficient methods for introducing deuterium are crucial for drug development.
• Existing deuteration techniques can be complex or require specialized equipment.

Purpose of the Study:

• To report an efficient ex situ deuteration method.
• To synthesize deuterated biologically significant molecules.
• To enable late-stage deuteration of various unsaturated compounds.

Main Methods:

• Ex situ generation of deuterium gas (D2).
• Reductive deuteration of α-substituted acrylic acids and enamide derivatives.
• Utilizing deuterium oxide (D2O) as a safe and economical deuterium source.

Main Results:

• Successful synthesis of deuterated analogs of NSAIDs (ibuprofen, flurbiprofen, naproxen).
• Facilitated late-stage deuteration of enamides and N-vinylated drugs.
• Extended application to N-vinyl azoles, cinnamic acid derivatives, and other unsaturated substrates.

Conclusions:

• The developed method is practical and efficient for deuteration.
• It offers a safe, economical, and versatile approach using D2O.
• The technique is suitable for standard laboratory setups, enhancing accessibility.