Equilibrium-driven decarbonylative multi-deuteration enables access to highly deuterated carbon frameworks

Area of Science:

• Organic Chemistry
• Isotopic Labeling
• Synthetic Methodology

Background:

• Deuterium incorporation enhances metabolic stability and aids reaction mechanism studies.
• Current methods for deuteration are limited to single deuterium atoms or lack site selectivity.
• Accessing multi-deuterated carbon centers is challenging with existing techniques.

Purpose of the Study:

• To develop a cost-effective strategy for decarbonylative multi-deuteration of aldehydes.
• To overcome limitations of existing methods for site-selective deuteration.
• To provide a practical platform for synthesizing highly deuterated carbon frameworks.

Main Methods:

• Integration of polar alpha-deuteration, thiyl radical-mediated hydrogen atom transfer (HAT), and decarbonylative deuteration.
• Utilizing an equilibrium-controlled radical-polar process with irreversible trapping of alkyl radicals.
• Employing inexpensive, commercially available reagents.

Main Results:

• Successful multi-deuteration of primary, secondary, and tertiary aldehydes.
• Broad substrate scope, including structurally complex aldehydes.
• Demonstrated a cost-effective and practical approach for deuteration.

Conclusions:

• The developed strategy enables efficient synthesis of multi-deuterated aldehydes.
• Offers new opportunities for isotopic labeling in medicinal chemistry.
• Provides a versatile platform for creating complex deuterated molecules.