Redox-Active α-Amino-CF₃ Reagents: Developing and Applications in Ni-Catalyzed Reductive Cross-Coupling

Area of Science:

• Organic Chemistry
• Medicinal Chemistry
• Fluorine Chemistry

Background:

• Trifluoromethylated amino acids (α-Amino-CF3) are crucial in drug discovery for enhancing metabolic stability and biological activity.
• Existing synthetic methods for α-Amino-CF3 compounds often suffer from limited functional group tolerance and are unsuitable for late-stage functionalization.

Purpose of the Study:

• To develop novel, easily accessible redox-active α-Amino-CF3 reagents.
• To establish a versatile platform for the late-stage functionalization of α-Amino-CF3 compounds.

Main Methods:

• Synthesis of novel redox-active α-Amino-CF3 reagents from trifluoro acetaldehyde hydrates.
• Nickel-catalyzed coupling reactions of these reagents with various electrophiles, including alkynyl bromides, aryl bromides, and enol triflates.

Main Results:

• Successful preparation of new redox-active α-Amino-CF3 reagents.
• Demonstration of the reagents' versatility as building blocks in nickel-catalyzed coupling reactions.
• Broad scope of coupling partners, including alkynyl bromides, aryl bromides, and enol triflates.

Conclusions:

• The developed redox-active α-Amino-CF3 reagents offer a significant advancement in the synthesis of trifluoromethylated compounds.
• These reagents provide a general and efficient approach for late-stage functionalization, valuable for medicinal chemistry and drug development.