Organoboron Reagent-Controlled Selective (Deutero)Hydrodefluorination

Area of Science:

• Organic Chemistry
• Medicinal Chemistry
• Electrochemistry

Background:

• Fluoroalkyl moieties like CF2H and CFH2 are crucial in drug discovery.
• Synthesizing these moieties often involves deutero(hydro)defluorination of CF3-containing compounds.
• Achieving chemoselective replacement of fluorine atoms remains a synthetic challenge.

Purpose of the Study:

• To develop a selective deutero(hydro)defluorination reaction using electrolysis.
• To achieve controllable replacement of fluorine atoms with high chemoselectivity.
• To provide access to valuable building blocks for medicinal chemistry.

Main Methods:

• Electrochemical selective deutero(hydro)defluorination of CF3-containing compounds.
• Utilizing different organoboron sources to control chemoselectivity.
• Density Functional Theory (DFT) calculations to investigate reaction mechanisms.

Main Results:

• A novel electrochemical method for selective deutero(hydro)defluorination was established.
• Remarkable chemoselectivity control was achieved through the addition of organoboron sources.
• The reaction is operationally simple, scalable, and provides direct access to target molecules.

Conclusions:

• The developed electrochemical method offers a powerful tool for synthesizing deuterium-labeled fluoroalkyl building blocks.
• The organoboron-mediated chemoselectivity provides a new strategy for controlling defluorination reactions.
• This approach facilitates the incorporation of valuable moieties in medicinal chemistry applications.