Modular access to alkylfluorides via radical decarboxylative-desulfonylative gem-difunctionalization

Area of Science:

• Organic Chemistry
• Photochemistry
• Fluorine Chemistry

Background:

• Fluorine-containing compounds are crucial in life sciences, driving demand for efficient synthetic methods.
• Radical-mediated decarboxylative fluorination is an established technique for introducing monofluoroalkyl groups.
• Developing novel, mild, and versatile fluorination strategies remains an active area of research.

Purpose of the Study:

• To develop a novel radical-mediated synthesis of alkyl fluorides.
• To achieve gem-difunctionalization via a decarboxylative-desulfonylative pathway.
• To enable the late-stage incorporation of monofluoroalkyl moieties into complex molecules.

Main Methods:

• A multi-component reaction involving radical decarboxylation and heteroaryl migration.
• Mild photochemical conditions were employed to initiate the radical cascade.
• Utilized sulfinate salts as precursors for the fluorinated alkyl groups.

Main Results:

• Successfully synthesized a wide range of valuable alkyl fluorides.
• Demonstrated the formation of two C-C bonds and one C-F bond concurrently.
• Showcased the method's applicability to both styrenes and aliphatic alkenes, including complex substrates.

Conclusions:

• The developed photochemical method offers a modular and efficient route to alkyl fluorides.
• The reaction mechanism is governed by radical polarity and kinetic factors, allowing controlled difunctionalization.
• This approach provides a powerful tool for late-stage fluorination in organic synthesis.