Benzylic C-H Radical Sulfation by Persulfates.

Area of Science:

• Organic Chemistry
• Chemical Synthesis

Background:

• Sulfation is crucial in biological and pathological processes but organosulfate accessibility is limited.
• Conventional O-sulfonation is restricted to hydroxyl compounds, hindering diverse library synthesis.

Purpose of the Study:

• To develop a new method for organosulfate synthesis via benzylic C-H functionalization.
• To overcome the limitations of traditional sulfonation techniques for broader applicability.

Main Methods:

• Benzylic C-H radical sulfation using persulfates.
• Control of persulfate reactivity and sulfate radical stability using counterions (K+/NH4+ and n-Bu4N+).
• Formation of carbon-centered radicals and subsequent C-OSO3- bond via S_H2 mechanism.

Main Results:

• Demonstrated a novel strategy for direct benzylic C-H sulfation.
• Achieved modular control over radical generation and persulfate activation.
• Facilitated organosulfate formation through a bimolecular homolytic substitution (S_H2) process.

Conclusions:

• The developed method offers a versatile route to organosulfates from benzylic C-H bonds.
• This strategy expands the toolkit for constructing diverse organosulfate libraries.
• The approach provides enhanced accessibility to valuable organosulfate compounds.