Electrochemical Benzylic C(sp³)-H Isothiocyanation.

Area of Science:

• Organic Chemistry
• Electrochemistry
• Synthetic Methodology

Background:

• Isothiocyanate derivatives are valuable synthetic targets.
• Selective C-H functionalization is a key area in modern organic synthesis.
• Existing methods for isothiocyanation often require harsh conditions or external oxidants.

Purpose of the Study:

• To develop an efficient and selective electrochemical method for benzylic isothiocyanation.
• To achieve C(sp3)-H functionalization under oxidant-free conditions.
• To demonstrate the utility of the method for late-stage functionalization.

Main Methods:

• Electrochemical synthesis utilizing a novel reaction pathway.
• In situ isomerization of benzylic thiocyanates to isothiocyanates.
• Exploration of reaction conditions for optimal chemoselectivity and site-selectivity.

Main Results:

• Achieved highly chemo- and site-selective benzylic isothiocyanation.
• Demonstrated external oxidant-free conditions.
• Showcased high functional group compatibility.
• Successfully applied the method to late-stage functionalization of bioactive molecules.

Conclusions:

• The developed electrochemical method provides a sustainable and efficient approach for synthesizing isothiocyanate derivatives.
• This methodology expands the toolkit for C-H functionalization, particularly for complex molecules.