[Structural Optimization in Nitrile Synthesis via Desulfonylative Smiles Rearrangement]

Area of Science:

• Organic Chemistry
• Synthetic Chemistry

Background:

• Nitriles are crucial in pharmaceuticals, agrichemicals, and materials.
• Traditional nitrile synthesis uses toxic metal cyanides (e.g., CuCN, KCN).
• A safer, metal-free synthetic route is highly desirable.

Purpose of the Study:

• To develop a cyanide- and transition metal-free method for nitrile synthesis.
• To enable the preparation of diverse (hetero)aromatic and aliphatic nitriles.
• To provide a versatile building block for organic synthesis.

Main Methods:

• Base-promoted desulfonylative Smiles rearrangement of N-acyl (2-nitrophenyl)sulfonamides.
• Utilized potassium acetate as a base.
• Employed 1,3-dimethyl-2-imidazolidinone as a solvent.

Main Results:

• Efficient synthesis of various nitriles, including those with primary, secondary, and tertiary carbon centers.
• Broad functional group compatibility demonstrated.
• Good to excellent yields achieved under simple reaction conditions.

Conclusions:

• The developed method offers a safe and efficient alternative to conventional nitrile synthesis.
• This approach expands the synthetic utility of N-acyl (2-nitrophenyl)sulfonamides.
• The reaction is operationally simple and scalable for producing diverse nitriles.