Three-Dimensional Heterocycles by Iron-Catalyzed Ring-Closing Sulfoxide Imidation

Area of Science:

• Organic Chemistry
• Catalysis
• Heterocyclic Chemistry

Background:

• Sulfoximines are important structural motifs in medicinal chemistry.
• Efficient synthesis of cyclic sulfoximines remains a challenge.
• Developing catalytic methods for heterocyclic synthesis is crucial.

Purpose of the Study:

• To develop a general and atom-economical method for synthesizing cyclic sulfoximines.
• To utilize iron phthalocyanine (FeII Pc) as a catalyst for intramolecular imidations.
• To explore the functional group tolerance and modification potential of the synthesized heterocycles.

Main Methods:

• Intramolecular imidation of azido-containing sulfoxides.
• Catalysis using commercially available iron(II) phthalocyanine (FeII Pc).
• Characterization of synthesized cyclic sulfoximines.

Main Results:

• A general and atom-economical synthesis of cyclic sulfoximines was achieved.
• The FeII Pc catalyzed reaction demonstrated broad functional group tolerance.
• The resulting three-dimensional heterocycles were amenable to further modification via cross-coupling reactions.

Conclusions:

• The developed method provides an efficient route to diverse cyclic sulfoximines.
• Iron phthalocyanine is an effective catalyst for this transformation.
• The synthesized heterocycles serve as valuable building blocks for further chemical exploration.