Dual 1,2-Migration-Enabled β-Boryl Amide Synthesis.

Area of Science:

• Organic Chemistry
• Synthetic Chemistry
• Medicinal Chemistry

Background:

• Metal-free synthetic strategies are highly sought after in organic chemistry.
• Developing efficient routes to complex organic molecules like β-boryl amides is crucial for drug discovery and materials science.

Purpose of the Study:

• To develop a novel, metal-free synthetic route for multisubstituted β-boryl amides.
• To explore the utility of dioxazolones and vinyl boronate complexes in constructing complex organic structures.
• To demonstrate the synthetic versatility of the newly developed protocol.

Main Methods:

• Coupling of dioxazolones with vinyl boronate complexes.
• Utilizing a Curtius-type rearrangement of dioxazolones to generate isocyanates in situ.
• Characterization of the synthesized β-boryl amides and their downstream transformations.

Main Results:

• Successful synthesis of multisubstituted β-boryl amides via a metal-free pathway.
• Efficient construction of structurally diverse β-boryl amides containing a borylated quaternary carbon center.
• Demonstration of the broad synthetic utility through subsequent modifications of the boron and carbonyl groups.

Conclusions:

• The developed protocol offers a novel and efficient metal-free method for synthesizing β-boryl amides.
• This approach provides access to valuable borylated compounds with potential applications in various chemical fields.
• The synthetic flexibility of the method allows for further derivatization, expanding its utility.