Ruthenium-Catalyzed Enyne Metathesis: An Entry to Functionalized Azaborine Heterocycles.

Area of Science:

• Organic Chemistry
• Organometallic Chemistry
• Green Chemistry

Background:

• Polycyclic azaborine skeletons are important structural motifs in medicinal chemistry and materials science.
• Existing synthetic routes often involve harsh conditions or limited functional group tolerance.

Purpose of the Study:

• To develop a novel, efficient, and environmentally friendly synthetic methodology for preparing functionalized polycyclic azaborine skeletons.
• To explore the scope and limitations of the developed synthetic route.

Main Methods:

• Ruthenium-catalyzed ring-closing enyne metathesis using the Grubbs-II catalyst.
• Optimization of reaction conditions using dimethyl carbonate as a green solvent.
• Synthesis and characterization of novel boronated scaffolds.

Main Results:

• Successful preparation of 28 novel functionalized polycyclic azaborine derivatives.
• Demonstration of a green and efficient synthetic route.
• Identification of further functionalization potential in the synthesized diene-containing scaffolds.
• Computational analysis revealed isoelectronic and isostructural relationships with potential isosteres.

Conclusions:

• The reported ruthenium-mediated enyne metathesis provides a powerful and green approach to complex boronated heterocyclic compounds.
• The developed methodology offers a direct pathway to versatile functionalized scaffolds.
• The findings open avenues for the design of new molecules with potential applications in various fields.