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Ligand-modulated ring-expansion.

Veronica Carta¹, Miguel A Soto, Mark J MacLachlan

¹Department of Chemistry, University of British Columbia, 2036 Main Mall, Vancouver, British Columbia V6T 1Z1, Canada. mmaclach@chem.ubc.ca.

Chemical Communications (Cambridge, England)

|January 12, 2019

Summary

This summary is machine-generated.

Researchers expanded a palladium macrocycle using ring-opening metathesis. A bulky ligand coordinated to palladium, transforming a monometallic macrocycle into a bimetallic dimer.

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Area of Science:

Organometallic Chemistry
Macromolecular Chemistry
Catalysis

Background:

Palladium-containing macrocycles are important in catalysis and materials science.
Controlled expansion of macrocyclic structures remains a synthetic challenge.

Purpose of the Study:

To develop a novel strategy for expanding palladium-containing macrocycles.
To investigate the transformation of monometallic macrocycles into bimetallic structures.

Main Methods:

Ring-opening metathesis strategy.
Coordination of a bulky ligand (2,6-lutidine) to a palladium center.

Main Results:

Successfully expanded an unstrained palladium-containing macrocycle.
Demonstrated the transformation of a monometallic macrocycle into a bimetallic dimeric macrocycle.
The reaction was driven by ligand coordination, highlighting steric control.

Conclusions:

Ring-opening metathesis provides an effective route for macrocycle expansion.
Bulky ligand coordination can controllably induce dimerization of metallomacrocycles.