Palladium-catalyzed post-Ugi arylative dearomatization/Michael addition cascade towards plicamine analogues
Chao Liu1, Ruiqi Zhao1, Liangliang Song2
1Laboratory for Organic & Microwave-Assisted Chemistry (LOMAC), Department of Chemistry, KU Leuven Celestijnenlaan 200F, 3001, Leuven, Belgium. erik.vandereycken@kuleuven.be.
A novel palladium-catalyzed reaction efficiently creates diverse plicamine analogues from Ugi-adducts. This method combines Ugi-4CR and dearomatization for rapid, step-economical synthesis of complex molecules.
Area of Science:
- Organic Chemistry
- Catalysis
- Medicinal Chemistry
Background:
- Ugi-4CR reactions are versatile multicomponent reactions.
- Palladium catalysis is crucial for C-C and C-N bond formation.
- Plicamine analogues have potential biological activities.
Purpose of the Study:
- To develop a novel synthetic route to plicamine analogues.
- To utilize a cascade dearomatization/aza-Michael addition process.
- To achieve rapid, efficient, and step-economical synthesis.
Main Methods:
- Palladium-catalyzed intramolecular cyclization of Ugi-adducts.
- Cascade reaction involving dearomatization and aza-Michael addition.
- Combination of Ugi-4CR and palladium-catalyzed dearomatization.
Main Results:
- Diverse plicamine analogues were successfully synthesized.
- The reaction proceeded in a rapid, highly efficient, and step-economical manner.
- The synthetic utility was demonstrated through further functional group transformations.
Conclusions:
- A novel and efficient method for synthesizing plicamine analogues has been established.
- The developed approach offers a powerful tool for medicinal chemistry and drug discovery.
- The cascade reaction provides a streamlined pathway to complex molecular architectures.
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