Site isolated base and acid catalyzed azaspirocyclization cascades

Area of Science:

• Organic Chemistry
• Synthetic Chemistry
• Catalysis

Background:

• Azaspirocyclic molecules are important scaffolds in medicinal chemistry.
• Efficient synthetic routes to these compounds are highly sought after.

Purpose of the Study:

• To develop a novel, efficient, and versatile method for synthesizing azaspirocyclic molecules.
• To utilize a one-pot, catalyzed cyclization cascade for azaspirocycle construction.

Main Methods:

• Employing a one-pot, site-isolated base (PS-BEMP) and acid (Si-TsOH) catalyzed cyclization cascade.
• Investigating the reaction scope and efficiency for diverse azaspirocyclic products.

Main Results:

• Successful synthesis of various azaspirocyclic molecules through a simple and efficient process.
• The reaction demonstrated high atom economy, with water as the sole byproduct.

Conclusions:

• The reported method provides a straightforward and atom-efficient route to diverse azaspirocyclic compounds.
• This approach offers a valuable tool for accessing complex molecular architectures.