Copper-catalyzed cross-dehydrogenative coupling between quinazoline-3-oxides and indoles

Area of Science:

• Organic Chemistry
• Synthetic Chemistry
• Heterocyclic Chemistry

Background:

• Quinazoline derivatives are important scaffolds in medicinal chemistry.
• Indole moieties are prevalent in biologically active natural products and pharmaceuticals.
• Efficient synthesis of biheteroaryl compounds is crucial for drug discovery.

Purpose of the Study:

• To develop a novel and straightforward protocol for synthesizing 4-(indole-3-yl)quinazolines.
• To explore the cross-dehydrogenative coupling reaction between quinazoline-3-oxides and indoles.
• To establish a method for generating diverse biheteroaryl products.

Main Methods:

• Cross-dehydrogenative coupling reaction.
• Utilized quinazoline-3-oxides and indoles as starting materials.
• Conducted the reaction under an air atmosphere, simplifying the experimental setup.

Main Results:

• Successfully synthesized a series of 4-(indole-3-yl)quinazolines.
• Achieved moderate to good yields for the target biheteroaryl products.
• Demonstrated the utility of the developed protocol for accessing complex heterocyclic structures.

Conclusions:

• A novel and simple protocol for synthesizing 4-(indole-3-yl)quinazolines has been established.
• The cross-dehydrogenative coupling approach offers an efficient route to valuable biheteroaryl compounds.
• This method provides a valuable tool for organic chemists and drug discovery researchers.