A Pd-catalyzed domino Larock annulation/dearomative Heck reaction

Area of Science:

• Organic Chemistry
• Catalysis
• Synthetic Methodology

Background:

• Indoline derivatives are important scaffolds in medicinal chemistry.
• Efficient synthetic routes to complex indolines are highly sought after.

Purpose of the Study:

• To develop a novel palladium-catalyzed domino reaction for the synthesis of tetracyclic indoline derivatives.
• To establish a straightforward and efficient method for constructing complex indoline structures.

Main Methods:

• A palladium-catalyzed domino reaction involving Larock annulation and dearomative Heck reaction.
• Utilized N-bromobenzoyl o-iodoanilines and alkynes as starting materials.

Main Results:

• Achieved moderate to excellent yields of various tetracyclic indoline derivatives.
• Successfully formed two new rings and three chemical bonds in a single synthetic step.

Conclusions:

• The developed protocol offers a facile and versatile route to structurally diverse indolines.
• This method enables the efficient synthesis of complex indoline architectures from readily available precursors.